补间动画TweenAnimation

补间动画官方文档1
补间动画官方文档2

ImageView flower = (ImageView) findViewById(R.id.flower);
Button btn = (Button)findViewById(R.id.btn);
final Handler handler = new Handler(){
    public void handleMessage(Message msg){
        if (msg.what == 0x123){
          flower.startAnimation(reverse);
        }
    }
};

bn.setOnClickListener(new OnClickListener(){
    public void onClick(View view){
        flower.startAnimation(anim);
        new Timer().schedule(new TimerTask(){
            public void run(){
                handler.sendEmptyMessage(0x123);
            }
        },3500);
    }
};