小球从右底部漂移到左上部购物车

    @Override   protected void onCreate(Bundle savedInstanceState) {      super.onCreate(savedInstanceState);      setContentView(R.layout.activity_circle);      imageView = (ImageView) findViewById(R.id.my_cat);      shop = (Button) findViewById(R.id.shop);      shop.setOnClickListener(new OnClickListener() {         @Override         public void onClick(View v) {            int[] start_location = new int[2];// 一个整型数组，用来存储按钮的在屏幕的X、Y坐标            v.getLocationInWindow(start_location);// 这是获取购买按钮的在屏幕的X、Y坐标（这也是动画开始的坐标）            ImageView buyImg = new ImageView(getApplicationContext());// buyImg是动画的图片，我的是一个小球（R.drawable.sign）            buyImg.setImageResource(R.drawable.sign);// 设置buyImg的图片            setAnim(buyImg, start_location);// 开始执行动画                    }      });   }      private void setAnim(final View v, int[] start_location) {       ViewGroup anim_mask_layout = null;      anim_mask_layout = createAnimLayout();      anim_mask_layout.addView(v);//把动画小球添加到动画层      final View view = addViewToAnimLayout(anim_mask_layout, v,            start_location);      int[] end_location = new int[2];// 这是用来存储动画结束位置的X、Y坐标      imageView.getLocationInWindow(end_location);// shopCart是那个购物车      // 计算位移      int endX = end_location[0]- start_location[0];// 动画位移的X坐标      int endY = end_location[1] - start_location[1];// 动画位移的y坐标      TranslateAnimation translateAnimationX = new TranslateAnimation(0,            endX, 0, 0);      translateAnimationX.setInterpolator(new LinearInterpolator());      translateAnimationX.setRepeatCount(0);// 动画重复执行的次数      translateAnimationX.setFillAfter(true);      TranslateAnimation translateAnimationY = new TranslateAnimation(0, 0,            0, endY);      translateAnimationY.setInterpolator(new AccelerateInterpolator());      translateAnimationY.setRepeatCount(0);// 动画重复执行的次数      translateAnimationX.setFillAfter(true);      AnimationSet set = new AnimationSet(false);      set.setFillAfter(false);      set.addAnimation(translateAnimationY);      set.addAnimation(translateAnimationX);      set.setDuration(800);// 动画的执行时间      view.startAnimation(set);      // 动画监听事件      set.setAnimationListener(new AnimationListener() {         // 动画的开始         @Override         public void onAnimationStart(Animation animation) {            v.setVisibility(View.VISIBLE);         }         @Override         public void onAnimationRepeat(Animation animation) {            // TODO Auto-generated method stub         }         // 动画的结束         @Override         public void onAnimationEnd(Animation animation) {            v.setVisibility(View.GONE);         }      });   }      /**    * @Description: 创建动画层    * @param    * @return void    * @throws    */   private ViewGroup createAnimLayout() {      ViewGroup rootView = (ViewGroup) this.getWindow().getDecorView();      LinearLayout animLayout = new LinearLayout(this);      LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(            LinearLayout.LayoutParams.MATCH_PARENT,            LinearLayout.LayoutParams.MATCH_PARENT);      animLayout.setLayoutParams(lp);      animLayout.setId(Integer.MAX_VALUE);      animLayout.setBackgroundResource(android.R.color.transparent);      rootView.addView(animLayout);      return animLayout;   }   private View addViewToAnimLayout(final ViewGroup vg, final View view,         int[] location) {      int x = location[0];      int y = location[1];      LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(            LinearLayout.LayoutParams.WRAP_CONTENT,            LinearLayout.LayoutParams.WRAP_CONTENT);      lp.leftMargin = x;      lp.topMargin = y;      view.setLayoutParams(lp);      return view;   }}