This example shows how to use AnimationDrawable to construct a keyframe animation where each frame is shown for a specified duration.

KeyframeAnimation.java

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;

/**
 * This example shows how to use AnimationDrawable to construct a keyframe animation where each
 * frame is shown for a specified duration.
 *
 * Watch the associated video for this demo on the DevBytes channel of developer.android.com
 * or on YouTube at https://www.youtube.com/watch?v=V3ksidLf7vA.
 */
public class KeyframeAnimation extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_keyframe_animation);

        ImageView imageview = (ImageView) findViewById(R.id.imageview);

        // Create the AnimationDrawable in which we will store all frames of the animation
        final AnimationDrawable animationDrawable = new AnimationDrawable();
        for (int i = 0; i < 10; ++i) {
            animationDrawable.addFrame(getDrawableForFrameNumber(i), 300);
        }
        // Run until we say stop
        animationDrawable.setOneShot(false);

        imageview.setImageDrawable(animationDrawable);

        // When the user clicks on the image, toggle the animation on/off
        imageview.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                if (animationDrawable.isRunning()) {
                    animationDrawable.stop();
                } else {
                    animationDrawable.start();
                }
            }
        });
    }

    /**
     * The 'frames' in this app are nothing more than a gray background with text indicating
     * the number of the frame.
     */
    private BitmapDrawable getDrawableForFrameNumber(int frameNumber) {
        Bitmap bitmap = Bitmap.createBitmap(400, 400, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        canvas.drawColor(Color.GRAY);
        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        paint.setTextSize(80);
        paint.setColor(Color.BLACK);
        canvas.drawText("Frame " + frameNumber, 40, 220, paint);
        return new BitmapDrawable(getResources(), bitmap);
    }

}

Using AnimationDrawable class makes my app run on my emulator considerably slow. Did you notice that same performance issue too? Or is this issue related to the only emulator? Thanks in advance, great example by the way.