WindowManager，查看动画副本

Question

我有一个可移动的视图。它也附加到windowmanager。我如何设法制作附加我的视图的窗口复制我视图的每个移动，以便它始终以我的视角移动？

我用它来移动我的观点：

private class MyTouchListener implements View.OnTouchListener{
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            switch (motionEvent.getAction()){
                case MotionEvent.ACTION_DOWN:
                    dX = view.getX() - motionEvent.getRawX();
                    dY = view.getY() - motionEvent.getRawY();
                    break;
                case MotionEvent.ACTION_MOVE:
                    view.animate()
                            .x(motionEvent.getRawX() + dX)
                            .y(motionEvent.getRawY() + dY)
                            .setDuration(0)
                            .start();
                    break;
                case MotionEvent.ACTION_UP:
                    if(view.getX()>(windowManager.getDefaultDisplay().getWidth()/2)){
                        view.animate().x(windowManager.getDefaultDisplay().getWidth() - view.getWidth())
                                .y(view.getY())
                                .setDuration(0)
                                .start();
                    }else{
                        view.animate().x(0)
                                .y(view.getY())
                                .setDuration(0)
                                .start();
                    }
                    break;
            }
            return true;
        }
    }

我将代码添加到窗口的代码：

        Button b = new Button(this);
        b.setBackground(getResources().getDrawable(R.drawable.round_button));
        b.setOnTouchListener(new MyTouchListener());
        windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
        params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.TYPE_SYSTEM_ERROR,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN,
                PixelFormat.TRANSLUCENT);
        windowManager.addView(b, params);