LoadingImageView.java 文件源码

@Override
protected void onFinishInflate() {
    super.onFinishInflate();
    ImageView target = (ImageView) findViewById(R.id.target);

    target.setImageResource(R.drawable.loading_anim);
    AnimationDrawable animationDrawable = (AnimationDrawable) target.getDrawable();
    animationDrawable.start();
}