An implementation of Coil's Decoder to support animated WebP on Android of which sdk version is less than 28. It depends on libwebp as a native library.

In your settings.gradle

dependencyResolutionManagement {
    repositories {
        maven {
            url "https://maven.pkg.github.com/skgmn/AnimatedWebPDecoder"
            credentials {
                username <Your GitHub ID>
                password <Your GitHub Personal Access Token>
            }
        }
    }
}

In your app/build.gradle

dependencies {
    implementation "com.github.skgmn:animatedwebpdecoder:0.1.2"
}

Simply add AnimatedWebPDecoder to your ImageLoader.Builder. As stated in here, it is recommended to use with io.coil-kt:coil-gif.

val imageLoader = ImageLoader.Builder(context)
    .componentRegistry {
        if (SDK_INT >= 28) {
            add(ImageDecoderDecoder(context))
        } else {
            add(AnimatedWebPDecoder())
        }
    }
    .build()

As it uses native library, it also needs proguard rules. Add these rules to your proguard-rules.pro.

-keep class com.github.skgmn.webpdecoder.libwebp.LibWebPAnimatedDecoder {
    java.nio.ByteBuffer byteBuffer;
    native <methods>;
}

-keep class com.github.skgmn.webpdecoder.libwebp.LibWebPAnimatedDecoder$Metadata {
    *;
}