AnimatedImageView.java 文件源码

private void beginAnimation() {
    if (animId > 0) {
        anim = AnimationUtils.loadAnimation(getContext(), animId);
        startAnimation(anim);
    }
    if (animatorId > 0) {
        animator = AnimatorInflater.loadAnimator(getContext(), animatorId);
        animator.setTarget(this);
        animator.start();
    }
    Drawable drawable = getDrawable();
    if (drawable instanceof Animatable2) {
        if (callback != null) {
            ((Animatable2) drawable).registerAnimationCallback(callback);
        }
        ((Animatable2) drawable).start();
    }
}