Biometric-Auth-Sample

Add Biometric Authentication to any Android app

This library provides an easy way to implement fingerprint authentication without having to deal with all the boilerplate stuff going on inside.

How to integrate the library in your app?

dependencies {
        implementation(group: 'com.an.biometric', name: 'biometric-auth', version: '0.1.0', ext: 'aar', classifier: '')
}

Usage

new BiometricManager.BiometricBuilder(MainActivity.this)
                        .setTitle("Add a title")
                        .setSubtitle("Add a subtitle")
                        .setDescription("Add a description")
                        .setNegativeButtonText("Add a cancel button")
                        .build()
                        .authenticate(biometricCallback);

The BiometricCallback class has the following callback methods:

new BiometricCallback() {
              @Override
              public void onSdkVersionNotSupported() {
                     /*  
                      *  Will be called if the device sdk version does not support Biometric authentication
                      */
               }

               @Override
               public void onBiometricAuthenticationNotSupported() {
                     /*  
                      *  Will be called if the device does not contain any fingerprint sensors 
                      */
               }

               @Override
               public void onBiometricAuthenticationNotAvailable() {
                    /*  
                     *  The device does not have any biometrics registered in the device.
                     */
               }

               @Override
               public void onBiometricAuthenticationPermissionNotGranted() {
                      /*  
                       *  android.permission.USE_BIOMETRIC permission is not granted to the app
                       */
               }

               @Override
               public void onBiometricAuthenticationInternalError(String error) {
                     /*  
                      *  This method is called if one of the fields such as the title, subtitle, 
                      * description or the negative button text is empty
                      */
               }

               @Override
               public void onAuthenticationFailed() {
                      /*  
                       * When the fingerprint doesn’t match with any of the fingerprints registered on the device, 
                       * then this callback will be triggered.
                       */
               }

               @Override
               public void onAuthenticationCancelled() {
                       /*  
                        * The authentication is cancelled by the user. 
                        */
               }

               @Override
               public void onAuthenticationSuccessful() {
                        /*  
                         * When the fingerprint is has been successfully matched with one of the fingerprints   
                         * registered on the device, then this callback will be triggered. 
                         */
               }

               @Override
               public void onAuthenticationHelp(int helpCode, CharSequence helpString) {
                         /*  
                          * This method is called when a non-fatal error has occurred during the authentication 
                          * process. The callback will be provided with an help code to identify the cause of the 
                          * error, along with a help message.
                          */
                }

                @Override
                public void onAuthenticationError(int errorCode, CharSequence errString) {
                         /*  
                          * When an unrecoverable error has been encountered and the authentication process has 
                          * completed without success, then this callback will be triggered. The callback is provided 
                          * with an error code to identify the cause of the error, along with the error message. 
                          */
                 }
              });