ImagesActivity.java 文件源码

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_images);

    AmbientMode.attachAmbientSupport(this);

    // Used to repeat animation from the beginning.
    mAnimationCallback =
            new AnimationCallback() {
                @Override
                public void onAnimationEnd(Drawable drawable) {
                    super.onAnimationEnd(drawable);
                    ((AnimatedVectorDrawable) drawable).start();
                }
            };

    // Play 'swipe left' animation on loop.
    ImageView mSwipeLeftImage = findViewById(R.id.swipe_left_image);
    mAnimatedVectorDrawableSwipe = (AnimatedVectorDrawable) mSwipeLeftImage.getDrawable();
    mAnimatedVectorDrawableSwipe.start();
    mAnimatedVectorDrawableSwipe.registerAnimationCallback(mAnimationCallback);

    // Play 'tap' animation on loop.
    ImageView mTapImage = findViewById(R.id.tap_image);
    mAnimatedVectorDrawableTap = (AnimatedVectorDrawable) mTapImage.getDrawable();
    mAnimatedVectorDrawableTap.start();
    mAnimatedVectorDrawableTap.registerAnimationCallback(mAnimationCallback);
}