Mad 22617 Sample Papers

Zeal Education Society’s
ZEAL POLYTECHNIC, PUNE.

NARHE │PUNE -41 │ INDIA
THIRD YEAR (TY)
DIPLOMA IN COMPUTER ENGINEERING

SCHEME: I SEMESTER: VI
NAME OF SUBJECT: MOBILE APPLICATION DEVELOPMENT

SUBJECT CODE: 22617
MSBTE QUESTION PAPERS & MODEL ANSWERS

1. MSBTE SUMMER -22 EXAMINATION
2. MSBTE WINTER -22 EXAMINATION
3. MSBTE SUMMER -23 EXAMINATION
4. MSBTE WINTER -23 EXAMINATION
MAHARASHTRA STATE BOARD OF TECHNICAL EDUCATION
(Autonomous)
(ISO/IEC - 27001 - 2013 Certified)
__________________________________________________________________________________________________
SUMMER – 2022 EXAMINATION
Subject Name: Mobile Application Development Model Answer Subject Code: 22617
Important Instructions to examiners: XXXXX
1) The answers should be examined by key words and not as word-to-word as given in the model answer scheme.
2) The model answer and the answer written by candidate may vary but the examiner may try to assess the
understanding level of the candidate.
3) The language errors such as grammatical, spelling errors should not be given more Importance (Not applicable for
subject English and Communication Skills.
4) While assessing figures, examiner may give credit for principal components indicated in the figure. The figures
drawn by candidate and model answer may vary. The examiner may give credit for any equivalent figure drawn.
5) Credits may be given step wise for numerical problems. In some cases, the assumed constant values may vary and
there may be some difference in the candidate’s answers and model answer.
6) In case of some questions credit may be given by judgement on part of examiner of relevant answer based on
candidate’s understanding.
7) For programming language papers, credit may be given to any other program based on equivalent concept.
8) As per the policy decision of Maharashtra State Government, teaching in English/Marathi and Bilingual (English +
Marathi) medium is introduced at first year of AICTE diploma Programme from academic year 2021-2022. Hence if
the students in first year (first and second semesters) write answers in Marathi or bilingual language (English
+Marathi), the Examiner shall consider the same and assess the answer based on matching of concepts with
model answer.
Q. Sub Answer Marking

No. Q. N. Scheme
Note: As Android programs contain many of the generated code statements from IDE,
while assessing such answers correct logical steps taken to obtain the required output
can be considered.
1 Attempt any FIVE of the following: 10 M
a) List any four features of Android operating system. 2M
Ans Features of Android Operating System: (Any four, ½

1)Storage M for one
2)Multitasking feature)
3)Web Browser
4)Open Source
5)Accessibility
6)Media Support
7)Streaming Media Support
8)Voice Based Features
9)Multitouch
10)External Storage
11)Video Calling
12)Handset Layout
13)Google cloud Messaging
14)WiFi Direct
b) Define Dalvik Virtual Machine (DVM). 2M
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Ans Dalvik Virtual Machine is a register-based machine that compiles byte code to get dex (Correct
code and that ensures that a device can run multiple instances efficiently. definition
2 M)
c) List any four folders from directory structure of Android project and 2M
elaborate in one line.
Ans Folders from directory structure: (List of
1)app: The App folder contains three subfolders (manifests, java and res) that make up names of any
our application. four folders :
They are divided so that it should be fairly easy to determine which resources go in which 1 M and
folder. elaboration
2)Manifest: This is where we would put our manifest files. Most Android apps have in one line
single manifest file. But an app may have several manifest files due to application
:1 M)
versioning, or for supporting specific hardware.
3)Java: This is the folder in our project where we will be storing all of the source code
files written in Java programming language.
4)res: It contains folders that help us to separate and sort the resources of our application.
Resources
basically mean all the needed files except the source code.
5)drawable: The drawable folder contains graphics that can be drawn to the screen.
6)layout: The layout folder contains XML files used for your layouts. These file are used
to set up the layout for your Activity and is used for basic alignment of your layouts,
components, widgets, and similar
resources that are used for the UI of your application.
7)mipmap : The mipmap folder contains the launcher icon files for the app. A launcher
icon is a graphic that
represents your app to users.
8)values: The values folder contains XML files that contain simple values, such as
strings, integers, and colors.
The values folder is used to keep track of the values we will be using in our application.
d) List any four attributes of check box. 2M
Ans 1)id (Any four

2)checked attribute, ½
3)gravity M for each)
4)text
5)text color
6)text size
7)text style
8)background
9)padding
e) Draw diagram of activity life cycle. 2M
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Ans (2 M for
correct
diagram)
f) State syntax to display built in zoom control. 2M
Ans a) Built in Zoom control in Google map can be displayed with : Correct
Syntax : 2
UiSettings.setZoomControlsEnabled(true); M)
OR
b) In case, while display Google map by intent, default zoom level can be given in
the form of data as
geo:latitude,longitude?z=zoom
where lat and lag are for location and zoom level is to set initial zoom level which
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ranges from 0 to 21.
OR
c) In any normal activity, ZoomControl can be displayed as component by following

syntax :
ZoomControl zoomControls = (ZoomControls) findViewById(R.id.simpleZoomControl);
zoomControls.show()
g) Name two classes used to play audio and video in Android. 2M
Ans 1) MediaPlayer (Any two

class names
2) MediaController 1 M each)
3) AudioManager
2. Attempt any THREE of the following: 12 M
a) Describe Android architecture with diagram. 4M
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Ans Diagram: 2M
Explanation:
2M
1. Applications:
• The top layer of android architecture is Applications. The native and third party
applications like Contacts, Email, Music, Gallery, Clock, Games, etc. whatever we will
build those will be installed on this layer only.
• The application layer runs within the Android run time using the classes and services
made available from the application framework.
2. Application Framework:
• The Application Framework provides the classes used to create an Android application.
It also provides a generic abstraction for hardware access and manages the user interface
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and application resources.
• It basically provides the services through which we can create the particular class and
make that class helpful for the Applications creation.
• The application framework includes services like telephony service, location services,
notification. manager, NFC service, view system, etc. which we can use for application
development as per our requirements.
3. Android Runtime:
• Android Runtime environment is an important part of Android rather than an internal

part and it contains a components like core libraries and the Dalvik virtual machine.
• The Android run time is the engine that powers our applications along with the libraries
and it forms the basis for the application framework.
(i) Dalvik Virtual Machine (DVM) is a register-based virtual machine like Java Virtual
Machine (JVM).
It is specially designed and optimized for android to ensure that a device can run multiple
instances efficiently. It relies on the Linux kernel for threading and low-level memory
management.
(ii) The core libraries in android runtime will enable us to implement an android
applications using standard JAVA programming language.
4. Platform Libraries:
• The Platform Libraries includes various C/C++ core libraries and Java based libraries
such as SSL, libc, Graphics, SQLite, Webkit, Media, Surface Manger, OpenGL etc. to
provide a support for android development.
• Following are the summary details of some core android libraries available for android
development.
• Media library for playing and recording an audio and video formats
(i) The Surface manager library to provide a display management
(ii) SGL and OpenGL Graphics libraries for 2D and 3D graphics
(iii) SQLite is for database support and FreeType for font support
(iv) Web-Kit for web browser support and SSL for Internet security.
5. Linux Kernel:
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• Linux Kernel is a bottom layer and heart of the android architecture. It is heart of
Android
architecture that exists at the root of android architecture and contains all the low-level
device
drivers for the various hardware components of an Android device.
• Linux Kernel is responsible fro device drivers, power management, memory

management, device management and resource access. It manage all the drivers such as
display drivers, camera drivers,
Bluetooth drivers, audio drivers, memory drivers, etc. which are mainly required for the
android device during the runtime.
• The Linux Kernel will provides an abstraction layer between the device hardware and
the remainder of the stack. It is responsible for memory management, power
management, device management, resource access, etc.
b) Differentiate between DVM and JVM. 4M
Ans Any 4 points

of
DVM (Dalvik Virtual Machine) JVM (Java Virtual Machine) differences :
It is Register based which is designed to run It is Stack based. 1 M each
on low memory.
DVM uses its own byte code and runs the JVM uses java byte code and runs
“.Dex” file. From Android 2.2 SDK Dalvik “.class” file having JIT (Just In Time).
has got a Just in Time compiler
DVM has been designed so that a device A single instance of JVM is shared
can run multiple instances of the VM with multiple applications.
efficiently. Applications are given their own
instance.
DVM supports the Android operating JVM supports multiple operating
system only. systems.
There is a constant pool for every It has a constant pool for every class.
application.
Here the executable is APK. Here the executable is JAR.
c) List and elaborate steps to deploy an Android application on Google play 4M

store.
Ans Steps to deploy and Android Application on Google Play Store: (List 1 M
and
Step 1: Make a Developer Account Elaboration 3
Step 2: Plan to Sell? Link Your Merchant Account M)
Step 3: Create an App
Step 4: Prepare Store Listing
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Step 5: Upload APK to an App Release
Step 6: Provide an Appropriate Content Rating
Step 7: Set Up Pricing & Distribution
Step 8: Rollout Release to Publish Your App
Step 1: Create a Developer Account

Before you can publish any app on Google Play, you need to create a Developer Account.
You can easily sign up for one using your existing Google Account. You’ll need to pay a
one-time registration fee of $25 using your international credit or debit card. It can take
up to 48 hours for your registration to be fully processed.
Step 2: Plan to Sell? Link Your Merchant Account

If you want to publish a paid app or plan to sell in-app purchases, you need to create a
payments center profile, i.e. a merchant account. A merchant account will let you manage
your app sales and monthly payouts, as well as analyze your sales reports right in your
Play Console.

Now you have create an application by clicking on 'Create Application'. Here you have
to select your app’s default language from the drop-down menu and then type in a title
for your app. The title of your app will show on Google Play after you’ve published.

Before you can publish your app, you need to prepare its store listing. These are all the
details that will show up to customers on your app’s listing on Google Play. You not
necessarily complete it at once , you can always save a draft and revisit it later when
you’re ready to publish.
The information required for your store listing is divided into several categories such as
Product Details containing title, short and full description of the app, Your app’s title
and description should be written with a great user experience in mind. Use the right
keywords, but don’t overdo it. Make sure your app doesn’t come across as spam-y or
promotional, or it will risk getting suspended on the Play Store.
Graphic Assets where you can add screenshots, images, videos, promotional graphics,
and icons that showcase your app’s features and functionality.
Languages & Translations, Categorization where in category can be selected to which
your app belong to. Contact Details , Privacy Policy for apps that request access to
sensitive user data or permissions, you need to enter a comprehensive privacy policy that
effectively discloses how your app collects, uses, and shares that data.

Finally upload your app, by uploading APK file. Before you upload APK, you need to
create an app release. You need to select the type of release you want to upload your first
app version to. You can choose between an internal test, a closed test, an open test, and a
production release. The first three releases allow you to test out your app among a select
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group of users before you make it go live for everyone to access.
This is a safer option because you can analyze the test results and optimize or fix your
app accordingly if you need to before rolling it out to all users.
Once you create a production release, your uploaded app version will become accessible
to everyone in the countries you choose to distribute it in and click on ‘Create release.’

If you don’t assign a rating to your app, it will be listed as ‘Unrated’. Apps that are
‘Unrated’ may get removed from Google Play.
To rate your app, you need to fill out a content rating questionnaire An appropriate
content rating will also help you get to the right audience, which will eventually improve
your engagement rates.

Before you can fill out the details required in this step, you need to determine your app’s
monetization strategy. Once you know how your app is going to make money, you can go
ahead and set up your app as free or paid.
You can always change your app from paid to free later, but you cannot change a free app
to paid. For that, you’ll need to create a new app and set its price.

The final step involves reviewing and rolling out your release after making sure you’ve
taken care of everything else.
Before you review and rollout your release, make sure the store listing, content rating,
and pricing and distribution sections of your app each have a green check mark next to
them.
Once you’re sure about the correctness of the details, select your app and navigate to
‘Release management’ – ‘App releases.’ You can always opt for reviews by clicking on
‘Review’ to be taken to the ‘Review and rollout release’ screen. Here, you can see if there
are any issues or warnings you might have missed out on.
Finally, select ‘Confirm rollout.’ This will also publish your app to all users in your target
countries on Google Play.
d) Describe with example, how to create a simple database in SQLite (Assume 4M
suitable data).
(Note : Any other method such as creating subclass of SQLiteOpenHelper class
and overriding and using required methods with relevant example can also be
considered)
Ans This procedure is by openOrCreateDatabase() Description 1
1. The package imported into the application is android.database.sqlite.SQLiteDatabase. M, 1 M for
2. Here the class used is SQLiteDatabase. XML file , 2
3. The method used to create the database or connect to the database is M for Java
openOrCreateDatabse() method. File)
Program:
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<Button
android:text="Create SQLite Database"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="46dp"
android:id="@+id/button" />
</RelativeLayout>
MainActivity.java
package in.edu.vpt.insertusingasync;
import android.app.ProgressDialog;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;;
public class MainActivity extends AppCompatActivity {

SQLiteDatabase sqLiteDatabaseObj;
Button EnterData;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
createData = (Button)findViewById(R.id.button);
createData.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sqLiteDatabaseObj = openOrCreateDatabase("AndroidJSonDataBase",
Context.MODE_PRIVATE, null);
} });
}
a) Write down the steps to install and configure Android studio. 4M
Ans Step 1: Go to https://developer.android.com/android-studio/download to get the Android (4 M for

Studio executable or zip file. appropriate
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Step 2: steps)
● Click on the Download Android Studio Button.
● Click on the “I have read and agree with the above terms and conditions”
checkbox followed by the download button
● Click on the Save file button in the appeared prompt box and the file will start
downloading.
Step 3: After the downloading has finished, open the file from downloads and will
prompt the following dialog box. Click on next. In the next prompt, it’ll ask for a path for
installation. Choose a path and hit next.
Step 4: It will start the installation, and once it is completed, it will be like the image
shown below.
Step 5: Once “Finish” is clicked, it will ask whether the previous settings need to be
imported [if the android studio had been installed earlier], or not. It is better to choose the
‘Don’t import Settings option’. Click the OK button.
Step 6: This will start the Android Studio. Meanwhile, it will be finding the available
SDK components.
Step 7: After it has found the SDK components, it will redirect to the Welcome dialog
box.
Choose Standard and click on Next. Now choose the theme, whether the Light theme or
the Dark one. The light one is called the IntelliJ theme whereas the dark theme is
called Darcula. Choose as required. Click on the Next button.
Step 8: Now it is time to download the SDK components. Click on Finish. Components
begin to download let it complete. The Android Studio has been successfully
configured. Now it’s time to launch and build apps. Click on the Finish button to launch
it.
Step 9: Click on Start a new Android Studio project to build a new app.
b) State syntax to create Text View and Image button with any two attributes of each. 4M
Ans Text View: (Syntax of

Syntax : TextView
<TextView and
android:id="@+id/textView1" ImageButton
android:layout_width="<width value>” : 1 M each
android:layout_height="<height_value>" Any two
android:text="<text to be displayed>"/> appropriate
Attributes/Properties of TextView: attributes of
● id: Supply an identifier name of this view, to later retrieve it with each : 1/2 M
View.findViewByID() or Activity.findViewById() each)
● alpha: alpha property of the view as a value between 0 (entirely transparent) and
1(Completely Opaque). [flag]
● auto link: Controls whether links such as urls and email addresses are
automatically found and converted to clickable links.[flag]
● gravity: The gravity attribute is an optional attribute which is used to control the
alignment of the text like left, right, center, top, bottom, center_vertical,
center_horizontal etc
● text: text attribute is used to set the text in a text view. We can set the text in xml as
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well as in the java class.
● textColor: textColor attribute is used to set the text color of a text view. Color
value is in the form of “#argb”, “#rgb”, “#rrggbb”, or “#aarrggbb”.
● textSize: textSize attribute is used to set the size of text of a text view. We can set
the text size in sp(scale independent pixel) or dp(density pixel).
● textStyle: textStyle attribute is used to set the text style of a text view. The possible
text styles are bold, italic and normal. If we need to use two or more styles for a text
view then “|” operator is used for that.
● background: background attribute is used to set the background of a text view. We
can set a color or a drawable in the background of a text view.
● padding: padding attribute is used to set the padding from left, right, top or bottom.
In above example code of background we also set the 10dp padding from all the
sides of text view.
ImageButton:
Syntax :
<ImageButton
android:id="@+id/imageButton"
android:layout_width="<width value>"
android:layout_height="<height value>"
app:srcCompat="<image source from drawable folder "/>
Attributes/Properties of ImageButton:
● id: id is an attribute used to uniquely identify a image button. Below is the

example code in which we set the id of a image button.
● src: src is an attribute used to set a source file of image or you can say image in
your image button to make your layout look attractive.
● background: background attribute is used to set the background of an image
button. We can set a color or a drawable in the background of a Button.
● padding: padding attribute is used to set the padding from left, right, top or
bottom of the ImageButton.
c) Describe Android service life cycle along with diagram. 4M
Ans ● A service is an application component which runs without direst interaction with (Explanation
the user in the background. 2 M,
● Services are used for repetitive and potentially long running operations, i.e., Diagram
Internet downloads, checking for new data, data processing, updating content 2M)
providers and the like.
● Service can either be started or bound we just need to call either startService() or
bindService() from any of our android components. Based on how our service
was started it will either be “started” or “bound”
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Service Lifecycle
1. Started
a. A service is started when an application component, such as an activity,
starts it by calling startService().
b. Now the service can run in the background indefinitely, even if the
component that started it is destroyed.
2. Bound
a. A service is bound when an application component binds to it by calling
bindService().
b. A bound service offers a client-server interface that allows components to
interact with the service, send requests, get results, and even do so across
processes with InterProcess Communication (IPC).
c. Like any other components service also has callback methods. These will
be invoked while the service is running to inform the application of its
state. Implementing these in our custom service would help you in
performing the right operation in the right state. •
d. There is always only a single instance of service running in the app. If you
are calling startService() for a single service multiple times in our
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application it just invokes the onStartCommand() on that service. Neither
is the service restarted multiple times nor are its multiple instances created
1. onCreate():
This is the first callback which will be invoked when any component starts the
service. If the same service is called again while it is still running this method
wont be invoked. Ideally one time setup and intializing should be done in this
callback.
2. onStartCommand() /startSetvice()
This callback is invoked when service is started by any component by calling
startService(). It basically indicates that the service has started and can now run
indefinetly.
3. onBind()
To provide binding for a service, you must implement the onBind() callback
method. This method returns an IBinder object that defines the programming
interface that clients can use to interact with the service.
4. onUnbind()
This is invoked when all the clients are disconnected from the service.
5. onRebind()
This is invoked when new clients are connected to the service. It is called after
onRebind
6. onDestroy()
This is a final clean up call from the system. This is invoked just before the
service is being destroyed.
d) State and elaborate the syntax of required class and methods for 4M
Geocoding.
Ans Geocoder: (2 M for
explanation
A class for handling geocoding and reverse geocoding.
and syntax of
Geocoding is the process of transforming a street address or other description of a class, 2 M
location into a (latitude, longitude) coordinate. for
explanation
Reverse geocoding is the process of transforming a (latitude, longitude) coordinate into a and syntax of
(partial) address. The amount of detail in a reverse geocoded location description may any two
vary, for example one might contain the full street address of the closest building, while methods)
another might contain only a city name and postal code.
The Geocoder class requires a backend service that is not included in the core android
framework.
The Geocoder query methods will return an empty list if there no backend service in the
platform. Use the isPresent() method to determine whether a Geocoder implementation
exists.
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Syntax
Geocoder (Context context)
Constructs a Geocoder localized for the default locale.
Geocoder(Context context, Locale locale)
Constructs a Geocoder localized for the given locale.
Methods with Syntax

a. getFromLocation
Syntax
public List<Address> getFromLocation (double latitude, double longitude, int

maxResults)
public void getFromLocation (double latitude, double longitude, int maxResults,

Geocoder.GeocodeListener listener)
This method returns an array of Addresses that attempt to describe the area immediately
surrounding the given latitude and longitude. The returned addresses should be localized
for the locale provided to this class's constructor.
b. getFromLocationName
Syntax :
● public List<Address> getFromLocationName (String locationName, int

maxResults, double lowerLeftLatitude, double lowerLeftLongitude, double
upperRightLatitude, double upperRightLongitude)
● public void getFromLocationName (String locationName, int maxResults,
double lowerLeftLatitude, double lowerLeftLongitude, double
upperRightLatitude, double upperRightLongitude, Geocoder.GeocodeListener
listener)
● public void getFromLocationName (String locationName, int maxResults,
Geocoder.GeocodeListener listener)
● public List<Address> getFromLocationName (String locationName, int
maxResults)
Returns an array of Addresses that attempt to describe the named location, which may be
a place name such as "Dalvik, Iceland", an address such as "1600 Amphitheatre Parkway,
Mountain View, CA", an airport code such as "SFO", and so forth. The returned
addresses should be localized for the locale provided to this class's constructor.
c. isPresent
Syntax
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public static boolean isPresent ()
Returns true if there is a geocoder implementation present that may return results. If true,
there is still no guarantee that any individual geocoding attempt will succeed.
a) Explain with example, code to create GUI using absolute layout (Assume 4M
suitable data).
Ans ● AbsoluteLayout is based on the simple idea of placing each control at an absolute (Explanation
position. We specify the exact x and y coordinates on the screen for each control. 2 M,
This is not recommended for most UI development (in fact AbsoluteLayout is Example 2
currently deprecated) since absolutely positioning every element on the screen makes M)
an inflexible UI that is much more difficult to maintain.
Absolute Layout
● An Absolute Layout lets you specify exact locations (x/y coordinates) of its children.
Absolute layouts are less flexible and harder to maintain than other types of layouts
without absolute positioning. AbsoluteLayout is based on the simple idea of placing
each control at an absolute position.
● We specify for the exact x and y corodinates on the screen for every control. So this
recommended for most UI development (in fact Absolute Layout is currentaly
deprecated)since absolute positioning of every element on the screen makes an
inflexible UI that is much more difficult to maintain.
● Consider what happens if a control needs to be added to the user interface UI, we
would have to change the position of every single element that is shifted by the new
control. This allows child views to be positioned at specified X and Y coordinates
within the containing layout view.
Example
(Note :Any other relevant example using absoluteLayout can be considered, No java
code is expected)
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activity_main.xml
<AbsoluteLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="fill_parent">
<TextView
android:layout_x="110px"
android:layout_y="110px"
android:text="User Name"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<EditText
android:width="100px"
android:layout_width="200dp"
<TextView
android:text="Password"
<EditText
android:width="100px"
<Button
android:text="Log In"
android:layout_y="300px"/>
</AbsoluteLayout>
b) Write a program to demonstrate Date and Time picker. 4M

(Note: Consider the appropriate XML file. All attributes are not required.
In java file all imports are not expected. Different relevant logic/code can be
considered.)
Ans activity_main.xml (2M for
<?xml version="1.0" encoding="utf-8"?> correct use
<androidx.constraintlayout.widget.ConstraintLayout of Date
xmlns:android="http://schemas.android.com/apk/res/android" picker
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" 2M for
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android:layout_height="match_parent" correct use
tools:context=".MainActivity"> of
TimePicker)
<TextView
android:id="@+id/tvDate"
android:layout_height="46dp"
android:layout_marginEnd="224dp"
android:layout_marginBottom="312dp"
android:textSize="20dp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<Button
android:id="@+id/btnDate"
android:text="Set Date"
app:layout_constraintEnd_toEndOf="parent"
tools:ignore="DuplicateClickableBoundsCheck" />
<DatePicker
android:id="@+id/dtpcker"
android:datePickerMode="spinner"
app:layout_constraintHorizontal_bias="0.36"
app:layout_constraintStart_toStartOf="parent" />
<TimePicker
android:id="@+id/timepcker"
android:timePickerMode="spinner"
<TextView
android:id="@+id/tvTime"
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<Button
android:id="@+id/btnTime"
android:text="Set Time"
</androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package com.example.datepickereg;
import androidx.appcompat.app.AppCompatActivity;
import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.TimePicker;
import java.util.Calendar;

TextView tvDate,tvTime;
DatePicker dtpcker;
TimePicker timepcker;
Button b1,b2;
@Override
tvDate=findViewById(R.id.tvDate);
tvTime=findViewById(R.id.tvTime);
b1=findViewById(R.id.btnDate);
b2=findViewById(R.id.btnTime);
dtpcker=findViewById(R.id.dtpcker);
timepcker=findViewById(R.id.timepcker);
b1.setOnClickListener(new View.OnClickListener() {
@Override
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tvDate.setText("Date : "+dtpcker.getDayOfMonth()+"-
"+dtpcker.getMonth()+"-"+dtpcker.getYear());
}
});
@Override
tvTime.setText(timepcker.getCurrentHour()+":"+timepcker.getCurrentMinute());
}
});
}
}
c) Describe multimedia framework of Android with diagram. 4M
Ans ● The android multimedia system includes multimedia applications, multimedia (Explanation
frameworks, OpenCore engine and hardware abstract for audio/video input/output 2M,
devices. And the goal of the android multimedia framework is to provide a
reliable interface for java services. The multimedia framework consists of several Diagram 2
core dynamic libraries such as libmediajni, libmedia, libmediaplayservice and so M)
on.
● Java classes call the Native C library Libmedia through Java JNI(Java Native
Interface). Libmedia library communications with Media Server guard process
through Android’s Binder IPc (inter process communication) mechanism.
● Media Server process creates the corresponding multimedia service according to
the Java multimedia applications.
● The whole communication between Libmedia and Media Server forms a
Client/Server model
Android Multimedia Framework Architecture
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● Typical video/audio data stream works in Android as follows. Particularly, Java
applications first set the URI of the media (from file or network) to PVPlayer
through Java framework, JNI and Native C. In this process, there are no data
stream flows.
● Then PVPlayer processes the media data stream with the steps: demux the media
data to separate video/audio data stream, decode video/audio data, sync
video.audio time, send the decoded data out.
● The below is the description of media codec/format, container and network
protocol supported by the Android platform.
1. Container: The audio file format is a file for storing digital audio data on
a system. This data can be manipulated to reduce the size or change the
quality of the audio. It is a kind of container to store audio information.
2. Audio Format: Any format or codec can be used including the ones
provided by Android or those which are specific devices. However it is
recommended to use the specified file formats as per devices.
3. Network Protocol: Protocols such as RTSP, HTTP,HTTPS are supported
in audio and video playback.
d) Discuss developer console with at least four features 4M
Ans ● Google Play Developer Console is the platform that Google provides for Google (Any 4
Play and Android developers to publish their apps. relevant
● The Google Play Developer console allows app developers and marketers to features 1M
better understand how their apps are performing in terms of growth, technical each )
performance such as crashes or display issues, and financials.
● The console offers acquisition reports and detailed analysis which can help app
devs find out how well an app is really performing.
● The platform is important as it provides developers with access to first party data
(trustworthy information collected about an app’s audience that comes straight
from Google Play) that highlights the real performance of an app.
● It shows the number of impressions an app listing receives and the number of
Installs an app receives from different sources over time.
e) Write a program to demonstrate declaring and using permissions with any 4M

relevant example.
Ans Permission declaring : 4 M for any
correct
The permissions are declared in AndroidManifest.xml file under Manifest folder. program
Permission can be set by <uses-permission> tag in AndroidManifest.xml.
demonstratin
Example:
Following example is to send SMS. g declaration
(Note: Any other relevant example which uses permissions can be considered) and use of
permissions
AndroidManifest.xml
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<uses-permission android:name="android.permission.SEND_SMS"/>
activity_main.xml
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
<TextView
android:id="@+id/textView"
android:text="To :"
app:layout_constraintEnd_toEndOf="parent"/>
<TextView
android:id="@+id/textView2"
android:text="Sms Text"
<EditText
android:id="@+id/etPhno"
android:ems="10"
android:inputType="textPersonName"
<EditText
android:id="@+id/etmsg"
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tools:ignore="SpeakableTextPresentCheck" />
<Button
android:id="@+id/btnSms"
android:text="SEND SMS"
MainActivity.java
package com.example.testreceivesms;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.telephony.SmsManager;
import android.widget.EditText;
import android.widget.Toast;

EditText et1,et2;
Button b1;
@Override
et1=findViewById(R.id.etPhno);
et2=findViewById(R.id.etmsg);
b1=findViewById(R.id.btnSms);
if(ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.SEN
D_SMS)!=
PackageManager.PERMISSION_GRANTED)
{
ActivityCompat.requestPermissions(MainActivity.this,new
String[]{Manifest.permission.SEND_SMS},100);
}
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@Override
public void onClick(View v) {
try {
String phno= et1.getText().toString();
String msg=et2.getText().toString();
SmsManager smsManager= SmsManager.getDefault();
smsManager.sendTextMessage(phno,null,msg,null,null);
Toast.makeText(MainActivity.this,"Sms sent successfully",
Toast.LENGTH_LONG).show();
}
catch(Exception e)
{
Toast.makeText(MainActivity.this,"Sms failed to send... try again",
}
}
});
}
}
5. Attempt any TWO of the following: 12 M
a) Write a program to convert temperature from celcius to farenhite and vice versa 6M
using Toggle button. (Design UI as per your choice. Write XML and java file)
considered.)
Ans activity_main.xml XML file:
<?xml version="1.0" encoding="utf-8"?> 2M
Java Code:
4M
<EditText
android:id="@+id/edittext"
android:hint="Enter the temp"/>
<ToggleButton
android:id="@+id/togglebutton"
android:layout_below="@+id/edittext"
android:textOff="F to C"
android:textOn="C to F" />
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<Button
android:id="@+id/button"
android:layout_below="@id/togglebutton"
android:layout_marginTop="56dp" />
</RelativeLayout>
MainActivity.java
package com.example.p1;
import android.widget.ToggleButton;

Button b1;
EditText et;
ToggleButton tb;
Double a;
@Override
et=findViewById(R.id.edittext);
b1=findViewById(R.id.button);
tb=findViewById(R.id.togglebutton);
@Override
if(tb.isChecked())
{
a=Double.parseDouble(String.valueOf(et.getText()));
Double b=a*9/5+32;
String r=String.valueOf(b);
Toast.makeText(MainActivity.this,r+"°F",Toast.LENGTH_SHORT).show();
}
else
{
a=Double.parseDouble(String.valueOf(et.getText()));
Double b=a-32;
Double c=b*5/9;
String r=String.valueOf(c);
Toast.makeText(MainActivity.this,r+"°C",Toast.LENGTH_SHORT).show();
}
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}
});
}
}
b) Write a program to capture an image using camera and display it. 6M

considered.)
2M
xmlns:tools="http://schemas.android.com/tools" Java Code:
android:layout_width="match_parent" 4M
android:padding="40dp"
android:orientation="horizontal"
<TextView
android:text="CAMERA"
android:id="@+id/text"
android:gravity="center"/>
<ImageView
android:id="@+id/image"
android:layout_below="@+id/text"
android:src="@drawable/rose"/>
<Button
android:id="@+id/photo"
android:layout_below="@+id/image"
android:text="TAKE PHOTO" />
</RelativeLayout>
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MainActivity.java
package com.example.ifcdiv;
import android.content.Intent;
import android.graphics.Bitmap;
import android.provider.MediaStore;
import android.widget.ImageView;

Button b1;
ImageView imageView;
int CAMERA_REQUEST=1;
@Override
b1=findViewById(R.id.photo);
imageView=findViewById(R.id.image);
@Override
Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

startActivityForResult(i,CAMERA_REQUEST);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent
data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode==CAMERA_REQUEST)
{
Bitmap image= (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(image);
}
}
}
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c) Develop and application to send and receive SMS (Design minimal UI as per 6M
your choice. Write XML, java and manifest file)
(Note: Consider appropriate XML file. All attributes are not required. In java
file all imports are not expected. Different relevant login/code can be considered.
Statements showing permissions can be written under AndroidManifest.xml)
Ans Permissions and <receiver> tag required in AndroidManifest.xml XML file:
<uses-permission android:name="android.permission.RECEIVE_SMS" /> 1M
<uses-permission android:name="android.permission.READ_SMS"/> Manifest
<uses-permission android:name="android.permission.WRITE_SMS"/> File:1M
Java Code:
<receiver
4M
android:name=".SmsReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
</intent-filter>
</receiver>
activity_main.xml
<androidx.constraintlayout.widget.ConstraintLayout
<TextView
android:text="To :"
app:layout_constraintEnd_toEndOf="parent"/>
<TextView
android:text="Sms Text"
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<EditText
android:id="@+id/etPhno"
android:ems="10"
<EditText
android:id="@+id/etmsg"
tools:ignore="SpeakableTextPresentCheck" />
<Button
android:id="@+id/btnSms"
android:text="SEND SMS"
MainActivity.java
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__________________________________________________________________________________________________
SmsReceiver sms= new SmsReceiver();
EditText et1,et2;
Button b1;
@Override
if(ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.SEN
D_SMS)!=
{
}
@Override
try {
}
catch(Exception e)
{
}
}
});
}
@Override
protected void onStart() {
super.onStart();
IntentFilter filter=new
IntentFilter("android.provider.Telephony.SMS_RECEIVED");
registerReceiver(sms,filter);
}
@Override
protected void onStop() {
super.onStop();
unregisterReceiver(sms);
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}
}
SmsReceiver.java
import android.content.BroadcastReceiver;
import android.telephony.SmsMessage;
public class SmsReceiver extends BroadcastReceiver {

SmsReceiver(){}
@Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
if (bundle != null) {
// Retrieve the SMS Messages received
Object[] sms = (Object[]) bundle.get("pdus");
// For every SMS message received

for (int i=0; i < sms.length; i++) {
// Convert Object array
SmsMessage smsMessage = SmsMessage.createFromPdu((byte[]) sms[i]);
String phone = smsMessage.getOriginatingAddress();

String message = smsMessage.getMessageBody().toString();
Toast.makeText(context, “Received from “+ phone + ": " + message,

Toast.LENGTH_SHORT).show();
}
}
}
}
a) Write a program to implement Android Activity Life Cycle. Use toast messages 6M
to display message through life cycle.
(Note: No XML code is required. In java file all imports are not expected.)
Ans package com.example.p1; Use of any 6
import androidx.appcompat.app.AppCompatActivity; methods of
import android.os.Bundle; Activity life
import android.widget.Toast; cycle : 1 M
public class MainActivity extends AppCompatActivity { each
@Override
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__________________________________________________________________________________________________
Toast.makeText(getApplicationContext(),"Activity
created",Toast.LENGTH_LONG).show();
}
@Override
super.onStart();
Started",Toast.LENGTH_LONG).show();
}
@Override
super.onStop();
Stop",Toast.LENGTH_LONG).show();
}
@Override
protected void onDestroy() {
super.onDestroy();
Destroy",Toast.LENGTH_LONG).show();
}
@Override
protected void onPause() {
super.onPause();
Pause",Toast.LENGTH_LONG).show();
}
@Override
protected void onRestart() {
super.onResume();
Restart",Toast.LENGTH_LONG).show();
@Override
protected void onResume() {
super.onResume();
Resume",Toast.LENGTH_LONG).show();
}
}
b) Develop an application to display Google map with user's current location. 6M
(Note : Consider the appropriate XML file. All attributes are not required.
Page No: 32 | 39
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__________________________________________________________________________________________________
considered.)
Ans act ivity_main.xml XML file:
xmlns:tools="http://schemas.android.com/tools" Java Code:
<fragment
android:id="@+id/google_map"
android:name="com.google.android.gms.maps.SupportMapFragment" />
</RelativeLayout>
MainActivity.Java
package com.example.location;
import androidx.annotation.NonNull;
import androidx.fragment.app.FragmentActivity;
import android.location.Location;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
public class MainActivity extends FragmentActivity implements OnMapReadyCallback

{
Location currentlocation;
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FusedLocationProviderClient fusedLocationProviderClient;
private static final int REQUEST_CODE = 101;
@Override
fusedLocationProviderClient =
LocationServices.getFusedLocationProviderClient(this);
fetchLastLocation();
}
private void fetchLastLocation() {
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) !=
PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_COARSE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,new
String[]{Manifest.permission.ACCESS_FINE_LOCATION},REQUEST_CODE);
return;
}
Task<Location> task = fusedLocationProviderClient.getLastLocation();
task.addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
if(location!=null)
{
currentlocation=location;
Toast.makeText(getApplicationContext(),currentlocation.getLatitude()+""+current
location.getLongitude(), Toast.LENGTH_SHORT).show();
SupportMapFragment supportMapFragment =
(SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.go
ogle_map);
supportMapFragment.getMapAsync(MainActivity.this);
}
}
});
}
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@Override
public void onMapReady(@NonNull GoogleMap googleMap) {
LatLng latLng=new
LatLng(currentlocation.getLatitude(),currentlocation.getLongitude());
MarkerOptions markerOptions=new MarkerOptions().position(latLng)
.title("I am Here");
googleMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
googleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,5));
googleMap.addMarker(markerOptions);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[]
permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case REQUEST_CODE:
if (grantResults.length > 0 && grantResults[0] ==
fetchLastLocation();
}
break;
}
}
}
c) Design UI using table layout to display buttons with 0 9 numbers on it. Even display 6M
submit and clear button. When user clicks on particular buttons and later when
clicks on submit button, it should display the numbers clicked.
considered.)
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
Java Code:
3M
android:stretchColumns="*"
<TableRow
android:layout_height="wrap_content">
<Button
Page No: 35 | 39
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__________________________________________________________________________________________________
android:id="@+id/button0"
android:text="0"/>
<Button
android:text="1"/>
<Button
android:text="2" />
</TableRow>
<TableRow
<Button
android:text="3"/>
<Button
android:text="4"/>
<Button
android:text="5"
android:id="@+id/button5"/>
</TableRow>
<TableRow
<Button
android:text="6"
<Button
android:text="7"
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<Button
android:text="8"
</TableRow>
<TableRow
<Button
android:text="9"
<Button
android:text="Submit"
android:id="@+id/submit"/>
<Button
android:text="Clear"
android:id="@+id/clear"/>
</TableRow>
</TableLayout>
(Java File)
package com.example.p1;

Button button0, button1, button2, button3, button4, button5, button6,button7,
button8, button9,submit,clear;
String a=null;
@Override
button0 = (Button) findViewById(R.id.button0);
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submit=(Button) findViewById(R.id.submit);
clear=(Button) findViewById(R.id.clear);
button0.setOnClickListener(new View.OnClickListener() {
@Override
a=button0.getText().toString();
}
});
@Override
}
});
@Override
}
});
@Override
}
});
@Override
}
});
@Override
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__________________________________________________________________________________________________
}
});
@Override
}
});
@Override
}
});
@Override
}
});
@Override
}
});
submit.setOnClickListener(new View.OnClickListener() {
@Override
Toast.makeText(getApplicationContext(),a,Toast.LENGTH_LONG).show(); }
});
}
}
Page No: 39 | 39
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__________________________________________________________________________________________________
WINTER – 2022 EXAMINATION
Subject Name Mobile Application Development Model Answer Subject Code: 22617
1) The answers should be examined by key words and not as word-to-word as given in the model answer
scheme.
3) The language errors such as grammatical, spelling errors should not be given more Importance (Not
applicable for subject English and Communication Skills.
4) While assessing figures, examiner may give credit for principal components indicated in the figure. The
figures drawn by candidate and model answer may vary. The examiner may give credit for any equivalent
figure drawn.
5) Credits may be given step wise for numerical problems. In some cases, the assumed constant values may
vary and there may be some difference in the candidate’s answers and model answer.
6) In case of some questions credit may be given by judgement on part of examiner of relevant answer based
on candidate’s understanding.
8) As per the policy decision of Maharashtra State Government, teaching in English/Marathi and Bilingual
(English + Marathi) medium is introduced at first year of AICTE diploma Programme from academic year
2021-2022. Hence if the students in first year (first and second semesters) write answers in Marathi or
bilingual language (English +Marathi), the Examiner shall consider the same and assess the answer based
on matching of concepts with model answer.
Q. Sub Note: As Android programs contain many of the auto generated code statements from IDE, Marking
No. Q. while assessing such answers correct logical steps taken to obtain the required output can be Scheme
N. considered.
Answer
a) Define OHA and state goal of OHA. 2M
Ans The OHA is the group that is in charge of the Android smartphones operating system. It was (Define : 1
created by Google. The Open Handset Alliance (OHA) is consortium of multiple companies M, Stating
like Samsung, Sony, Intel and many more to provide services and deploy handsets using goal 1 M)
android platform.
The Open Handset Alliance (OHA) is an association whose goal is to develop open standards
for mobile devices, promote innovation in mobile phones and provide a better experience for
consumers at a lower cost.
b) Define Android Virtual Devices (AVD). 2M
Ans An Android Virtual Device (AVD) is a configuration that defines the characteristics of an (Define : 2
Android phone, tablet, Wear OS, Android TV, or Automotive OS device that you want to M ,any valid
simulate in the Android Emulator. The AVD Manager is an interface you can launch from definition
Android Studio that helps you create and manage AVDs. should be
considered)
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c) State how the APK files are built? 2M
Ans  The javac compiler compiles the java source file into the class file. (For each
 The dx tool takes all the class files of your application and generates a single .dex file which step 1/2 M)
is a platform specific tool.
 Then Android Assets Packaging Tool (aapt) handles the packaging process and finally
creates an executable file with extension .apk.
 An APK file contains all of a program's code (such as .dex files), resources, assets,
certificates, and manifest file.
d) Enlist the elements of UI. 2M
Ans Elements of UI. (1/2 mark

for each UI
 EditText element,
 TextView any 4 UI
elements
 ListView
expected)
 GridView
 ScrollView
 ImageView
 ToggleButton
 CheckBox
 RadioButton
OR
Components of UI
 Menu Bar
 Toolbar
 Navigation Bar
 Editor Tabs
 Editor
 Project Explorer
 Status Bar
 Tool Buttons
e) State the uses of Intent in Android. 2M
Ans An Intent is a messaging object you can use to request an action from another app component. (1 M for
Intents are used for facilitating communication between components like Activities, Services each use, 2
and Broadcast Receivers. uses
expected)
f) Name any four methods to get location data in android. 2M
Ans •float distanceTo(Location dest) (1/2 M for

•float getAccuracy() each
•float getBearing() method,
Page No: 2 | 41
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•double getAltitude() any 4
•double getLatitude() methods
•float getSpeed() expected)
•boolean hasAccuracy()
•boolean hasAltitude()
•boolean hasBearing()
•boolean hasBearing()
•boolean hasSpeed()
•void reset()
•void setAccuracy(float accuracy)
•void setAltitude(double altitude)
g) Explain significance of content provider. 2M
Ans Content Providers are used to share data between two applications. This can be implemented (1 M for
in two ways: each
1. When you want to implement the existing content provider in another application. significance
2. When you want to create a new content provider that can share its data with other ,
Applications
a) Describe the different features of Android. 4M
Ans User Interface: The user interface of the Android operating system is straight forward, and (1 M for
these features make it very user friendly. each
feature, 4
Multiple Language Support: Android supports multiple languages in its operating system and features
one can change the language very easily based on one’s requirement, the International expected)
languages supported are English, Germany, Chinese, Dutch, French, German, Japanese,
Korean, Russian, and many more also some native language of India is also Supported Like
Hindi, Marathi, Gujarati, Punjabi and many more.
Multi-tasking: Android provides support to run apps and services in the background with ease
which allows the users to use multiple apps at the same time.
Connectivity: Android has extensive support to the connectivity and it supports connectivity
such as WiFi, Bluetooth, Hotspot, CDMA, GSM, NFC, VOLTE, UBB, VPN, 3G network
band, and 4G Network Band.
Extensive Application Support: Android have Play store which is used as the major tool to
download and update applications on the operating system, however, one can download the
installer(often called as APK file) and install it manually, but it is not much recommended as
third party applications could be prone to some security breach in the smartphones.
b) Explain features of Android SDK. 4M
Ans Android SDK is a collection of libraries and Software Development tools that are essential for (1 M for
Developing Android Applications. Whenever Google releases a new version or update of each
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Android Software, a corresponding SDK also releases with it. In the updated or new version of feature, any
SDK, some more features are included which are not present in the previous version. Android 4 features
SDK consists of some tools which are very essential for the development of Android expected)
Application. These tools provide a smooth flow of the development process from developing
and debugging. Android SDK is compatible with all operating systems such as Windows,
Linux, macOS, etc.
1. Android Tool: This tool helps in managing the Android Virtual Device projects as well as
the installed components of the software development kit.
2. Emulator Tool: It helps us in testing the applications without the need of using the
application on an actual device.
3. Dalvik Debug Monitor Server(DDMS): DDMS is very useful for debugging the Android
Application.
4. Android Debug Bridge (ADB): It is a very versatile command-line tool and is helpful for
the communication between the developer and the Emulator or the Android device that is
connected.
c) Explain the Android security model. 4M
Ans The Android security model is primarily based on a sandbox and permission mechanism. Each 2 M for
application is running in a specific Dalvik virtual machine with a unique user ID assigned to it, explanation
which means the application code runs in isolation from the code of all other applications. , 2 M for
Therefore, one application has not granted access to other applications’ files. explaining
permissions
Android application has been signed with a certificate with a private key Know the owner of , any 2
the application is unique. This allows the author of the application will be identified if needed. permissions
When an application is installed in the phone is assigned a user ID, thus avoiding it from expected)
affecting it other applications by creating a sandbox for it. This user ID is permanent on which
devices and applications with the same user ID are allowed to run in a single process. This is a
way to ensure that a malicious application has Cannot access / compromise the data of the
genuine application. It is mandatory for an application to list all the resources it will Access
during installation. Terms are required of an application, in the installation process should be
user-based or interactive Check with the signature of the application.
Declaring and Using Permissions
The purpose of a permission is to protect the privacy of an Android user. Android apps must
request permission to access sensitive user data (such as contacts and SMS), as well as certain
system features (such as camera and internet). Depending on the feature, the system might grant
the permission automatically or might prompt the user to approve the request.
Permissions are divided into several protection levels. The protection level affects whether
runtime permission requests are required. There are three protection levels that affect third-
party apps: normal, signature, and dangerous permissions.
Normal permissions: Normal permissions cover areas where your app needs to access data or
resources outside the app’s sandbox, but where there’s very little risk to the user’s privacy or
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the operation of other apps. For example, permission to set the time zone is a normal
permission. If an app declares in its manifest that it needs a normal permission, the system
automatically grants the app that permission at install time. The system doesn’t prompt the user
to grant normal permissions, and users cannot revoke these permissions.
Signature permissions: The system grants these app permissions at install time, but only when
the app that attempts to use permission is signed by the same certificate as the app that defines
the permission.
Dangerous permissions: Dangerous permissions cover areas where the app wants data or
resources that involve the user’s private information, or could potentially affect the user’s
stored data or the operation of other apps. For example, the ability to read the user’s contacts is
a dangerous permission. If an app declares that it needs a dangerous permission, the user must
explicitly grant the permission to the app. Until the user approves the permission, your app
cannot provide functionality that depends on that permission. To use a dangerous permission,
your app must prompt the user to grant permission at runtime. For more details about how the
user is prompted, see Request prompt for dangerous permission.
d) Elaborate the need of permissions in Android. Explain the permissions to set 4M
system functionalitics like SEND-SMS, bluetooth.
Ans The purpose of a permission is to protect the privacy of an Android user. Android apps must(2 M for
request permission to access sensitive user data (such as contacts and SMS), as well as certain
explanation
system features (such as camera and internet). Depending on the feature, the system might grant
of need, 1
the permission automatically or might prompt the user to approve the request. M each for
explaining
 android. permission. SEND_SMS permissions
Allows the app to send SMS messages. This may result in unexpected charges. of Sms and
Malicious apps may cost you money by sending messages without your confirmation. bluetooth)
Following is the code snippet to set SEND_SMS permissions in manifest file.

<uses-permission android: name="android.permission.SEND_SMS"/>
 android. permission. BLUETOOTH

You need to provide following permissions in AndroidManifest.xml file.
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
a) Explain data and time picker with its method. 4M
Ans Date Picker: Date picker

In Android, DatePicker is a widget used to select a date. It allows to select date by day, month (any two
and year in our custom UI (user interface). If we need to show this view as a dialog then we methods) 2
have to use a DatePickerDialog class. M and time
Methods of DatePicker:
picker (any
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1. setSpinnersShown(boolean shown): This method is used to set whether the spinner of the two
date picker in shown or not. In this method you have to set a Boolean value either true or false. methods) 2
True indicates spinner is shown, false value indicates spinner is not shown. Default value for M
this function is true.
Syntax:
DatePicker simpleDatePicker = (DatePicker)findViewById(R.id.simpleDatePicker);
simpleDatePicker.setSpinnersShown(false);
2. getDayOfMonth(): This method is used to get the selected day of the month from a date
picker.
This method returns an integer value.
DatePicker simpleDatePicker = (DatePicker) findViewById(R.id.simpleDatePicker);
int day = simpleDatePicker.getDayOfMonth();
3. getMonth(): This method is used to get the selected month from a date picker. This method
returns an integer value.
int month = simpleDatePicker.getMonth();
4. getYear(): This method is used to get the selected year from a date picker. This method
int year = simpleDatePicker.getYear();
5. getFirstDayOfWeek(): This method is used to get the first day of the week. This method
int firstDay=simpleDatePicker.getFirstDayOfWeek();
TimePicker:
In Android, TimePicker is a widget used for selecting the time of the day in either AM/PM
mode or 24 hours mode. The displayed time consist of hours, minutes and clock format. If we
need to show this view as a Dialog then we have to use a TimePickerDialog class.
Methods of TimePicker:
1. setCurrentHour(Integer currentHour): This method is used to set the current hours in a
time picker.
setHour(Integer hour): setCurrentHour() method was deprecated in API level 23. From api
level 23 we have to use setHour(Integer hour). In this method there is only one parameter of
integer type which is used to set the value for hours.
TimePicker simpleTimePicker=(TimePicker)findViewById(R.id.simpleTimePicker);
simpleTimePicker.setCurrentHour(5);
simpleTimePicker.setHour(5);
2. setCurrentMinute(Integer currentMinute): This method is used to set the current minutes
in a time picker. setMinute(Integer minute): setCurrentMinute() method was deprecated in API
level 23. From api level 23 we have to use setMinute(Integer minute). In this method there is
only one parameter of integer type which set the value for minutes.
TimePicker simpleTimePicker=(TimePicker)findViewById(R.id.simpleTimePicker);
simpleTimePicker.setCurrentMinute(35);
simpleTimePicker.setMinute(35);
4. getCurrentMinute(): This method is used to get the current minutes from a time picker.
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getMinute(): getCurrentMinute() method was deprecated in API level 23. From api level 23
we have to use getMinute(). This method returns an integer value.
TimePicker simpleTimePicker = (TimePicker)findViewById(R.id.simpleTimePicker);
int minutes = simpleTimePicker.getCurrentMinute();
int minutes = simpleTimePicker.getMinute();
5. setIs24HourView(Boolean is24HourView): This method is used to set the mode of the
Time picker either 24 hour mode or AM/PM mode. In this method we set a Boolean value
either true or false. True value indicate 24 hour mode and false value indicate AM/PM mode.
simpleTimePicker.setIs24HourView(true);
6. is24HourView(): This method is used to check the current mode of the time picker. This
method returns true if its 24 hour mode or false if AM/PM mode is set.
Boolean mode=simpleTimePicker.is24HourView();
7.setOnTimeChangedListener(TimePicker.OnTimeChangedListener
onTimeChanged(): This method is used to set the callback that indicates the time has been
adjusted by the user.
onTimeChanged(TimePicker view, int hourOfDay, int minute) is an override function of this
listener in which we have three parameters first is for TimePicker, second for getting hour of
the day and last is for getting the minutes after changing the time of the time picker.
simpleTimePicker.setOnTimeChangedListener(new TimePicker.OnTimeChangedListener() {
@Override
public void onTimeChanged(TimePicker view, int hourOfDay, int minute) {
}
});
b) Explain the steps to install and configure Android studio and SDK. 4M
Ans  Download the latest version of Android Studio from above URL and launch Android 4 M for
Studio.exe file by double clicking on it. steps
 The initial android studio setup screen will open in that click Next to continue for further
steps of environment setup
 Now we need to select a required components to setup an android environment. Here
we selected all three components (Android Studio, Android SDK and Android Virtual
Device) and click Next.
 Now we need to agree the License agreements to proceed further, click on I Agree
button
 Now we need to specify the local machine drive location to install Android Studio and
Android SDK.
 After selecting the location path to install required components, click Next.
 Now select the start menu folder to create a shortcut for android studio and click Install
 Once we click Install button the installation process will start and click Next after
completion of Installation.
 After that it will show installation completion wizard in that click Finish to launch
android studio While launching Android Studio it will give you an option to import
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settings from previous version of studio. In case if you don’t have any previous version,
select second option and click OK
 Now android studio will open a welcome wizard window in that click Next to validate
our current Android SDK and development environment setup
 Now select a Standard installation type and click Next to install a common settings and
options
 Now verify settings and click Finish to complete android studio setup process
 After completion of required components installation click on Finish
 After completion of all required components installation, we will be able to see Android
Studio welcome window
c) Explain the activity life cycle. 4M
Ans Diagram 2
M
explanation
2M
Activities have a predefined life-cycle methods as follows:
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onCreate (): Called then the activity is created. Used to initialize the activity, for
example create the user interface.
onStart ():called when activity is becoming visible to the user.
onResume (): Called if the activity get visible again and the user starts interacting
with the activity again. Used to initialize fields, register listeners, bind
to services, etc.
onPause (): Called once another activity gets into the foreground. Always called
before the activity is not visible anymore. Used to release resources or
save application data. For example you unregister listeners, intent
receivers, unbind from services or remove system service listeners.
onStop (): Called once the activity is no longer visible. Time or CPU intensive shutdown
operations, such as writing information to a database should be down in the onStop() method.
This method is guaranteed to be called as
of API 11.
onDestroy (): called before the activity is destroyed.
d) Explain the steps to deploy app on Google Play Store. 4M
Ans Step 1: Create a Developer Account 4 M for all

Before you can publish any app on Google Play, you need to create a Developer Account. You steps
can easily sign up for one using your existing Google Account. You’ll need to pay a one-time
registration fee of $25 using your international credit or debit card. It can take up to 48 hours
for your registration to be fully processed.

If you want to publish a paid app or plan to sell in-app purchases, you need to create a payments
center profile, i.e. a merchant account. A merchant account will let you manage your app sales
and monthly payouts, as well as analyze your sales reports right in your Play Console.

After creating application by clicking on ‘Create Application'. Here you have to select your
app’s default language from the drop-down menu and then type in a title for your app. The title
of your app will show on Google Play after you’ve published.

Before you can publish your app, you need to prepare its store listing. These are all the details
that will show up to customers on your app’s listing on Google Play. You not necessarily
complete it at once, you can always save a draft and revisit it later when you’re ready to publish.
Product Details containing title, short and full description of the app, your app’s title and
description should be written with a great user experience in mind. Use the right keywords, but
don’t overdo it. Make sure your app doesn’t come across as spam-y or promotional, or it will
risk getting suspended on the Play Store.
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Graphic Assets where you can add screenshots, images, videos, promotional graphics, and
icons that showcase your app’s features and functionality.
Languages & Translations, Categorization where in category can be selected to which your
app belong to. Contact Details, Privacy Policy for apps that request access to sensitive user
data or permissions, you need to enter a comprehensive privacy policy that effectively discloses
how your app collects, uses, and shares that data.

Finally upload your app, by uploading APK file. Before you upload APK, you need to create
an app release. You need to select the type of release you want to upload your first app version
to. You can choose between an internal test, a closed test, an open test, and a production release.
The first three releases allow you to test out your app among a select group of users before you
make it go live for everyone to access.
This is a safer option because you can analyze the test results and optimize or fix your app
accordingly if you need to before rolling it out to all users.
Once you create a production release, your uploaded app version will become accessible to
everyone in the countries you choose to distribute it in and click on ‘Create release.’

If you don’t assign a rating to your app, it will be listed as ‘Unrated’. Apps that are ‘Unrated’
may get removed from Google Play.
To rate your app, you need to fill out a content rating questionnaire An appropriate content
rating will also help you get to the right audience, which will eventually improve your
engagement rates.

monetization strategy. Once you know how your app is going to make money, you can go ahead
and set up your app as free or paid.
You can always change your app from paid to free later, but you cannot change a free app to
paid. For that, you’ll need to create a new app and set its price.

The final step involves reviewing and rolling out your release after making sure you’ve taken
care of everything else.
Before you review and rollout your release, make sure the store listing, content rating, and
pricing and distribution sections of your app each have a green check mark next to them.
Once you’re sure about the correctness of the details, select your app and navigate to ‘Release
management’ – ‘App releases.’ You can always opt for reviews by clicking on ‘Review’ to be
taken to the ‘Review and rollout release’ screen. Here, you can see if there are any issues or
warnings you might have missed out on.
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a) Explain the fundamentals of Ul design in detail. 4M
Ans 1. Views: 1 M for

• The basic building block for user interface in Android is a View, which is created from the each
View class and occupies a rectangular area on the screen and is responsible for drawing and
event handling.
• Views are the base class for all visual interface elements (commonly known as controls or
widgets). All user interface UI controls, including the layout classes, are derived from View.
• A View is an object/widget that draws something on the sreen by the help of user interact.
• Examples of widgets are buttons, text boxes, labels etc.
2. View Groups:
• The ViewGroup is a subclass of View and provides invisible container that hold other Views
or other ViewGroups and define their layout properties.
• View groups are extensions of the View class that can contain multiple child Views. In order
to Extend the ViewGroup class to create compound controls made up of interconnected child
views.
• A ViewGroup provides the layout in which we can order the appearance and sequence of
views.
Examples of ViewGroup are FrmaeLayout, LineourLayout etc.
3. Fragments:
• Fragments represents a portion of user interface in an Activity. Fragments, introduced in
Android 3.0 which uses API level 11, are used to encapsulate portions of your UI. This
encapsulation makes fragments particularly useful when optimizing our UI layouts for different
screen sizes and creating reusable user interface (UI) elements.
• Each Fragment includes its own user interface (UI) layout and receives the related input events
but is tightly bound to the activity into which each must be embedded. Fragments are similar
to UI view controller in iPhone development.
4. Activities:
• Activities dictate the UI and handle the user interaction to the smart phone screen. Activities
represent a single screen that user interact.
• Activities are the Android equivalent of Forms in traditional windows desktop development.
To display a UI we assign a View (Usually a layout or Fragment) to an Activity
b) Write a program to display a rectangular progress bar. 4M
Ans Xml File: xml file

<?xml version="1.0" encoding="utf-8"?> 2M,
xmlns:tools="http://schemas.android.com/tools" java file 2
android:layout_width="match_parent" M
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<ProgressBar
android:id="@+id/progressBar"
style="@android:style/Widget.ProgressBar.Horizontal"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:indeterminate="false"
android:max="100"
android:minHeight="50dp"
android:minWidth="200dp"
android:progress="1" />
<TextView
android:layout_alignLeft="@+id/progressBar"
android:layout_below="@+id/progressBar"/>
</RelativeLayout>
Java file:
package in.edu.vpt.progressbar;
import android.os.Handler;
import android.os.Looper;
import android.widget.ProgressBar;
private ProgressBar progressBar;
private int progressStatus = 0;
private TextView textView;
@Override
progressBar = (ProgressBar) findViewById(R.id.progressBar);
textView = (TextView) findViewById(R.id.textView);
// Start long running operation in a background thread
new Thread(new Runnable() {
public void run() {
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while (progressStatus < 100) {
progressStatus += 1;
new Handler(Looper.getMainLooper()).post(new Runnable() {
public void run() {
progressBar.setProgress(progressStatus);
textView.setText(progressStatus+"/"+progressBar.getMax());
}
});
try {
// Sleep for 200 milliseconds.
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}
}
c) Explain Android system architecture in detail. 4M
Ans Diagram
2 M,
Explanation
2M
1. Applications:
• The top layer of android architecture is Applications. The native and third party applications
like Contacts, Email, Music, Gallery, Clock, Games, etc. whatever we will build those will be
installed on this layer only.
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• The application layer runs within the Android run time using the classes and services made
available from the application framework.
2. Application Framework:
• The Application Framework provides the classes used to create an Android application. It also
provides a generic abstraction for hardware access and manages the user interface and
application resources.
• It basically provides the services through which we can create the particular class and make
that class helpful for the Applications creation.
• The application framework includes services like telephony service, location services,
notification manager, NFC service, view system, etc. which we can use for application
development as per our requirements.
3. Android Runtime:
• Android Runtime environment is an important part of Android rather than an internal part and
it contains a components like core libraries and the Dalvik virtual machine.
• The Android run time is the engine that powers our applications along with the libraries and
it forms the basis for the application framework.
(i) Dalvik Virtual Machine (DVM) is a register-based virtual machine like Java Virtual
Machine (JVM).
It is specially designed and optimized for android to ensure that a device can run multiple
instances efficiently. It relies on the Linux kernel for threading and low-level memory
management.
(ii) The core libraries in android runtime will enable us to implement an android applications
using standard JAVA programming language.
4. Platform Libraries:
• The Platform Libraries includes various C/C++ core libraries and Java based libraries such as
SSL, libc, Graphics, SQLite, Webkit, Media, Surface Manger, OpenGL etc. to provide a
support for android development.
5. Linux Kernel:
• Linux Kernel is a bottom layer and heart of the android architecture. It is heart of Android
architecture that exists at the root of android architecture and contains all the low-level device
drivers for the various hardware components of an Android device.
• Linux Kernel is responsible for device drivers, power management, memory management,
device management and resource access. It manage all the drivers such as display drivers,
camera drivers, Bluetooth drivers, audio drivers, memory drivers, etc. which are mainly
required for the android device during the runtime.
• The Linux Kernel will provide an abstraction layer between the device hardware and the
remainder of the stack. It is responsible for memory management, power management, device
management, resource access, etc.
d) Explain the procedure of Geo-coding and reverse Geo-coding. 4M
Ans Geo-Coding: geocoding 2

• If we know the latitude and longitude of a location, we can find out its address using a process M
known as Geocoding. Google Maps in Android supports this via the Geocoder class.
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• The following code shows how we can find out the address of a location we have just touched and
using the getFromLocation() method: reverse
classMapOverlay extends com.google.android.maps.Overlay geocoding 2
M
{
@Override
publicboolean draw(Canvas canvas, MapViewmapView,
boolean shadow, long when)
{
//...
}
@Override
publicbooleanonTouchEvent(MotionEvent event, MapViewmapView)
{
//---when user lifts his finger---
if (event.getAction() == 1) {
GeoPoint p = mapView.getProjection().fromPixels(
(int) event.getX(),
(int) event.getY());
Geocoder geoCoder = new Geocoder(
getBaseContext(), Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocation(
p.getLatitudeE6() / 1E6,
p.getLongitudeE6() / 1E6, 1);
String add = "";
if (addresses.size() > 0)
{
for (inti=0; i<addresses.get(0).getMaxAddressLineIndex();
i++)
add += addresses.get(0).getAddressLine(i) + "n";
}
Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT).show();
}
catch (IOException e) {
}
return true;
}
else
return false;
}
}
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Reverse-geocoding:
If we know the address of a location but want to know its latitude and longitude, we can do so
via reverse-Geocoding. Again, we can use the Geocoder class for this purpose.
• The following code shows how we can find the exact location of the Empire State Building
by using the getFromLocationName() method:
Geocoder geoCoder = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = geoCoder.getFromLocationName(
"empire state building", 5);
String add = "";
if (addresses.size() > 0) {
p = new GeoPoint(
(int) (addresses.get(0).getLatitude() * 1E6),
(int) (addresses.get(0).getLongitude() * 1E6));
mc.animateTo(p);
mapView.invalidate();
}
} catch (IOException e) {
}
Once. the location is found, the above code navigates the map to the location.
e) Develop an application to send and receive SMS (Write only Java and 4M
permission tag in manifest file).
Ans Permissions and <receiver> tag required in AndroidManifest.xml Manifest
<uses-permission android:name="android.permission.RECEIVE_SMS" /> File:1M
<uses-permission android:name="android.permission.READ_SMS"/> Java Code:
<uses-permission android:name="android.permission.WRITE_SMS"/> 3M
<receiver
<intent-filter>
</intent-filter>
</receiver>
MainActivity.java
(Cosidering appropriate layout file with 2 edit text boxes namely for phone number,
message and a button for sending sms)
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EditText et1,et2;
Button b1;
@Override
protected void onCreate (Bundle savedInstanceState) {
if(ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.SEND_S
MS)!=
{
}
@Override
try {
}
catch(Exception e)
{
}
}
});
}
@Override
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super.onStart();
IntentFilter filter=new IntentFilter("android.provider.Telephony.SMS_RECEIVED");
}
@Override
super.onStop();
}
}
SmsReceiver.java

SmsReceiver(){}
@Override



}
}
}
}
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a) Develop a program to send and receive an Email. 6M
Ans Program to send Email Any correct

activity_main.xml logic
<?xml version="1.0" encoding="utf-8"?> program
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" should be
xmlns:tools="http://schemas.android.com/tools" considered,
android:layout_width="match_parent" 3M for
android:layout_height="match_parent" send logic,
tools:context=".MainActivity"> 3M for
receive
<EditText logic
android:id="@+id/editText1"
android:layout_alignParentRight="true"
android:layout_marginRight="22dp" />
<EditText
android:layout_below="@+id/editText1"
android:layout_alignLeft="@+id/editText1"
<EditText
<TextView
android:layout_alignBaseline="@+id/editText1"
android:layout_alignBottom="@+id/editText1"
android:text="Send To:"
android:textColor="#0F9D58" />
<TextView
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android:text="Email Subject:"
<TextView
android:text="Email Body:"
<Button
android:text="Send email!!" />
</RelativeLayout>
MainActivity.java
// define objects for edit text and button
Button button;
EditText sendto, subject, body;
@Override
// Getting instance of edittext and button

sendto = findViewById(R.id.editText1);
subject = findViewById(R.id.editText2);
body = findViewById(R.id.editText3);
button = findViewById(R.id.button);
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// attach setOnClickListener to button with Intent object define in it
button.setOnClickListener(view -> {
String emailsend = sendto.getText().toString();
String emailsubject = subject.getText().toString();
String emailbody = body.getText().toString();
// define Intent object with action attribute as ACTION_SEND

Intent intent = new Intent(Intent.ACTION_SEND);
// add three fields to intent using putExtra function

intent.putExtra(Intent.EXTRA_EMAIL, new String[]{emailsend});
intent.putExtra(Intent.EXTRA_SUBJECT, emailsubject);
intent.putExtra(Intent.EXTRA_TEXT, emailbody);
// set type of intent

intent.setType("message/rfc822");
// startActivity with intent with chooser as Email client using

createChooser function
startActivity(Intent.createChooser(intent, "Choose an Email client :"));
});
}
}
Program to receive Email

(Note: Receiving email is not the service of Android OS, instead it uses some third party
applicaton like Gmail, so instead of receiving email in android app, a code which broadcasts
message if email comes using broadcast receiver or any relevant logic can be considered.)
MainActivity.java
package com.example.myemailprog;

GmailReceiver gml;
IntentFilter intf;
@Override
gml = new GmailReceiver();
intf = new IntentFilter("android.intent.action.VIEW");
}
@Override
protected void onResume() {
super.onResume();
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registerReceiver(gml, intf);
}
@Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(gml);
}
}
Gmailrerciever..java
package com.example.myemailprog;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.res.Resources;
import android.graphics.BitmapFactory;
public class GmailReceiver extends BroadcastReceiver

{
@Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "Email Received", Toast.LENGTH_LONG).show();
}
}
AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myemailprog">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MyEmailProg">
<activity
android:name=".MainActivity"
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
</activity>
<receiver android:name="GmailReceiver"
android:exported="false">
<intent-filter>
<action android:name="android.intent.action.PROVIDER_CHANGED"
android:priority="-10">
</action>
<action android:name="android.intent.action.VIEW" />
<data android:scheme="content" android:host="gmail-ls"
android:pathPattern="/unread/.*">
</data>
</intent-filter>
</receiver>
</application>
</manifest>
b) Develop a program for providing bluetooth connectivity. 6M
Ans activity_main.xml Layout file

<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android" : 2M
android:layout_width="match_parent" Java File :
android:layout_height="match_parent" 3M
tools:context=".MainActivity" >
Manifest
file : 1M
<TextView android:text=""
android:id="@+id/out"
</TextView>
<Button
android:text="TURN_ON" />
<Button
android:layout_alignLeft="@+id/button1"
android:layout_below="@+id/button1"
android:text="DISCOVERABLE" />
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<Button
android:layout_alignLeft="@+id/button2"
android:layout_below="@+id/button2"
android:text="TURN_OFF" />
</RelativeLayout>
AndroidManifest.xml
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
package="com.example.bluetooth"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<application
android:icon="@drawable/ic_launcher"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.bluetooth.MainActivity"
android:label="@string/app_name" >
<intent-filter>
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
package com.example.bluetooth;
import android.app.Activity;
import android.view.Menu;
import android.bluetooth.BluetoothAdapter;
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import android.util.Log;
public class MainActivity extends Activity {

private static final int REQUEST_ENABLE_BT = 0;
private static final int REQUEST_DISCOVERABLE_BT = 0;
@Override
final TextView out=(TextView)findViewById(R.id.out);
final Button button1 = (Button) findViewById(R.id.button1);
final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter == null) {
out.append("device not supported");
}
if (!mBluetoothAdapter.isEnabled()) {
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
}
}
});
@Override
public void onClick(View arg0) {
if (!mBluetoothAdapter.isDiscovering()) {
//out.append("MAKING YOUR DEVICE DISCOVERABLE");
Toast.makeText(getApplicationContext(), "MAKING YOUR DEVICE DISCOVERA
BLE",
Toast.LENGTH_LONG);
Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVER

ABLE);
startActivityForResult(enableBtIntent, REQUEST_DISCOVERABLE_BT);
}
}
});
@Override
public void onClick(View arg0) {
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mBluetoothAdapter.disable();
//out.append("TURN_OFF BLUETOOTH");
Toast.makeText(getApplicationContext(), "TURNING_OFF BLUETOOTH", Toast.LENGT
H_LONG);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
c) Develop a program to implement 6M
i) List view of 5 items

ii) Grid view of 4 x 4 items
iii) Image view.
Ans <?xml version="1.0" encoding="utf-8"?> Correct

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" Logics for
xmlns:app="http://schemas.android.com/apk/res-auto" ListView :
GridView :
android:orientation="vertical"
2M
ImageView
<ListView : 2M
android:id="@+id/sample_list"
android:layout_height="wrap_content" >
</ListView>
<GridView
android:id="@+id/gridview1"
android:columnWidth="50dp"
android:gravity="center"
android:numColumns="auto_fit"
android:stretchMode="columnWidth" >
</GridView>
<ImageView
android:id="@+id/full_logo"
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app:srcCompat="@drawable/android_logo" />
</LinearLayout>
Placed image that has to be displayed in drawable folder
package in.msbte.controls_exam_ques;
import android.widget.ArrayAdapter;
import android.widget.GridView;
import android.widget.ListView;

String[] sampleArray = {"Item 1","Item 2","Item 3","Item 4", "Item 5"};
GridView gridView;
static final String[] alphabets = new String[]{
"A", "B", "C", "D", "E",
"F", "G", "H", "I", "J",
"K", "L", "M", "N", "O",
"P", "Q", "R", "S", "T",
"U", "V", "W", "X", "Y", "Z"
};
ArrayAdapter adapter, adapter1;
@Override
//List View
adapter = new ArrayAdapter<String>(this, R.layout.simple_item, sampleArray);
ListView listView = (ListView) findViewById(R.id.sample_list);
listView.setAdapter(adapter);
//Grid View
gridView = (GridView) findViewById(R.id.gridview1);
adapter1 = new ArrayAdapter<String>(this, R.layout.simple_item, alphabets);
gridView.setAdapter(adapter1);
}
}
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a) Develop an application to store customer's details like, customer-id, customer-name, 6M
mobile number, address, pin-code and retrieve customer information using customer-id
in SQLite databases.
(Any other relevant logic can be considered)
Ans activity_main.xml Layout File
<?xml version="1.0" encoding="utf-8"?> : 1M
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" Java File :
android:layout_width="match_parent" Correct
android:layout_height="match_parent" Logics for
Create
table : 1M
<TextView Insertion of
android:text="Insert Customer Details" record : 2M
android:layout_width="wrap_content" Retrival of
android:layout_height="wrap_content" data : 2M
android:textColor="#000000"/>
<EditText
android:hint="ID"
android:id="@+id/editid"
android:layout_below="@+id/textView"/>
<EditText
android:hint="Name"
android:id="@+id/editname"
android:layout_below="@+id/editid"/>
<EditText
android:hint="Mobile No."
android:id="@+id/editmobile"
android:layout_below="@+id/editname"/>
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<EditText
android:hint="Address"
android:lines="3"
android:id="@+id/editaddress"
android:layout_below="@+id/editmobile"/>
<EditText
android:hint="Pin Code"
android:id="@+id/editpincode"
android:layout_below="@+id/editaddress"/>
<Button
android:text="Insert Data"
android:layout_below="@+id/editpincode"
<TextView
android:text="Search Customer Details"
android:layout_below="@+id/button"
<EditText
android:hint="Enter ID"
android:id="@+id/editsearchid"
android:layout_below="@+id/textView1"/>
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<Button
android:text="Search Data"
android:layout_below="@+id/editsearchid"
android:id="@+id/button1" />
</RelativeLayout>
MainActivity.java
package in.msbte.database;
import android.database.Cursor;

EditText editTextID, editTextName, editMobileNo, editAddress, editPincode,
editSearchid;
String cid, cname, cmobile, caddress, cpincode, sql_query, sid;
Button EnterData, SearchData;
@Override
EnterData = (Button)findViewById(R.id.button);
SearchData = (Button)findViewById(R.id.button1);
editTextID = (EditText)findViewById(R.id.editid);
editTextName = (EditText)findViewById(R.id.editname);
editMobileNo = (EditText)findViewById(R.id.editmobile);
editAddress = (EditText)findViewById(R.id.editaddress);
editPincode = (EditText)findViewById(R.id.editpincode);
editSearchid = (EditText)findViewById(R.id.editsearchid);
EnterData.setOnClickListener(new View.OnClickListener() {
@Override
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sqLiteDatabaseObj = openOrCreateDatabase("AndroidJSonDataBase",
sqLiteDatabaseObj.execSQL("CREATE TABLE IF NOT EXISTS
AndroidJSonTable(id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, cid
VARCHAR, name VARCHAR, mobile VARCHAR, address VARCHAR, pincode
VARCHAR);");
cid = editTextID.getText().toString();
cname = editTextName.getText().toString() ;
cmobile = editMobileNo.getText().toString();
caddress = editAddress.getText().toString();
cpincode = editPincode.getText().toString();
sql_query = "INSERT INTO AndroidJSonTable (cid, name, mobile, address,
pincode) VALUES('"+cid+"', '"+cname+"', '"+cmobile+"', '"+caddress+"', '"+cpincode+"');";
sqLiteDatabaseObj.execSQL(sql_query);
Toast.makeText(getApplicationContext(), "Data Inserted Successfully",
}
});
SearchData.setOnClickListener(new View.OnClickListener() {
@Override
sid = editSearchid.getText().toString();
Cursor cursor = sqLiteDatabaseObj.rawQuery( "select * from AndroidJSonTable
where cid="+sid+"", null );
StringBuffer buffer= new StringBuffer();
while (cursor.moveToNext())
{
String cid =cursor.getString(1);
String name =cursor.getString(2);
String mob =cursor.getString(3);
String addr =cursor.getString(4);
String pcode =cursor.getString(5);
buffer.append(cid+ " " + name + " " + mob +" " + addr +" " + pcode +"
\n");
Toast.makeText(getApplicationContext(), buffer,
} }); } }
b) Write a program to find the direction from user's current location to MSBTE, 6M
Bandra. (Write only Java and manitest file).
(Note : Any other relevant logic to get the required output can also be considered.)
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Ans AndroidManifest.xml Manifest
file :2M
<manifest xmlns:android="http://schemas.android.com/apk/res/android" Java File :
package="com.example.msbte.google_map_currentlocationroute"> 4M
<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"
/>
<application
android:theme="@style/AppTheme">
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity android:name=".MainActivity">
<intent-filter>

</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
import android.content.DialogInterface;
import android.net.Uri;
import android.provider.Settings;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AlertDialog;
import android.util.Log;
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import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.Polyline;
import com.google.android.gms.maps.model.PolylineOptions;
import com.karumi.dexter.Dexter;
import com.karumi.dexter.MultiplePermissionsReport;
import com.karumi.dexter.PermissionToken;
import com.karumi.dexter.listener.DexterError;
import com.karumi.dexter.listener.PermissionRequest;
import com.karumi.dexter.listener.PermissionRequestErrorListener;
import com.karumi.dexter.listener.multi.MultiplePermissionsListener;
import java.util.List;
public class MainActivity extends AppCompatActivity implements

GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener,
com.google.android.gms.location.LocationListener , OnMapReadyCallback,
TaskLoadedCallback{
//variables for map and route
private GoogleMap mMap;

private MarkerOptions place1, place2;
Button getDirection;
private Polyline currentPolyline;
private MapFragment mapFragment;
private boolean isFirstTime = true;
//variables for current location

private static final String TAG = "MainActivity";
private TextView tvLocation;

private GoogleApiClient mGoogleApiClient;
private Location mLocation;
private LocationRequest mLocationRequest;
private com.google.android.gms.location.LocationListener listener;
private long UPDATE_INTERVAL = 2 * 1000; /* 10 secs */
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private long FASTEST_INTERVAL = 2000; /* 2 sec */
@Override
//code for getting current location

requestMultiplePermissions();
tvLocation = (TextView) findViewById((R.id.tv));
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
//code for drawing route
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.clear();
Log.d("mylog", "Added Markers");
mMap.addMarker(place1);
mMap.addMarker(place2);
CameraPosition googlePlex = CameraPosition.builder()

.target(new LatLng(22.7739,71.6673))
.zoom(7)
.bearing(0)
.tilt(45)
.build();
mMap.animateCamera(CameraUpdateFactory.newCameraPosition(googlePlex), 5000,
null);
}
private String getUrl(LatLng origin, LatLng dest, String directionMode) {

// Origin of route
String str_origin = "origin=" + origin.latitude + "," + origin.longitude;
// Destination of route
String str_dest = "destination=" + dest.latitude + "," + dest.longitude;
// Mode
String mode = "mode=" + directionMode;
// Building the parameters to the web service
String parameters = str_origin + "&" + str_dest + "&" + mode;
// Output format
String output = "json";
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// Building the url to the web service
String url = "https://maps.googleapis.com/maps/api/directions/" + output + "?" +
parameters + "&key=" + getString(R.string.google_maps_key);
return url;
}
@Override
public void onTaskDone(Object... values) {
if (currentPolyline != null)
currentPolyline.remove();
currentPolyline = mMap.addPolyline((PolylineOptions) values[0]);
}
//runtime permission method
private void requestMultiplePermissions(){

Dexter.withActivity(this)
.withPermissions(
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION )
.withListener(new MultiplePermissionsListener() {
@Override
public void onPermissionsChecked(MultiplePermissionsReport report) {
// check if all permissions are granted
if (report.areAllPermissionsGranted()) {
Toast.makeText(getApplicationContext(), "All permissions are granted by
user!", Toast.LENGTH_SHORT).show();
}
// check for permanent denial of any permission

if (report.isAnyPermissionPermanentlyDenied()) {
// show alert dialog navigating to Settings
openSettingsDialog();
}
}
@Override
public void onPermissionRationaleShouldBeShown(List<PermissionRequest>
permissions, PermissionToken token) {
token.continuePermissionRequest();
}
}).
withErrorListener(new PermissionRequestErrorListener() {
@Override
public void onError(DexterError error) {
Toast.makeText(getApplicationContext(), "Some Error! ",
}
})
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.onSameThread()
.check();
}
private void openSettingsDialog() {

AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Required Permissions");
builder.setMessage("This app require permission to use awesome feature. Grant them in
app settings.");
builder.setPositiveButton("Take Me To SETTINGS", new
DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
Intent intent = new
Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", getPackageName(), null);
intent.setData(uri);
startActivityForResult(intent, 101);
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
builder.show();
}
//methods for getting current location

@Override
public void onConnected(Bundle bundle) {
PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,
return;
}
startLocationUpdates();
mLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLocation == null){
startLocationUpdates();
}
if (mLocation != null) {
// mLatitudeTextView.setText(String.valueOf(mLocation.getLatitude()));
//mLongitudeTextView.setText(String.valueOf(mLocation.getLongitude()));
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} else {
Toast.makeText(this, "Location not Detected", Toast.LENGTH_SHORT).show();
} }
@Override
public void onConnectionSuspended(int i) {
Log.i(TAG, "Connection Suspended");
mGoogleApiClient.connect();
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode());
}
@Override
super.onStart();
if (mGoogleApiClient != null) {
} }
@Override
super.onStop();
if (mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
} }
protected void startLocationUpdates() {

// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this,
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
mLocationRequest, this);
}
@Override
public void onLocationChanged(Location location) {
String msg = "Updated Location: " +

Double.toString(location.getLatitude()) + "," +
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Double.toString(location.getLongitude());
tvLocation.setText(String.valueOf(location.getLatitude() +"
"+String.valueOf(location.getLongitude())));
Toast.makeText(this, msg, Toast.LENGTH_SHORT).show();
if(isFirstTime){
//code to draw path on map
getDirection = findViewById(R.id.btnGetDirection);
getDirection.setOnClickListener(new View.OnClickListener() {
@Override
new FetchURL(MainActivity.this).execute(getUrl(place1.getPosition(),
place2.getPosition(), "driving"), "driving");
}
});
place1 = new MarkerOptions().position(new LatLng(location.getLatitude(),

location.getLongitude())).title("Location 1");
place2 = new MarkerOptions().position(new
LatLng(19.021824,72.8662016)).title("MSBTE");
mapFragment = (MapFragment)
getFragmentManager().findFragmentById(R.id.mapNearBy);
mapFragment.getMapAsync(this);
isFirstTime = false;
} }}
c) Develop a simple calculator using relative layout. 6M
Ans activity_main.xml Use of

<?xml version="1.0" encoding="utf-8"?> Relative
<RelativeLayout Layout
xmlns:android="http://schemas.android.com/apk/res/android" with
appropriate
xmlns:app="http://schemas.android.com/apk/res-auto" attributes :
xmlns:tools="http://schemas.android.com/tools" 3M
android:layout_height="match_parent" Logic for
simple
calculator
with basic
<TextView arithmetic
android:id="@+id/heading" operations :
android:layout_width="wrap_content" 3M
android:text=" Calculator"
android:textSize="30dp" />
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<EditText
android:id="@+id/num1"
android:layout_below="@+id/heading"
android:hint="Enter Number 1"
android:inputType="number" />
<EditText
android:id="@+id/num2"
android:layout_below="@+id/num1"
android:hint="Enter Number 2"
android:inputType="number" />
<TextView
android:id="@+id/result"
android:layout_below="@+id/num2"
android:text="Result" />
<Button
android:id="@+id/sum"
android:layout_below="@id/result"
android:text="+" />
<Button
android:id="@+id/sub"
android:layout_toRightOf="@id/sum"
android:text="-" />
<Button
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android:id="@+id/div"
android:layout_toRightOf="@id/sub"
android:text="/" />
<Button
android:id="@+id/mul"
android:layout_toRightOf="@id/div"
android:text="x"/>
</RelativeLayout>
MainActivity.java
package in.msbte.calculator;
public EditText e1, e2;
Button add, sub , mul, div;
TextView t1;
int num1, num2;
@Override
e1 = (EditText) findViewById(R.id.num1);
e2 = (EditText) findViewById(R.id.num2);
t1 = (TextView) findViewById(R.id.result);
add = (Button) findViewById(R.id.sum);
mul = (Button) findViewById(R.id.mul);
div = (Button) findViewById(R.id.div);
sub = (Button) findViewById(R.id.sub);
add.setOnClickListener(new View.OnClickListener() {
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@Override
num1 = Integer.parseInt(e1.getText().toString());
int sum = num1 + num2;
t1.setText(Integer.toString(sum));
}
});
sub.setOnClickListener(new View.OnClickListener() {
@Override
int sum = num1 - num2;
}
});
mul.setOnClickListener(new View.OnClickListener() {
@Override
int sum = num1 * num2;
}
});
div.setOnClickListener(new View.OnClickListener() {
@Override
int sum = num1 / num2;
}
});
}
}
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__________________________________________________________________________________________________
SUMMER – 2023 EXAMINATION
Model Answer – Only for the Use of RAC Assessors
Subject Name: Mobile Application Development Subject Code: 22617

+Marathi), the Examiner shall consider the same and assess the answer based on matching of concepts with model
answer.
Q. Sub Answer Marking

No. Q. Scheme
N.
a) State Android ECO System. 2M
Ans Android Ecosystem Any 4

points
2M
• Ecosystem in Market terminology refers to the inter-dependence between demand

and supply.
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• In the Android ecosystem this translates to inter-dependence between users,
developers, and equipment makers. One cannot exist without the other:
▪ Google develops android
▪ Users buy devices and applications
▪ Original Equipment makers sell devices, sometimes bundled with applications
▪ Developers buy devices, then make and sell applications
▪ Freelance Android Developer developers have the skills to contribute to the
ecosystem for android development , they are who creates their own applications and
published them on googles play store.
b) List various tools for android application development 2M
Ans • Android Studio Any

• ADB (Android Debug Bridge)
4 tools
• AVD Manager
• Eclipse 2M
• Fabric
• FlowUp
• GameMaker: Studio
• Genymotion
• Gradle IntelliJ IDEA
c) List various layouts used in android UI design. 2M
Ans • Linear Layout Any

• Absolute Layout
4 layouts
• Frame Layout
• Table Layout 2M
• Relative Layout
d) Name any four attributes of Edit Text control. 2M
Ans android:id Any

android: gravity
android: text 4 attributes
android: hint
2M
android: textColor
android: textSize
android: textStyle
android: background
e) State the use of fragments in android App development. 2M
Ans Android Fragment is the part of activity, it is also known as sub-activity. There can be more Explanation
2M
than one fragment in an activity.
Fragments represent multiple screen inside one activity.
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We can create Fragments by extending Fragment class or by inserting a Fragment into our
Activity layout by declaring the Fragment in the activity’s layout file, as
a <fragment> element.
Fragments were added in Honeycomb version of Android i.e API version 11. We can add,
replace or remove Fragment’s in an Activity while the activity is running.
Fragment can be used in multiple activities.
We can also combine multiple Fragments in a single activity to build a multi-plane UI.
We can only show a single Activity on the screen at one given point of time so we were not
able to divide the screen and control different parts separately. With the help of Fragment’s
we can divide the screens in different parts and controls different parts separately
f) Define SMS service in android application development. 2M
Ans SMS Any
• In Android, you can use SmsManager API or devices Built-in SMS application to 4 points
send SMS's
2M
• Android SMS is stored in PDU (protocol description unit) format
• SmsManager class takes care of sending the SMS message.
• We just need to get an instance of it and send the SMS message.
• We need to add permission to SEND_SMS in the Android manifest file.
SmsManager smsManager = SmsManager.getDefault();

smsManager.sendTextMessage("phoneNo", null, "sms message", null, null);
g) List different types of sensors used in android. 2M
Ans The android platform supports three broad categories of sensors. 2 M for List
• Motion Sensors
These are used to measure acceleration forces and rotational forces along with three
axes.
• Environmental sensors
These are used to measure the environmental changes such as temperature, humidity etc.
• Position sensors
These are used to measure the physical position of device.
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a) Describe android and importance of OHA. 4M
Ans Android Explain

android 2 M
Android is an open source and Linux-based Operating System .It is designed primarily for
touch screens mobile devices such as smartphones and tablet computers. Android offers a Importance
unified approach to application development for mobile devices which means developers 2M
need only develop for Android, and their applications should be able to run on different
devices powered by Android.
Android was developed by the Open Handset Alliance, led by Google, and other companies.
OHA
• The Open Handset Alliance (OHA) is a business alliance that was created for the
purpose of developing open mobile device standards.
• The OHA has approximately 80 member companies, including HTC, Dell, Intel,
Motorola, Qualcomm and Google.
Importance of OHA
• Lower overall handset costs: Opens up resources, which facilitates the focus on
creating innovative applications, solutions and services.
• Developer-friendly environment: In the open-source community, developers share
notes to expedite application development.
• Post-development: Provides an ideal channel for application marketing and
distribution.
b) Explain Dalvik Virtual Machine and state its importance. 4M
Ans The Dalvik Virtual Machine (DVM) is an android virtual machine optimized for mobile Explain 2
devices. M
Dalvik VM is also a virtual machine that is highly optimized for mobile devices. Importance
2M
Thus, it provides all the three things, that are memory management, high performance as
well as battery life.
It is strictly developed for Android mobile phones.
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The Dex compiler converts the class files into the .dex file that run on the Dalvik VM.
Multiple class files are converted into one dex file.
The javac tool compiles the java source file into the class file.
The dx tool takes all the class files of your application and generates a single .dex file. It is a
platform-specific tool.
The Android Assets Packaging Tool (aapt) handles the packaging process.
c) Describe the process of getting the map API key. 4M
Ans Creating API keys Correct

Steps 4
The API key is a unique identifier that authenticates requests associated with your project marks
for usage and billing purposes. You must have at least one API key associated with your
project.
1. Browse the site on your browser. https://console. developers. google.com/project

2. Login with your google account.
3. Create a new project by clicking on Create Project option.
4. Add your project name and organization name in the fields present on the screen.
5. Now click on APIs and Services.
6. Enable APIs and services.
7. Select Google maps Android API
8. To create an API key for Maps click on Create credentials option and then select
the API key option
Click on the API key option to generate your API key. After clicking on this option your
API key will be generated
d) Explain multimedia framework in android. 4M
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Ans Multimedia Framework Proper
Explanation
4 marks
• The android multimedia system includes multimedia applications, multimedia

framework, OpenCore engine and hardware abstract for audio/video input/output
devices.
• The goal of the android multimedia framework is to provide a consistent interface
for Java services.
• The multimedia framework consists of several core dynamic libraries such as
libmediajni, libmedia, libmediaplayservice and so on
• Java classes call the Native C library Libmedia through Java JNI (Java Native
Interface).
• Libmedia library communicates with Media Server guard process through Android’s
Binder IPC (inter process communication) mechanism.
• Media Server process creates the corresponding multimedia service according to the
Java multimedia applications. The whole communication between Libmedia and
Media Server forms a Client/Server model.
• In Media Server guard process, it calls OpenCore multimedia engine to realize the
specific multimedia processing functions. And the OpenCore engine refers to the
PVPlayer and PVAuthor.
a) Describe various installation steps of android studio and its environment. 4M
Ans Step 1: Correct
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Go to Android https://developer.android.com/studio to get the Android Studio executable or steps 4
zip file. marks
Step 2:
● Click on the Download Android Studio Button.
● Click on the “I have read and agree with the above terms and conditions” checkbox
followed by the download button
● Click on the Save file button in the appeared prompt box and the file will start
downloading.
Step 3:
After the downloading has finished, open the file from downloads and will prompt the
following dialog box. Click on next. In the next prompt, it’ll ask for a path for installation.
Choose a path and hit next.
Step 4:
It will start the installation, and once it is completed, it will be like the image shown below.
Step 5:
Once “Finish” is clicked, it will ask whether the previous settings need to be imported [if the
android studio had been installed earlier], or not. It is better to choose the ‘Don’t import
Settings option’. Click the OK button.
Step 6:
This will start the Android Studio. Meanwhile, it will be finding the available SDK
components.
Step 7:
After it has found the SDK components, it will redirect to the Welcome dialog box. Choose
Standard and click on Next. Now choose the theme, whether the Light theme or the Dark
one. The light one is called the IntelliJ theme whereas the dark theme is called Dracula.
Choose as required. Click on the Next button.
Step 8:
Now it is time to download the SDK components. Click on Finish. Components begin to
download let it complete. The Android Studio has been successfully configured. Now it’s
time to launch and build apps. Click on the Finish button to launch it.
Step 9:
Click on Start a new Android Studio project to build a new app.
b) Explain Gridview with its attributes with suitable example. 4M
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Ans GridView : (1 M for
explanation
Android GridView shows items in two-dimensional scrolling grid (rows & columns) and the of
grid items are not necessarily predetermined but they automatically inserted to the layout GridView,1
using a ListAdapter. M for
explaining
GridView Attributes
attributes, 2
Following are the important attributes specific to GridView – M example)
[any two
attributes
Sr.No Attribute & Description should be
considered
1 android:id
for 1 M,
This is the ID which uniquely identifies the layout. any valid
example of
2 android:columnWidth GridView
for 2 M]
This specifies the fixed width for each column. This could be in px, dp,
sp, in, or mm.
3 android:gravity
Specifies the gravity within each cell. Possible values are top, bottom,
left, right, center, center_vertical, center_horizontal etc.
4 android:horizontalSpacing
Defines the default horizontal spacing between columns. This could be
in px, dp, sp, in, or mm.
5 android:numColumns
Defines how many columns to show. May be an integer value, such as
"100" or auto_fit which means display as many columns as possible to
fill the available space.
6 android:stretchMode
Defines how columns should stretch to fill the available empty space, if
any. This must be either of the values −
• none − Stretching is disabled.
• spacingWidth − The spacing between each column is stretched.
• columnWidth − Each column is stretched equally.
• spacingWidthUniform − The spacing between each column is
uniformly stretched..
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7 android:verticalSpacing
Defines the default vertical spacing between rows. This could be in px,
dp, sp, in, or mm.
activity_main.xml Code :
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_height="fill_parent"
android:columnWidth="90dp"
android:horizontalSpacing="10dp"
android:numColumns="auto_fit"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp"
</GridView>
activity_listview.xml code :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical">
<Button
android:id="@+id/btn"
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android:layout_gravity="center" />
</LinearLayout>
MainActivity.java
package com.example.myapplication.gridviewbuttons;
import android.widget.GridView;
GridView gridview;
String arr[] = new String[15];
@Override
gridview = findViewById(R.id.gridview);
for (int i = 0; i < 15; i++) {
arr[i] = Integer.toString(i + 1);
}
ArrayAdapter<String> ad = new ArrayAdapter<String>(this, R.layout.activity_listview,
R.id.btn, arr);
gridview.setAdapter(ad);
}
}
c) Explain text to speech conversion technique in android 4M
Ans Text to Speech converts the text written on the screen to speech like you have written “Hello Proper
World” on the screen and when you press the button it will speak “Hello World”. Text-to- explanation
speech is commonly used as an accessibility feature to help people who have trouble reading
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on-screen text, but it’s also convenient for those who want to be read too. This feature has 4 marks
come out to be a very common and useful feature for the users.
In android, by using TextToSpeech class we can easily convert our text into voice and it
supports different types of speaking languages. We can choose the speaking language based
on our requirements in the android application.
The android TextToSpeech instance can only be used to synthesize text once it has
completed its initialization so implement TextToSpeech.
OnInitListener to notify the completion of initialization. During the initialization, we can set
the audio pitch rate, audio speed, type of language to speak, etc. based on our requirements.
activity_main.xml
<LinearLayout
android:layout_margin="30dp"
<EditText
android:id="@+id/Text"
android:hint="Enter your text"
android:textSize="16dp"/>
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<Button
android:id="@+id/btnText"
android:text="Click"
android:layout_gravity="center"/>
<TextView
android:gravity="center_horizontal"
android:text="MobileApplicationDevelopment"
android:textSize="36sp" />
</LinearLayout>
MainActivity.java
import android.speech.tts.TextToSpeech;
import java.util.Locale;
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EditText Text;
Button btnText;
TextToSpeech textToSpeech;
@Override
Text = findViewById(R.id.Text);
btnText = findViewById(R.id.btnText);
textToSpeech = new TextToSpeech(getApplicationContext(), new

TextToSpeech.OnInitListener() {
@Override
public void onInit(int i) {
if(i!=TextToSpeech.ERROR){
// To Choose language of speech
textToSpeech.setLanguage(Locale.UK);
}
}
});
btnText.setOnClickListener(new View.OnClickListener() {
@Override
textToSpeech.speak(Text.getText().toString(),TextToSpeech.QUEUE_FLUSH,null);
}
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});
}
}
d) Describe steps for deploying android application on Google Play Store. 4M
Ans Step 1: Create a Developer Account Correct

Before you can publish any app on Google Play, you need to create a Developer Account. steps 4
You can easily sign up for one using your existing Google Account. You’ll need to pay a marks
one-time registration fee of $25 using your international credit or debit card. It can take
up to 48 hours for your registration to be fully processed.

If you want to publish a paid app or plan to sell in-app purchases, you need to create a
payments center profile, i.e. a merchant account. A merchant account will let you manage
your app sales and monthly payouts, as well as analyze your sales reports right in your
Play Console.

Now you have create an application by clicking on 'Create Application'. Here you have
to select your app’s default language from the drop-down menu and then type in a title
for your app. The title of your app will show on Google Play after you’ve published.

Before you can publish your app, you need to prepare its store listing. These are all the
details that will show up to customers on your app’s listing on Google Play. You not
necessarily complete it at once , you can always save a draft and revisit it later when
you’re ready to publish.
Product Details containing title, short and full description of the app, Your app’s title and
description should be written with a great user experience in mind. Use the right keywords,
but don’t overdo it. Make sure your app doesn’t come across as spam-y or promotional, or it
will risk getting suspended on the Play Store.
Graphic Assets where you can add screenshots, images, videos, promotional graphics,
and icons that showcase your app’s features and functionality.
Languages & Translations, Categorization where in category can be selected to which
your app belong to. Contact Details , Privacy Policy for apps that request access to sensitive
user data or permissions, you need to enter a comprehensive privacy policy that effectively
discloses how your app collects, uses, and shares that data.

Finally upload your app, by uploading APK file. Before you upload APK, you need to
create an app release. You need to select the type of release you want to upload your first
app version to. You can choose between an internal test, a closed test, an open test, and a
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production release. The first three releases allow you to test out your app among a select
group of users before you make it go live for everyone to access.
This is a safer option because you can analyze the test results and optimize or fix your
app accordingly if you need to before rolling it out to all users.
Once you create a production release, your uploaded app version will become accessible
to everyone in the countries you choose to distribute it in and click on ‘Create release.’

If you don’t assign a rating to your app, it will be listed as ‘Unrated’. Apps that are
‘Unrated’ may get removed from Google Play.
To rate your app, you need to fill out a content rating questionnaire An appropriate
content rating will also help you get to the right audience, which will eventually improve
your engagement rates.

monetization strategy. Once you know how your app is going to make money, you can go
ahead and set up your app as free or paid.
You can always change your app from paid to free later, but you cannot change a free app
to paid. For that, you’ll need to create a new app and set its price.

The final step involves reviewing and rolling out your release after making sure you’ve
taken care of everything else.
Before you review and rollout your release, make sure the store listing, content rating,
and pricing and distribution sections of your app each have a green check mark next to
them.
Once you’re sure about the correctness of the details, select your app and navigate to
‘Release management’ – ‘App releases.’ You can always opt for reviews by clicking on
‘Review’ to be taken to the ‘Review and rollout release’ screen. Here, you can see if there
are any issues or warnings you might have missed out on.
a) Describe directory structure and its components. 4M
Ans The android project contains different types of app modules, source code files, and resource 1 M for
files. listing of
directory
1. Manifests Folder structure , 3
2. Java Folder M for
explanation
3. res (Resources) Folder )
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• Drawable Folder
• Layout Folder
• Mipmap Folder
• Values Folder
4. Gradle Scripts
Manifests Folder
Manifests folder contains AndroidManifest.xml for creating our android application. This
file contains information about our application such as the Android version, metadata, states
package for Kotlin file, and other application components. It acts as an intermediator
between android OS and our application.
Java folder
The Java folder contains all the java source code (.java) files that we create during the app
development, including other Test files. If we create any new project using Java, by default
the class file MainActivity.java will be created.
Resource (res) folder
The resource folder is the most important folder because it contains all the non-code sources
like images, XML layouts, and UI strings for our android application.
res/drawable folder
It contains the different types of images used for the development of the application. We
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need to add all the images in a drawable folder for the application development.
res/layout folder
The layout folder contains all XML layout files which we used to define the user interface of
our application. It contains the activity_main.xml file
res/mipmap folder
This folder contains launcher.xml files to define icons that are used to show on the home
screen. It contains different density types of icons depending upon the size of the device
such as hdpi, mdpi, xhdpi.
res/values folder
Values folder contains a number of XML files like strings, dimensions, colors, and style
definitions. One of the most important files is the strings.xml file which contains the
resources.
Gradle Scripts folder
Gradle means automated build system and it contains a number of files that are used to
define a build configuration that can be applied to all modules in our application. In
build.gradle (Project) there are buildscripts and in build.gradle (Module) plugins and
implementations are used to build configurations that can be applied to all our application
modules.
b) Develop an android application for Date and Time Picker. 4M
Ans activity_main.xml (2M for

Date Picker
<?xml version="1.0" encoding="utf-8"?> and 2M for
<RelativeLayout Time
Picker)
<EditText
android:id="@+id/in_time"
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android:layout_alignParentStart="true" />
<Button
android:text="SELECT TIME"
android:id="@+id/btn_time"
android:layout_below="@+id/in_time"/>
</RelativeLayout>
MainActivity.java
package com.example.myapplication.timepickerwithspinnermode;
import android.app.TimePickerDialog;
import java.util.Calendar;
public class MainActivity extends AppCompatActivity implements
View.OnClickListener {
Button btnTimePicker;
EditText txtTime;
private int mHour, mMinute;
@Override
btnTimePicker=(Button)findViewById(R.id.btn_time);
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txtTime=(EditText)findViewById(R.id.in_time);
btnTimePicker.setOnClickListener(this);
}
@Override
if (v == btnTimePicker) {
// Get Current Time
final Calendar c = Calendar.getInstance();
mHour = c.get(Calendar.HOUR_OF_DAY);
mMinute = c.get(Calendar.MINUTE);
// Launch Time Picker Dialog
TimePickerDialog timePickerDialog = new TimePickerDialog(this,
new TimePickerDialog.OnTimeSetListener() {
@Override
public void onTimeSet(TimePicker view, int hourOfDay,
int minute) {
txtTime.setText(hourOfDay + ":" + minute);
}
}, mHour, mMinute, false);
timePickerDialog.show();
}
}
}
c) Explain property animation method to animate the properties of view object with example. 4M
Ans A property animation changes a property's (a field in an object) value over a specified length (2 M for
of time. To animate something, you specify the object property that you want to animate, explaining
such as an object's position on the screen, how long you want to animate it for, and what property
values you want to animate between. animation
method, 2
The property animation system lets you define the following characteristics of an animation: M for
example )
Duration: You can specify the duration of an animation. The default length is 300 ms.
Time interpolation: You can specify how the values for the property are calculated as a
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function of the animation's current elapsed time.
Repeat count and behavior: You can specify whether or not to have an animation repeat
when it reaches the end of a duration and how many times to repeat the animation. You can
also specify whether you want the animation to play back in reverse. Setting it to reverse
plays the animation forwards then backwards repeatedly, until the number of repeats is
reached.
Animator sets: You can group animations into logical sets that play together or sequentially
or after specified delays.
Frame refresh delay: You can specify how often to refresh frames of your animation. The
default is set to refresh every 10 ms, but the speed in which your application can refresh
frames is ultimately dependent on how busy the system is overall and how fast the system
can service the underlying timer.
Strings.xml
<resources>
<string name="app_name">Animation</string>
<string name="blink">BLINK</string>
<string name="fade">FADE</string>
<string name="move">MOVE</string>
</resources>
activity_main.xml
<RelativeLayout
<ImageView
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android:id="@+id/imageview"
android:contentDescription="@string/app_name"
android:src="@drawable/image" />
<LinearLayout
android:id="@+id/linear1"
android:layout_below="@id/imageview"
android:orientation="horizontal"
android:weightSum="3">
<Button
android:id="@+id/BTNblink"
style="@style/TextAppearance.AppCompat.Widget.Button"
android:layout_weight="1"
android:text="@string/blink"
android:textColor="@color/white" />
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<Button
android:id="@+id/BTNfade"
android:text="@string/fade"
<Button
android:id="@+id/BTNmove"
android:text="@string/move"
</LinearLayout>
</RelativeLayout>
1) Blink Animation
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<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha android:fromAlpha="0.0"
android:toAlpha="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:duration="500"
android:repeatMode="reverse"
android:repeatCount="infinite"/>
</set>
2) Fade Animation
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:anim/accelerate_interpolator">
<alpha
android:fromAlpha="0"
android:toAlpha="1" />
<alpha
android:fromAlpha="1"
android:startOffset="2000"
android:toAlpha="0" />
</set>
3) Move Animation
<set
android:interpolator="@android:anim/linear_interpolator"
android:fillAfter="true">
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<translate
android:fromXDelta="0%p"
android:toXDelta="75%p"
android:duration="700" />
</set>
MainActivity.java
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
ImageView imageView;
Button blinkBTN, fadeBTN, moveBTN;
@Override
imageView = findViewById(R.id.imageview);
blinkBTN = findViewById(R.id.BTNblink);
fadeBTN = findViewById(R.id.BTNfade);
moveBTN = findViewById(R.id.BTNmove);
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blinkBTN.setOnClickListener(new View.OnClickListener() {
@Override
// To add blink animation
Animation animation =
AnimationUtils.loadAnimation(getApplicationContext(), R.anim.blink_animation);
imageView.startAnimation(animation);
}
});
fadeBTN.setOnClickListener(new View.OnClickListener() {
@Override
// To add fade animation
AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fade_animation);
}
});
moveBTN.setOnClickListener(new View.OnClickListener() {
@Override
// To add move animation
AnimationUtils.loadAnimation(getApplicationContext(), R.anim.move_animation);
}
});
}
}
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d) Describe permissions required for android application development. 4M
Ans The Android security model is primarily based on a sandbox and permission mechanism. (2 Marks
Each application is running in a specific Dalvik virtual machine with a unique user ID for two
assigned to it, which means the application code runs in isolation from the code of all other permission
applications. Therefore, one application has not granted access to other applications’ files. explanation
)
Android application has been signed with a certificate with a private key Know the owner of
the application is unique. This allows the author of the application will be identified if
needed. When an application is installed in the phone is assigned a user ID, thus avoiding it
from affecting it other applications by creating a sandbox for it. This user ID is permanent
on which devices and applications with the same user ID are allowed to run in a single
process. This is a way to ensure that a malicious application has Cannot access /
compromise the data of the genuine application. It is mandatory for an application to list all
the resources it will Access during installation. Terms are required of an application, in the
installation process should be user-based or interactive Check with the signature of the
application.
The purpose of a permission is to protect the privacy of an Android user. Android apps must
request permission to access sensitive user data (such as contacts and SMS), as well as
certain system features (such as camera and internet). Depending on the feature, the system
might grant the permission automatically or might prompt the user to approve the request.
Permissions are divided into several protection levels. The protection level affects whether
runtime permission requests are required. There are three protection levels that affect third-
party apps: normal, signature, and dangerous permissions.
Normal permissions cover areas where your app needs to access data or resources outside
the app’s sandbox, but where there’s very little risk to the user’s privacy or the operation of
other apps. For example, permission to set the time zone is a normal permission. If an app
declares in its manifest that it needs a normal permission, the system automatically grants
the app that permission at install time. The system doesn’t prompt the user to grant normal
permissions, and users cannot revoke these permissions.
Signature permissions: The system grants these app permissions at install time, but only
when the app that attempts to use permission is signed by the same certificate as the app that
defines the permission.
Dangerous permissions: Dangerous permissions cover areas where the app wants data or
resources that involve the user’s private information, or could potentially affect the user’s
stored data or the operation of other apps. For example, the ability to read the user’s contacts
is a dangerous permission. If an app declares that it needs a dangerous permission, the user
must explicitly grant the permission to the app. Until the user approves the permission, your
app cannot provide functionality that depends on that permission. To use a dangerous
permission, your app must prompt the user to grant permission at runtime. For more details
about how the user is prompted, see Request prompt for dangerous permission.
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e) Develop an android application to show current location of an user's car 4M
Ans activity_maps.xml (2 M for

xml code, 1
<fragment xmlns:android="http://schemas.android.com/apk/res/android" M java
xmlns:map="http://schemas.android.com/apk/res-auto" code,
1 M for
xmlns:tools="http://schemas.android.com/tools" permissions
)
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
tools:context="example.com.mapexample.MapsActivity" />
MapsActivity.java
import android.os.Build;
import android.support.v4.app.FragmentActivity;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.Marker;
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import android.support.v4.content.ContextCompat;
import com.google.android.gms.location.LocationListener;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,

LocationListener,GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener{

Location mLastLocation;
Marker mCurrLocationMarker;
GoogleApiClient mGoogleApiClient;
LocationRequest mLocationRequest;
@Override
setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment)
getSupportFragmentManager()
.findFragmentById(R.id.map);
@Override
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mMap = googleMap;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
else {
}
}
protected synchronized void buildGoogleApiClient() {
.addApi(LocationServices.API).build();
}
@Override
mLocationRequest = new LocationRequest();
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mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
;
}
@Override
@Override
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
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mCurrLocationMarker = mMap.addMarker(markerOptions);
//move map camera

mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
//stop location updates

LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient,
this);
}
}
@Override
}
}
Add the following user-permission in AndroidManifest.xml file.
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
Note: only the permission line can be written , no entire code is required for manifest file.
a) Design a employee registration form using UI component. 6M
Ans activity_main.xml (Any

<?xml version="1.0" encoding="utf-8"?> Correct
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" Design -
XML file:
6M)
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<TextView
android:text="Employee Registration Form"
<EditText
android:hint="ID"
android:id="@+id/editid"
android:layout_below="@+id/textView"/>
<EditText
android:hint="Name"
android:id="@+id/editname"
android:layout_below="@+id/editid"/>
<EditText
android:hint="Mobile No."
android:id="@+id/editmobile"
android:layout_below="@+id/editname"/>
<EditText
android:hint="Address"
android:lines="3"
android:id="@+id/editaddress"
android:layout_below="@+id/editmobile"/>
<EditText
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android:hint="Pin Code"
android:id="@+id/editpincode"
android:layout_below="@+id/editaddress"/>
<Button
android:text="Submit Details"
android:layout_below="@+id/editpincode"
</RelativeLayout>
b) Develop an android application for taking student feedback with database 6M

connectivity.
Ans activity_main.xml (Any
correct code
<?xml version="1.0" encoding="utf-8"?> can be
consider
xmlns:app="http://schemas.android.com/apk/res-auto" 3 Marks for
xmlns:tools="http://schemas.android.com/tools" XML file
android:layout_width="match_parent" and 3 marks
android:layout_height="match_parent" for Java
file)
<TextView
android:text="Student Feedback Form" />
<EditText
android:hint="Name"
android:id="@+id/editname"/>
<EditText
android:hint="Roll No."
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android:id="@+id/editrollno"/>
<EditText
android:hint="Class"
android:id="@+id/editclass"/>
<EditText
android:hint="Enter your Feedback"
android:lines="3"
android:id="@+id/editfeedback"/>
<Button
android:text="Submit Feedback"
</LinearLayout>
MapsActivity.java
package com.example.feedback;

Button submitBtn;
EditText std_name, std_rollno, std_class, std_feedback;
String sname, srollno, sclass, sfeedback, sql_query;
@Override
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submitBtn = (Button)findViewById(R.id.button);
std_name = (EditText)findViewById(R.id.editname);
std_rollno = (EditText)findViewById(R.id.editrollno);
std_class = (EditText)findViewById(R.id.editclass);
std_class = (EditText)findViewById(R.id.editfeedback);
submitBtn.setOnClickListener(new View.OnClickListener() {
@Override
sqLiteDatabaseObj = openOrCreateDatabase("FeedbaseDataBase",
sqLiteDatabaseObj.execSQL("CREATE TABLE IF NOT EXISTS
Student(id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, name
VARCHAR, rollno VARCHAR, class VARCHAR, feedback VARCHAR);");
sname = std_name.getText().toString();
srollno = std_rollno.getText().toString() ;
sclass = std_class.getText().toString();
sfeedback = std_class.getText().toString();
sql_query = "INSERT INTO Student (name, rollno, class, feedback)
VALUES('"+sname+"', '"+srollno+"', '"+sclass+"', '"+sfeedback+"')";
sqLiteDatabaseObj.execSQL(sql_query);
Toast.makeText(getApplicationContext(), "Feedback Submitted
Successfully", Toast.LENGTH_LONG).show();
}
});
}
}
c) Explain Geocoding and Reverse Geocoding with suitable example. 6M
Ans Geocoding is the process of transforming a street address or other description of a (Geocoding ,
location into a (latitude, longitude) coordinate. Reverse
Geocoding
Reverse geocoding is the process of transforming a (latitude, longitude) coordinate into a Explanation :
(partial) address. 3 M,
Example :
The amount of detail in a reverse geocoded location description may vary, for example 3M)
one might contain the full street address of the closest building, while another might
contain only a city name and postal code.
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The Geocoder class is used for handling geocoding and reverse geocoding.
activity_maps.xml
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:id="@+id/map"
android:name="com.google.android.gms.maps.SupportMapFragment"
tools:context="example.com.mapexample.MapsActivity">
<LinearLayout
android:orientation="horizontal">
<EditText
android:id="@+id/editText"
android:hint="Search Location" />
<Button
android: > android:text="Search" />
</LinearLayout>
</fragment>
AndroidManifest.xml
<uses-permission
android:name="android.permission.ACCESS_COARSE_LOCATION" />
MapsActivity.java
package example.com.mapexample;
import android.location.Address;
import android.location.Geocoder;
import android.os.Build;
import android.support.v4.app.FragmentActivity;
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import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.Marker;
import android.support.v4.content.ContextCompat;
import com.google.android.gms.location.LocationListener;
import java.io.IOException;
import java.util.List;
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback,

LocationListener,GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener{

Location mLastLocation;
Marker mCurrLocationMarker;
GoogleApiClient mGoogleApiClient;
LocationRequest mLocationRequest;
@Override
// Obtain the SupportMapFragment and get notified when the map is ready to be
used.
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@Override
mMap = googleMap;
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

}
}
else {
}
}
protected synchronized void buildGoogleApiClient() {
.addApi(LocationServices.API).build();
}
@Override
mLocationRequest = new LocationRequest();

mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
}
@Override
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@Override
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
mCurrLocationMarker = mMap.addMarker(markerOptions);
//move map camera

mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
//stop location updates

LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
@Override
public void searchLocation(View view) {

EditText locationSearch = (EditText) findViewById(R.id.editText);
String location = locationSearch.getText().toString();
List<Address> addressList = null;
if (location != null || !location.equals("")) {

Geocoder geocoder = new Geocoder(this);
try {
addressList = geocoder.getFromLocationName(location, 1);
} catch (IOException e) {
}
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Address address = addressList.get(0);
LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
mMap.addMarker(new MarkerOptions().position(latLng).title(location));
mMap.animateCamera(CameraUpdateFactory.newLatLng(latLng));
Toast.makeText(getApplicationContext(),address.getLatitude()+"
"+address.getLongitude(),Toast.LENGTH_LONG).show();
}
}
a) Design an android application to show the list of paired devices by Bluetooth. 6M
Ans activity_main.xml Layout file

<?xml version="1.0" encoding="utf-8"?> : 2M
<RelativeLayout Java File :
xmlns:android="http://schemas.android.com/apk/res/android" 3M
android:layout_width="match_parent" Manifest
file : 1M
tools:context=".MainActivity"
android:transitionGroup="true">
<Button
android:text="List all Paired devices"
android: > android:id="@+id/button1"/>
<TextView
android:text="Paired devices:"
android:textColor="#ff34ff06"
android:layout_below="@+id/button1" />
<ListView
android:id="@+id/listView"
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android:layout_alignParentBottom="true"
android:layout_below="@+id/textView1" />
</RelativeLayout>
AndroidManifest.xml
<manifest xmlns:androclass="http://schemas.android.com/apk/res/android"
package="com.example.bluetooth"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-
permission android:name="android.permission.BLUETOOTH_ADMIN" />
<application
android:icon="@drawable/ic_launcher"
<activity
android:name=" in.org.msbte.bluetooth.MainActivity"
<intent-filter>
</intent-filter>
</activity>
</application>
</manifest>
MainActivity.java
package in.org.msbte.bluetooth;
import android.bluetooth.BluetoothDevice;
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import java.util.ArrayList;
import java.util.Set;

Button b1;
private BluetoothAdapter BA;
private Set<BluetoothDevice>pairedDevices;
ListView lv;
@Override
b1 = (Button) findViewById(R.id.button1);
BA = BluetoothAdapter.getDefaultAdapter();
lv = (ListView)findViewById(R.id.listView);
}
public void list(View v){

pairedDevices = BA.getBondedDevices();
ArrayList list = new ArrayList();
for(BluetoothDevice bt : pairedDevices) list.add(bt.getName());

Toast.makeText(getApplicationContext(), "Showing Paired
Devices",Toast.LENGTH_SHORT).show();
final ArrayAdapter adapter = new

ArrayAdapter(this,android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
}
}
b) Develop an android application for sending Short Message Service (SMS). 6M
Ans activity_main.xml (XML file 3

marks Java
<?xml version="1.0" encoding="utf-8"?> file 3
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" Marks)
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
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<TextView
android:id="@+id/fstTxt"
android:text="Mobile No" />
<EditText
android:id="@+id/mblTxt"
android:ems="10"/>
<TextView
android:id="@+id/secTxt"
android:text="Message"
android:layout_marginLeft="100dp" />
<EditText
android:id="@+id/msgTxt"
android:ems="10" />
<Button
android:id="@+id/btnSend"
android:text="Send SMS" />
</LinearLayout>
MainActivity.java
package in.org.msbte.sendsmsexample;
import android.net.Uri;
import android.provider.Telephony;
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private EditText txtMobile;

private EditText txtMessage;
private Button btnSms;
@Override
txtMobile = (EditText)findViewById(R.id.mblTxt);
txtMessage = (EditText)findViewById(R.id.msgTxt);
btnSms = (Button)findViewById(R.id.btnSend);
btnSms.setOnClickListener(new View.OnClickListener() {
@Override
try{
SmsManager smgr = SmsManager.getDefault();
smgr.sendTextMessage(txtMobile.getText().toString(),null,txtMessage.getText().toString(),null,null);
Toast.makeText(MainActivity.this, "SMS Sent Successfully",
}
catch (Exception e){
Toast.makeText(MainActivity.this, "SMS Failed to Send, Please try again",
}
}
});
}
}
c) Explain how linear and frame layout is used to design an android application with 6M
suitable example.
Ans LinearLayout (2 M : For
each layout
• Android LinearLayout is a view group that aligns all children in either vertically explanation,
or horizontally. 1 M for
each layout
• Linear layout in Android allow us to arrange components horizontally in a single
example)
column or
vertically in a single row.
• Vertically or horizontally direction depends on attribute android: orientation.
• Linear layout is simple and easy to use, it creates a scroll bar if the length of the
window exceeds the length of the screen.
• Linear Layout are one of the simplest and common type of layouts used by
Android developers to keep controls within their interfaces. The linear layout
works as much as its name implies, it organizes the controls either a vertical or
horizontal pattern.
• When the layout’s orientation is set to vertical, all child controls within
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organized in a single column, and when the layout’s orientation is set to
horizontal, all child controls within in single row.
Example

<LinearLayoutandroid:layout_width="368dp"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
xmlns:android="http://schemas.android.com/apk/res/android">
<Button
android:text="Button1" />
<Button
<Button
<Button
</LinearLayout>
Frame Layout
• Frame Layout is designed to block out an area on the screen to display a single item.
Generally, FrameLayout should be used to hold a single child view, because it can be
difficult to organize child views in a way that's scalable to different screen sizes without
the children overlapping each other.
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• Frame layouts are one of the simplest layout types used to organize controls within the
user interface of an Android application. The purpose of FrameLayout is to allocate an
area of screen.
• Frame layouts are one of the most efficient types of layouts used by Android developers
to organize view controls. They are used less often than some other layouts, simply
because they are generally used to display only one view, or views which overlap.
• The frame layout is often used as a container layout, as it generally only has a single
child view (often another layout, used to organize more than one view).
Example

<FrameLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/framelayout"
<Button
android:text="Button"/>
<TextView
android:textSize="20sp"
android:background="@color/colorPrimary"
android:textColor="#fff"
android:text="I am TextView" />
</FrameLayout
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WINTER – 2023 EXAMINATION
Model Answer – Only for the Use of RAC Assessors
Subject Name: Mobile Application Development Subject Code: 22617

+Marathi), the Examiner shall consider the same and assess the answer based on matching of concepts with model
answer.
Q. Su Answer Marking Scheme

No b
. Q.
N.
a) List all tools and software’s required for developing an android 2M

application.
Ans  Android Studio Any 4 tools

 ADB (Android Debug Bridge)
One tool for ½ Mark
 AVD Manager
 Eclipse 2M
 Fabric
 FlowUp
 GameMaker: Studio
 Genymotion
 Gradle
 IntelliJ IDEA
b) Define emulator. 2M
Ans An Android emulator is a tool that creates virtual Android devices on your Correct Definition 2
computer. The emulator lets you prototype, develop and test Android applications M
without using a physical device.
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c) List any four attributes of layout. 2M
Ans  android:id Any 4 attributes
 android:layout_width
One attribute for ½
 android:layout_height
Mark
 android:layout_margin
 android:layout_marginTop 2M
 android:layout_marginBottom
 android:layout_marginLeft
 android:layout_marginRight
 android:background
d) Define Geocoding and Reverse Geocoding. 2M
Ans Geocoding : Geocoding:1 M

Geocoding is the process of transforming a street address or other description of a Reverse
location into a (latitude, longitude) coordinate. Geocoding:1 M
Reverse Geocoding :
Reverse geocoding is the process of transforming a (latitude, longitude) coordinate
into a (partial) address.
e) State intent. List types of intent. 2M
Ans Intent is the message that is passed between components such as activities. Definition 1 M
Android uses Intent for communicating between the components of an Application Types Listing 1 M
and also from one application to another application.
Types:
 Explicit Intent
 Implicit Intent
f) Write difference between toggle button and radio button. 2M
Ans For 2 points : 2 M
Toggle button Radio button
1. Toggle Button can be used to 1. Radio Buttons are used to choose a

display checked/unchecked single option from a list
(On/Off) state on the button.
2. For ON/OFF state two labels can 2. There is only one label for radio
be assign. button.
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g) Define: 2M
i)Fragment
ii) Broadcast receiver
Ans Fragment: Fragment :1 M
Fragment is the part of activity, it is also known as sub-activity.
Broadcast receiver :
1M
Broadcast receiver:
A broadcast receiver is a dormant component of the Android system. The Broadcast

Receiver’s job is to pass a notification to the user, in case a specific event occurs.

a) Explain relative layout with all its attributes. 4M
Ans In Relative Layout we need to specify the position of child views relative to each Explanation 1 M
other or relative to the parent. In case if we didn’t specify the position of child views,
by default all child views are positioned to top-left of the layout. Any three Attributes
with description- 3
Attributed of Relative Layout: M
Attribute Description
layout_alignParentTop If it specified “true”, the top edge of view will

match the top edge of parent.
layout_alignParentBottom If it specified “true”, the bottom edge of view

will match the bottom edge of parent.
layout_alignParentLeft If it specified “true”, the left edge of view will

match the left edge of parent.
layout_alignParentRight If it specified “true”, the right edge of view

will match the right edge of parent.
layout_centerInParent If it specified “true”, the view will be aligned

to center of parent.
layout_centerHorizontal If it specified “true”, the view will be

horizontally centre aligned within its parent.
layout_centerHorizontal If it specified “true”, the view will be
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vertically centre aligned within its parent.
layout_above It accepts another sibling view id and places

the view above the specified view id.
layout_below It accepts another sibling view id and places

the view below the specified view id.
layout_toLeftOf It accepts another sibling view id and places

the view left of the specified view id.
layout_toRightOf It accepts another sibling view id and places

the view right of the specified view id.
layout_toStartOf It accepts another sibling view id and places

the view to start of the specified view id.
layout_toEndOf It accepts another sibling view id and places

the view to end of the specified view id.
b) Explore all steps to install Android studio and SDK 4M

Ans Pre-Installation Check List Android studio
1. Before installing Android SDK, there is need to install Java Development Kit installation 2 M
(JDK). Ensure that JDK is at or above 1.8.
SDK installation
2. Uninstall older version(s) of "Android Studio" and "Android SDK", if any. 2M
We need to install two packages:
1. Android Studio (IDE), which is an Integrated Development
Environment (IDE)
2. Android SDK (Software Development Kit) for developing and
running Android apps.
Steps to install Android studio:
Download Android Studio
1. Click Download Android Studio. The Terms and Conditions page with
the Android Studio License Agreement opens.
2. Read the License Agreement.
3. At the bottom of the page, if you agree with the terms and conditions,
select the I have read and agree with the above terms and
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conditions checkbox.
4. Click Download Android Studio to start the download.
5. When prompted, save the file to a location where you can easily locate it,
such as the Downloads folder.
6. Wait for the download to complete.
Install Android Studio

a. Open the folder where you downloaded and saved the Android Studio
installation file.
b. Double-click the downloaded file.
c. If you see a User Account Control dialog about allowing the installation to
make changes to your computer, click Yes to confirm the installation.
d. Click Next to start the installation.
e. Accept the default installation settings for all steps.
2. Click finish when installation is done.
Installing Android SDK
Within Android Studio, you can install the Android SDK as follows:
1. Click Tools > SDK Manager.

2. In the SDK Platforms tab, select Android Tiramisu Preview.
3. In the SDK Tools tab, select Android SDK Build.
4. Click OK to install the SDK.
c) Explain the need of Android Operating System. Also describe any four 4M
features of android.
Ans Need of Android Operating System Need : 2 M
 Zero/negligible development cost: Any 4 features : 4

M
The development tools like Android SDK, JDK, and Eclipse IDE etc. are free
to download for the android mobile application development.
 Open Source:
The Android OS is an open-source platform based on the Linux kernel and

multiple open-source libraries. In this way developers are free to contribute or
extend the platform as necessary for building mobile apps which run on
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Android devices.
 Multi-Platform Support
In market, there are a wide range of hardware devices powered by the

Android OS, including many different phones and tablet. Even development
of android mobile apps can occur on Windows, Mac OS or Linux.
 Multi-Carrier Support
World wide a large number of telecom carriers like Airtel, Vodafone, Idea
Cellular, AT&T Mobility, BSNL etc. are supporting Android powered
phones.
 Open Distribution Model
Android Market place (Google Play store) has very few restrictions on the
content or functionality of an android app. So the developer can distribute
theirs app through Google Play store and as well other distribution channels
like Amazon’s app store.
Four features of android
1) Near Field Communication (NFC)
Most Android devices support NFC, which allows electronic devices to easily
interact across short distances.
2) Alternate Keyboards
Android supports multiple keyboards and makes them easy to install; the SwiftKey,
Skype, and 8pen apps all offer ways to quickly change up your keyboard style.
3) Infrared Transmission
The Android operating system supports a built-in infrared transmitter, allowing you
to use your phone or tablet as a remote control.
4) No-Touch Control
Using Android apps such as Wave Control, users can control their phones touch-free,
using only gestures.
5) Automation
The Tasker app controls the app permissions but also automate them
6) Wireless App Downloads
Using the Android Market or third-party options like AppBrain, we can download
apps on PC and then automatically sync them with Android, no plugging required.
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7) Storage and Battery Swap
Android phones also have unique hardware capabilities. Google’s OS makes it

possible to remove and upgrade your battery or to replace one that no longer holds a
charge
8) Custom Home Screens
While it’s possible to hack certain phones to customize the home screen, Android
comes with this capability from the get-go
9) Widgets
Apps are versatile, but sometimes you want information at a glance instead of having
to open an app and wait for it to load. Android widgets let you display just about any
feature you choose, right on the home screen—including weather apps, music
widgets, or productivity tools that helpfully remind you of upcoming meetings or
approaching deadlines.
d) Develop a program to add "Hello World" marker at (10 ,10) co- 4M

ordinates. Write only . java file.
Ans Activity_maps.xml Any correct logic

program 4 Marks
package com.example.googlemap;
public class MapsActivity extends FragmentActivity implements

OnMapReadyCallback {
@Override
// Obtain the SupportMapFragment and get notified when the map is ready to
be used.
}
@Override
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mMap = googleMap;
// Add a marker in Sydney and move the camera

LatLng hello = new LatLng(10,10);
mMap.addMarker(new MarkerOptions().position(hello).title("Marker Hello
World"));
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(mumbai,10F));
}
}
a) Describe service life cycle with its diagram. 4M
Ans A service is an application component which runs without direst interaction with Explanation 2 M,
Diagram 2 M
the user in the background.
● Services are used for repetitive and potentially long running operations, i.e.,
Internet downloads, checking for new data, data processing, updating content
providers and the like.
● Service can either be started or bound we just need to call either startService() or
bindService() from any of our android components. Based on how our service
was started it will either be “started” or “bound”
Service Lifecycle:
1. Started
a. A service is started when an application component, such as an activity, starts it by
calling startService().
b. Now the service can run in the background indefinitely, even if the component that
started it is destroyed.
2. Bound
a. A service is bound when an application component binds to it by calling
bindService().
b. A bound service offers a client-server interface that allows components to interact
with the service, send requests, get results, and even do so across processes with
InterProcess Communication (IPC).
c. Like any other components service also has callback methods. These will be
invoked while the service is running to inform the application of its state.
Implementing these in our custom service would help you in performing the right
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operation in the right state.
d. There is always only a single instance of service running in the app. If you are
calling startService() for a single service multiple times in our application it just
invokes the onStartCommand() on that service. Neither is the service restarted
multiple times nor are its multiple instances created.
1. onCreate():
This is the first callback which will be invoked when any component starts the
service. If the same service is called again while it is still running this method
Won’t be invoked. Ideally one time setup and intializing should be done in this
callback.
2. onStartCommand() /startSetvice()
This callback is invoked when service is started by any component by calling
startService(). It basically indicates that the service has started and can now run
indefinetly.
3. onBind()
To provide binding for a service, you must implement the onBind() callback
method. This method returns an IBinder object that defines the programming
interface that clients can use to interact with the service.
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4. onUnbind()
This is invoked when all the clients are disconnected from the service.
5. onRebind()
This is invoked when new clients are connected to the service. It is called after
onRebind
6. onDestroy()
This is a final clean up call from the system. This is invoked just before the
service is being destroyed.
b) Elaborate Android Security Model. 4M

Ans  The Android security model is primarily based on a sandbox and permission 2 M for explanation
mechanism. , 2 M for explaining
permissions, any 2
 Each application is running in a specific Dalvik virtual machine with a unique permissions
user ID assigned to it, which means the application code runs in isolation expected
from the code of all other applications.
 Therefore, one application has not granted access to other applications’ files.
 Android application has been signed with a certificate with a private key
Know the owner of the application is unique.
 This allows the author of the application will be identified if needed. When
an application is installed in the phone is assigned a user ID, thus avoiding it
from affecting it other applications by creating a sandbox for it.
 This user ID is permanent on which devices and applications with the same
user ID are allowed to run in a single process.
 This is a way to ensure that a malicious application has Cannot access /

compromise the data of the genuine application.
 It is mandatory for an application to list all the resources it will Access during
installation. Terms are required of an application, in the installation process
should be user-based or interactive Check with the signature of the
application

The purpose of a permission is to protect the privacy of an Android user.
Android apps must request permission to access sensitive user data (such as
contacts and SMS), as well as certain system features (such as camera and
internet). Depending on the feature, the system might grant the permission
automatically or might prompt the user to approve the request.
Permissions are divided into several protection levels. The protection level
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affects whether runtime permission requests are required. There are three
protection levels that affect third party apps: normal, signature, and
dangerous permissions.
Normal permissions: Normal permissions cover areas where your app needs
to access data or resources outside the app’s sandbox, but where there’s very
little risk to the user’s privacy or the operation of other apps. For example,
permission to set the time zone is a normal permission. If an app declares in
its manifest that it needs a normal permission, the system automatically
grants the app that permission at install time. The system doesn’t prompt the
user to grant normal permissions, and users cannot revoke these permissions.
Signature permissions: The system grants these app permissions at install
time, but only when the app that attempts to use permission is signed by the
same certificate as the app that defines the permission.
Dangerous permissions: Dangerous permissions cover areas where the app
wants data or resources that involve the user’s private information, or could
potentially affect the user’s stored data or the operation of other apps. For
example, the ability to read the user’s contacts is a dangerous permission. If
an app declares that it needs a dangerous permission, the user must explicitly
grant the permission to the app. Until the user approves the permission, your
app cannot provide functionality that depends on that permission. To use a
dangerous permission, your app must prompt the user to grant permission at
runtime. For more details about how the user is prompted, see Request
prompt for dangerous permission.
c) Write an xml file to create login page using Table Layout. 4M
Ans <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 M for correct

structure of Table
android:layout_width="match_parent" Layout , 2 M for
attributes
android:background="#000"
android:stretchColumns="1">
<TableRow android:padding="5dip">
<TextView
android:layout_span="2"
android:gravity="center_horizontal"
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android:text="@string/loginForm"
android:textColor="#0ff"
android:textStyle="bold" />
</TableRow>
<TableRow>
<TextView
android:layout_column="0"
android:text="@string/userName"
<EditText
android:id="@+id/userName"
android:background="#fff"
android:hint="@string/userName"
android:textColor="#000" />
</TableRow>
<TableRow>
<TextView
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android:text="@string/password"
<EditText
android:id="@+id/password"
android:background="#fff"
android:hint="@string/password"
android:textColor="#000" />
</TableRow>
<TableRow android:layout_marginTop="20dp">
<Button
android:id="@+id/loginBtn"
android:layout_gravity="center"
android:layout_span="2"
android:background="#0ff"
android:text="@string/login"
android:textColor="#000"
</TableRow>
</TableLayout>
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d) Develop an application to display analog Time Picker. Also display the 4M
selected time. (Write only . java file)
Ans MainActivity.java Code for display
time picker 2 M and
display time 2 M
TextView textview1;
TimePicker timepicker;
Button changetime;
@Override
textview1=(TextView)findViewById(R.id.textView1);
timepicker=(TimePicker)findViewById(R.id.timePicker);
//Uncomment the below line of code for 24 hour view
timepicker.setIs24HourView(true);
changetime=(Button)findViewById(R.id.button1);
textview1.setText(getCurrentTime());
changetime.setOnClickListener(new View.OnClickListener(){
@Override
textview1.setText(getCurrentTime());
}
});
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}
public String getCurrentTime(){
String currentTime="Current Time:
"+timepicker.getCurrentHour()+":"+timepicker.getCurrentMinute();
return currentTime;
}
}
a) Differentiate between JVM and DVM. (Any four points) 4M

Ans Any 4 points of
differences :1 M
DVM JVM each
It is Register based which is designed to It is Stack based.
run on low memory.
DVM uses its own byte code and runs JVM uses java byte code and runs
the “.Dex” file. From Android 2.2 SDK “.class” file having JIT (Just In Time).
Dalvik has got a Just in Time compiler
DVM has been designed so that a A single instance of JVM is shared with
device can run multiple instances of the multiple applications.
VM efficiently. Applications are given
their own instance
DVM supports the Android operating JVM supports multiple operating

system only. systems.
There is a constant pool for every It has a constant pool for every class.
application.
Here the executable is APK. Here the executable is JAR
b) Explain components of android directory structure. 4M
An The android project contains different types of app modules, source code files, and 1 M for each
s resource files. directory
Following are the components/ modules of android directory:
1) Manifests Folder
Manifests folder contains AndroidManifest.xml for creating our android
application. This file contains information about our application such as the
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Android version, metadata, states package for Kotlin file, and other
application components. It acts as an intermediator between android OS and
our application.
2) Java folder
The Java folder contains all the java source code (.java) files that we create
during the app development, including other Test files.
3) Resource (res) folder

The resource folder is the most important folder because it contains all the
non-code sources like images, XML layouts, and UI strings for our android
application.
 res/drawable folder
It contains the different types of images used for the development of
the application. We need to add all the images in a drawable folder for
the application development.
 res/layout folder
The layout folder contains all XML layout files which we used to
define the user interface of our application. It contains the
activity_main.xml file.
 res/mipmap folder
This folder contains launcher.xml files to define icons that are used to
show on the home screen. It contains different density types of icons
depending upon the size of the device such as hdpi, mdpi, xhdpi.
 res/values folder
Values folder contains a number of XML files like strings,
dimensions, colors, and style definitions. One of the most important
files is the strings.xml file which contains the resources.
4) Gradle Scripts folder

Gradle means automated build system and it contains a number of files that
are used to define a build configuration that can be applied to all modules in
our application. In build.gradle (Project) there are buildscripts and in
build.gradle (Module) plugins and implementations are used to build
configurations that can be applied to all our application modules.
c) Develop an android application using radio button. 4M
Ans [Consider any relevant example of Radio Button and in XML file, consider XML Code 2 M,
minimum attributes] Java Code 2 M
activity_main.xml
xmlns:tools=http://schemas.android.com/tools
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tools:context=".frame">
<TextView android:id="@+id/text1"
android:text="Radio Button"
android:textColor="#f00"/>
<RadioGroup android:id="@+id/group"
android:layout_below="@+id/text1">
<RadioButton android:id="@+id/male"
android:text="Male"/>
<RadioButton
android:id="@+id/female"
android:layout_below="@+id/male"
android:text="Female"/>
</RadioGroup>
<Button android:id="@+id/submit"
android:layout_below="@+id/group"
android:text="Submit" />
</RelativeLayout>
Java File:
package com.example.ifcdiv;
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import android.widget.RadioButton;
public class frame extends AppCompatActivity
RadioButton male,female;
Button b1;
@Override
protected void onCreate(Bundle savedInstanceState)
setContentView(R.layout.activity_frame);
male=findViewById(R.id.male);
female=findViewById(R.id.female);
b1=findViewById(R.id.submit);
b1.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
String selected; if(male.isChecked())

{
selected="You selected"+male.getText();
}
else
{
selected="You Selected"+female.getText();
}
Toast.makeText(getApplicationContext(),selected,Toast.LENGTH_LONG).show();
} });
}
}
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d) Develop an application to send and receive SMS. (Write only Java and 4M
permission tag in manifest file)
An Permissions and <receiver> tag required in AndroidManifest.xml (Permission 2 M,

s Java Code 2 M)
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS"/>
<uses-permission android:name="android.permission.WRITE_SMS"/>
<receiver
<intent-filter>
</intent-filter>
</receiver>
MainActivity.java
(Cosidering appropriate layout file with 2 edit text boxes namely for phone
number,
message and a button for sending sms)
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EditText et1,et2;
Button b1;
@Override
protected void onCreate (Bundle savedInstanceState) {
if(ContextCompat.checkSelfPermission(MainActivity.this,Manifest.permission.SEND_SMS)!=
{
}
@Override
try {
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}
catch(Exception e)
{
}
}
});
}
@Override
super.onStart();
IntentFilter filter=new
IntentFilter("android.provider.Telephony.SMS_RECEIVED");
}
@Override
super.onStop();
}
}
SmsReceiver.java
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SmsReceiver(){}
@Override
}
}
}
}
e) Draw and explain activity life cycle. 4M

Ans Activities have a predefined life-cycle methods as follows: Diagram 2 M,
Explanation 2 M
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onCreate (): Called then the activity is created. Used to initialize the activity, for
example create the user interface.
onStart ():called when activity is becoming visible to the user.
onResume (): Called if the activity get visible again and the user starts interacting
with the activity again. Used to initialize fields, register listeners, bind
to services, etc.
onPause (): Called once another activity gets into the foreground. Always called
before the activity is not visible anymore. Used to release resources or save
application data. For example you unregister listeners, intent receivers, unbind from
services or remove system service listeners.
onStop (): Called once the activity is no longer visible. Time or CPU intensive
shutdown operations, such as writing information to a database should be down in
the onStop() method. This method is guaranteed to be called as of API 11.
onDestroy (): called before the activity is destroyed.
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a) Develop a program to perform addition, subtraction, division, 6M

multiplication of two numbers and display the result. (Use appropriate
UI controls).
Ans Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and Any appropriate UI
fill all required details to create a new project. controls and layout
with correct
Step 2 − Add the following code to res/layout/activity_main.xml. activity_main.xml
file-3 M
MainActivity.java
file-3 M
android:padding="4dp">
<TextView
android:id="@+id/textResult"
android:background="#008080"
android:text="Code4Example"
<EditText
android:id="@+id/editNum1"
android:inputType="number"
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android:layout_centerInParent="true" />
<EditText
android:id="@+id/editNum2"
android:inputType="number"
android:layout_below="@+id/editNum1"
android:layout_centerInParent="true" />
<GridLayout
android:layout_centerInParent="true"
android:layout_below="@+id/editNum2"
android:columnCount="2"
android:rowCount="2"
<Button
android: > android:text="+" />
<Button
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android: > android:text="-" />
<Button
android: > android:text="*" />
<Button
android: > android:text="/" />
</GridLayout>
</RelativeLayout>
Step 3 − Add the following code to src/MainActivity.java

EditText editNum1,editNum2;
TextView textResult;
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@Override
editNum1= findViewById(R.id.editNum1);
editNum2= findViewById(R.id.editNum2);
textResult= findViewById(R.id.textResult);
}
public void btnAdd(View view){
double num1 = Double.parseDouble(editNum1.getText().toString());
double result = num1 + num2;
textResult.setText(Double.toString(result));
}
public void btnSub(View view){
double result = num1 - num2;
}
public void btnMul(View view){
double result = num1 * num2;
}
public void btnDiv(View view){
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double result = num1 / num2;
}
}
Output:
b) Develop an application to display a Google Map. (Write JAVA & 6M

Manifest file)
An AndroidManifest.xml code: correct Android

Manifest.xml file-3
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s <?xml version="1.0" encoding="utf-8"?> M
<manifest xmlns:android="http://schemas.android.com/apk/res/android" MapsActivity.java
package="example.com.mapexample"> file-3 M

<uses-
permission android:name="android.permission.ACCESS_FINE_LOCATION
" />
<uses-
permission android:name="android.permission.ACCESS_COARSE_LOCAT
ION" />
<application
 android:theme="@style/AppTheme">
 <meta-data
 android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />

 <activity
 android:name=".MapsActivity"
 android:label="@string/title_activity_maps">
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />

 <category android:name="android.intent.category.LAUNCHER" />
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 </intent-filter>
 </activity>
 </application>
 </manifest>
code of MapsActivity.java :
 package example.com.mapexample;

 import android.support.v4.app.FragmentActivity;
 import android.os.Bundle;
 import com.google.android.gms.maps.CameraUpdateFactory;
 import com.google.android.gms.maps.GoogleMap;
 import com.google.android.gms.maps.OnMapReadyCallback;
 import com.google.android.gms.maps.SupportMapFragment;
 import com.google.android.gms.maps.model.LatLng;
 import com.google.android.gms.maps.model.MarkerOptions;

public class MapsActivity extends FragmentActivity implements OnMapReadyC
allback{
 private GoogleMap mMap;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_maps);
// Obtain the SupportMapFragment and get notified when the map is ready to be used
.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragment

Manager()
 .findFragmentById(R.id.map);
 mapFragment.getMapAsync(this);
 }
 @Override
 public void onMapReady(GoogleMap googleMap) {
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 mMap = googleMap;
 // Add a marker in Sydney and move the camera
 LatLng sydney = new LatLng(-34, 151);
 mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sy
dney"));
 mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
 }
 }
c) Develop an application to convert thanks" text to speech as given in the 6M

following GUI.
Ans Code of activity_main.xml activity_main.xml

file- 2M
toolbar_title_layout.
<RelativeLayout xml file-1 M
MainActivity.java
xmlns:tools="http://schemas.android.com/tools" file-3 M
android:layout_height="match_parent" (Any other correct

android:paddingLeft="@dimen/activity_horizontal_margin" logic can be
considered)
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
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android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:transitionGroup="true">
<TextView
android:text="Android Text to Speech(TTS) Demo"
android:layout_below="@+id/textview"
android:textColor="#ff7aff24"
<EditText
android:id="@+id/editText"
android:layout_below="@+id/textView"
android:text="thanks"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentStart="true"
android:textColor="#ff7aff10"
android:textColorHint="#ffff23d1" />
<Button
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android:text="CLICK TO CONVERT TEXT TO SPEECH"
android:layout_below="@+id/editText"
</RelativeLayout>
Code of toolbar_title_layout.xml file
<TextView
android:text="TextToSpeechDemo"
android:textColor="@android:color/white"/>
</LinearLayout>
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Code of MainActivity.java.
package com.example.texttospeech.myapplication;
import android.speech.tts.TextToSpeech;
import java.util.Locale;
TextToSpeech t1;
EditText ed1;
Button b1;
@Override
getSupportActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CU
STOM);
getSupportActionBar().setCustomView(R.layout.toolbar_title_layout);
ed1=(EditText)findViewById(R.id.editText);
b1=(Button)findViewById(R.id.button);
t1=new TextToSpeech(getApplicationContext(), new

TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
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if(status != TextToSpeech.ERROR) {
t1.setLanguage(Locale.UK);
});
@Override
String toSpeak = ed1.getText().toString();
Toast.makeText(getApplicationContext(),
toSpeak,Toast.LENGTH_SHORT).show();
t1.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
});
public void onPause(){
if(t1 !=null){
t1.stop();
t1.shutdown();
super.onPause();
a) Develop an application to update a record of an employee whose emp.id is 6M

‘E101’ in SQlite database. Change employee name from “POR" to
“XYZ". Also display the updated record (Write .java and .xml files).
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Ans activity_update_emp.xml file activity_update
_emp.xmlfile-1 M
DBHandler.java
<LinearLayout file-2 M
xmlns:android="http://schemas.android.com/apk/res/android" empRVAdapter.java
file-1 M
Update java file- 2
M

<EditText
android:id="@+id/idEdtEmpName"
android:hint="Enter Employee Name" />

<EditText
android:id="@+id/idEdtEmpSalary"
android:hint="Enter Employee Salary" />


<Button
android:id="@+id/idBtnAddCourse"
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android:text="Add Employee"
android:textAllCaps="false" />
</LinearLayout>
DBHandler.java file
import android.content.ContentValues;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHandler extends SQLiteOpenHelper {
// creating a constant variables for our database.
// below variable is for our database name.
private static final String DB_NAME = "empdb";
// below int is our database version

private static final int DB_VERSION = 1;
// below variable is for our table name.

private static final String TABLE_NAME = "myemp";
// below variable is for our id column.

private static final String ID_COL = "id";
// below variable is for our course name column

private static final String NAME_COL = "emp_name";
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// below variable is for our employee salary column.
private static final String TRACKS_COL = "emp_salary";
// creating a constructor for our database handler.

public DBHandler(Context context) {
super(context, DB_NAME, null, DB_VERSION);
}
// below method is for creating a database by running a sqlite query
@Override
public void onCreate(SQLiteDatabase db) {
// on below line we are creating
// an sqlite query and we are
// setting our column names
// along with their data types.
String query = "CREATE TABLE " + TABLE_NAME + " ("
+ ID_COL + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+ NAME_COL + " TEXT,"
+ SALARY_COL + " TEXT)";
// at last we are calling a exec sql

// method to execute above sql query
db.execSQL(query);
}
// this method is use to add new EMPLOYEE to our sqlite database.

public void addNewCourse(String empName, String empSalary) {
// on below line we are creating a variable for
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// our sqlite database and calling writable method
// as we are writing data in our database.
SQLiteDatabase db = this.getWritableDatabase();
// on below line we are creating a
// variable for content values.
ContentValues values = new ContentValues();
// on below line we are passing all values

// along with its key and value pair.
values.put(NAME_COL, empName);
values.put(TRACKS_COL, empSalary);
// after adding all values we are passing

// content values to our table.
db.insert(TABLE_NAME, null, values);
// at last we are closing our

// database after adding database.
db.close();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// this method is called to check if the table exists already.
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
}
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empRVAdapter.java file
// creating variables for our edittext, button and dbhandler
private EditText empNameEdt, empSalaryEdt;
private Button addempBtn;
private DBHandler dbHandler;
@Override
// initializing all our variables.
empNameEdt = findViewById(R.id.idEdtempName);
empSalaryEdt = findViewById(R.id.idEdtempSalary);
addempBtn = findViewById(R.id.idBtnAddemp);
// creating a new dbhandler class
// and passing our context to it.
dbHandler = new DBHandler(MainActivity.this);
// below line is to add on click listener for our add emp button.
addCourseBtn.setOnClickListener(new View.OnClickListener() {
@Override
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// below line is to get data from all edit text fields.
String empName = empNameEdt.getText().toString();
String empSalary = empSalaryEdt.getText().toString();
// validating if the text fields are empty or not.
if (empName.isEmpty() && empSalary.isEmpty() &&) {
Toast.makeText(MainActivity.this, "Please enter all the data..",
return;
}
// on below line we are calling a method to add new
// employee to sqlite data and pass all our values to it.
dbHandler.addNewemp(empName, empSalary);
// after adding the data we are displaying a toast message.

Toast.makeText(MainActivity.this, "Employee has been added.",
empNameEdt.setText("");
empSalaryEdt.setText("");
}
});
}
}
Update employee record java file:

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public class UpdateCourseActivity extends AppCompatActivity {
// variables for our edit text, button, strings and dbhandler class.
private EditText empNameEdt, empSalaryEdt;
private Button updateempBtn;
private DBHandler dbHandler;
String empName, empSalary;
@Override
setContentView(R.layout.activity_update_emp);
// initializing all our variables.

empNameEdt = findViewById(R.id.idEdtempName);
empSalaryEdt = findViewById(R.id.idEdtempSalary);
updateempBtn = findViewById(R.id.idBtnUpdateemp);
// on below line we are initializing our dbhandler class.

dbHandler = new DBHandler(UpdateempActivity.this);
// on below lines we are getting data which

// we passed in our adapter class.
empName = getIntent().getStringExtra("emp_name");
empSalary = getIntent().getStringExtra("emp_salary");
// setting data to edit text
// of our update activity.
empNameEdt.setText(empName);
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empSalaryEdt.setText(empSalary);
// adding on click listener to our update course button.

updateempBtn.setOnClickListener(new View.OnClickListener() {
@Override
// inside this method we are calling an update employee

// method and passing all our edit text values.
dbHandler.updateemp(empName, empNameEdt.getText().toString(),
empSalaryEdt.getText().toString());
// displaying a toast message that our employee database has been updated.
Toast.makeText(UpdateempActivity.this, "Employee Record Updated..",
// launching our main activity.

Intent i = new Intent(UpdateempActivity.this, MainActivity.class);
startActivity(i);
}
});
}
}
b) i) Describe all steps in application deployment on google playstore. 6M
ii) Write steps for customized permissions.

Ans Application
a) Application deployment steps: deployment steps:3
M
Publishing is the general process that makes your Android app available to users.
When you publish an Android app on google play store, you do the following: Steps for
Customized
 Prepare the app for release. Permissions:3 M
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During the preparation step, you build a release version of your app.
 Release the app to users.
During the release step, you publicize, sell, and distribute the release version
of your app, which users can download and install on their Android-powered
devices.
Prepare your app for release
1)Preparing your app for release is a multistep process involving the following tasks:
 Configure your app for release.

At a minimum, you need to make sure that logging is disabled and removed
and that your release variant has debuggable false for Groovy
or isDebuggable = false for Kotlin script set. You should also set your app's
version information.
 Build and sign a release version of your app.
You can use the Gradle build files with the release build type to build and
sign a release version of your app. For more information, see Build and run
your app.
 Test the release version of your app.
Before you distribute your app, you should thoroughly test the release version
on at least one target handset device and one target tablet device. Firebase
Test Lab is useful for testing across a variety of devices and configurations.
 Update app resources for release.
Make sure that all app resources, such as multimedia files and graphics, are
updated and included with your app or staged on the proper production
servers.
 Prepare remote servers and services that your app depends on.
If your app depends on external servers or services, make sure they are secure
and production ready.
2) Signing of Application
 Application signing allows developers to identify the author of the
application and to update their application without creating complicated
interfaces and permissions.
 Every application that is run on the Android platform must be signed by the
developer.
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 Applications that attempt to install without being signed will be rejected by

either Google Play or the package installer on the Android device.
APK Signing Schemes

 v1 Scheme: based on JAR signing.
 v2 Scheme: APK Signature Scheme v2, which was introduced in Android
7.0.
 v3 Scheme: APK Signature Scheme v3, which was introduced in Android 9.
b) Steps for Customized Permissions:
1)App signing
All APKs must be signed with a certificate whose private key is held by their
developer. The certificate does not need to be signed by a certificate authority. It's
allowable, and typical, for Android apps to use self-signed certificates. The purpose
of certificates in Android is to distinguish app authors. This lets the system grant or
deny apps access to signature-level permissions and grant or deny an app's request to
be given the same Linux identity as another app.
2)Grant signature permissions after device manufacturing time
Starting in Android 12 (API level 31), the knownCerts attribute for signature-level
permissions lets you refer to the digests of known signing certificates at declaration
time.
You can declare the knownCerts attribute and use the knownSigner flag in your
app's protectionLevel attribute for a particular signature-level permission. Then, the
system grants that permission to a requesting app if any signer in the requesting app's
signing lineage, including the current signer, matches one of the digests that's
declared with the permission in the knownCerts attribute.
The knownSigner flag lets devices and apps grant signature permissions to other
apps without having to sign the apps at the time of device manufacturing and
shipment.
3)User IDs and file access
At install time, Android gives each package a distinct Linux user ID. The identity
remains constant for the duration of the package's life on that device. On a different
device, the same package might have a different UID—what matters is that each
package has a distinct UID on a given device.
Because security enforcement happens at the process level, the code of any two
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__________________________________________________________________________________________________
packages can't normally run in the same process, since they need to run as different
Linux users.
Any data stored by an app is assigned that app's user ID and isn't normally accessible
to other packages.
For example, an app that needs to control which other apps can start one of its
activities can declare a permission for this operation as follows:
<manifest
package="com.example.myapp" >
<permission
android:name="com.example.myapp.permission.DEADLY_ACTIVITY"
android:label="@string/permlab_deadlyActivity"
android:description="@string/permdesc_deadlyActivity"
android:permissionGroup="android.permission-group.COST_MONEY"
android:protectionLevel="dangerous" />
...
</manifest>
c) Develop a program to TURN ON and OFF bluetooth. 6M
Write .java file and permission tags.
Ans Code of MainActivity.java AndroidManifest.x
ml file-3 M
package com.example.bluetooth.myapplication;
MainActivity.java
import android.app.Activity; file-3 M
import android.bluetooth.BluetoothDevice;
import java.util.ArrayList;
import java.util.Set;

Button b1,b2,b3,b4;
private BluetoothAdapter BA;
private Set<BluetoothDevice>pairedDevices;
ListView lv;
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__________________________________________________________________________________________________
@Override
b1 = (Button) findViewById(R.id.button);
b2=(Button)findViewById(R.id.button2);
BA = BluetoothAdapter.getDefaultAdapter();
lv = (ListView)findViewById(R.id.listView);
}
public void on(View v){

if (!BA.isEnabled()) {
Intent turnOn = new
Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(turnOn, 0);
Toast.makeText(getApplicationContext(), "Turned
on",Toast.LENGTH_LONG).show();
} else {
Toast.makeText(getApplicationContext(), "Already on",
}
}
public void off(View v){

BA.disable();
Toast.makeText(getApplicationContext(), "Turned off"
,Toast.LENGTH_LONG).show();
}
public void visible(View v){

Intent getVisible = new
Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
startActivityForResult(getVisible, 0);
}
public void list(View v){

pairedDevices = BA.getBondedDevices();
ArrayList list = new ArrayList();
for(BluetoothDevice bt : pairedDevices) list.add(bt.getName());

Toast.makeText(getApplicationContext(), "Showing Paired
Devices",Toast.LENGTH_SHORT).show();
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__________________________________________________________________________________________________
final ArrayAdapter adapter = new
ArrayAdapter(this,android.R.layout.simple_list_item_1, list);
lv.setAdapter(adapter);
}
}
Permission Tags
AndroidManifest.xml file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.bluetooth.myapplication" >
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<application
<activity
android:name=".MainActivity"
<intent-filter>
</intent-filter>
</activity>
</application>
</manifest>
Page No: 48 | 48

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Zeal Education Society’s

ZEAL POLYTECHNIC, PUNE.

THIRD YEAR (TY)

DIPLOMA IN COMPUTER ENGINEERING

NAME OF SUBJECT: MOBILE APPLICATION DEVELOPMENT

MSBTE QUESTION PAPERS & MODEL ANSWERS

Q. Sub Answer Marking

1 Attempt any FIVE of the following: 10 M

a) List any four features of Android operating system. 2M

Ans Features of Android Operating System: (Any four, ½

d) List any four attributes of check box. 2M

Ans 1)id (Any four

f) State syntax to display built in zoom control. 2M

c) In any normal activity, ZoomControl can be displayed as component by following

Ans 1) MediaPlayer (Any two

2. Attempt any THREE of the following: 12 M

a) Describe Android architecture with diagram. 4M

• Android Runtime environment is an important part of Android rather than an internal

(i) The Surface manager library to provide a display management

(ii) SGL and OpenGL Graphics libraries for 2D and 3D graphics

drivers for the various hardware components of an Android device.

• Linux Kernel is responsible fro device drivers, power management, memory

b) Differentiate between DVM and JVM. 4M

Ans Any 4 points

c) List and elaborate steps to deploy an Android application on Google play 4M

Step 1: Create a Developer Account

Step 2: Plan to Sell? Link Your Merchant Account

Step 3: Create an App

Step 4: Prepare Store Listing

Step 5: Upload APK to an App Release

Step 6: Provide an Appropriate Content Rating

Step 7: Set Up Pricing & Distribution

Step 8: Rollout Release to Publish Your App

public class MainActivity extends AppCompatActivity {

3. Attempt any THREE of the following: 12 M

a) Write down the steps to install and configure Android studio. 4M

Ans Step 1: Go to https://developer.android.com/android-studio/download to get the Android (4 M for

Ans Text View: (Syntax of

● id: id is an attribute used to uniquely identify a image button. Below is the

c) Describe Android service life cycle along with diagram. 4M

Constructs a Geocoder localized for the default locale.

Geocoder(Context context, Locale locale)

Constructs a Geocoder localized for the given locale.

Methods with Syntax

public List<Address> getFromLocation (double latitude, double longitude, int

public void getFromLocation (double latitude, double longitude, int maxResults,

● public List<Address> getFromLocationName (String locationName, int

public static boolean isPresent ()

4. Attempt any THREE of the following: 12 M

b) Write a program to demonstrate Date and Time picker. 4M

public class MainActivity extends AppCompatActivity {

Android Multimedia Framework Architecture

d) Discuss developer console with at least four features 4M

e) Write a program to demonstrate declaring and using permissions with any 4M

public class MainActivity extends AppCompatActivity {

public class MainActivity extends AppCompatActivity {

b) Write a program to capture an image using camera and display it. 6M

public class MainActivity extends AppCompatActivity {

Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);