View控件跟随鼠标移动

public boolean onTouch(View view, MotionEvent motionEvent) {
        if(motionEvent.getAction() == MotionEvent.ACTION_DOWN){
            //记录按下时的数据
            sx = (int) motionEvent.getRawX();
            sy = (int) motionEvent.getRawY();
            origin_l = view.getLeft();
            origin_r = view.getRight();
            origin_b = view.getBottom();
            origin_t = view.getTop();
        }
        else if(motionEvent.getAction() == MotionEvent.ACTION_UP){
//                    Log.d(TAG, "onTouch: UP");
            // 得到imageView最开始的各顶点的坐标
            Toast.makeText(getContext(),String.valueOf(sx)+","+String.valueOf(sy),Toast.LENGTH_SHORT).show();
            view.layout(origin_l,origin_t,origin_r,origin_b);
        }
        else if(motionEvent.getAction() == MotionEvent.ACTION_MOVE){
            int x = (int) motionEvent.getRawX();
            int y = (int) motionEvent.getRawY();
            // 获取手指移动的距离
            int dx = x - sx;
            int dy = y - sy;
            // 得到imageView最开始的各顶点的坐标
            int l = view.getLeft();
            int r = view.getRight();
            int t = view.getTop();
            int b = view.getBottom();
            // 更改imageView在窗体的位置
            view.layout(l + dx, t + dy, r + dx, b + dy);
            // 获取移动后的位置
            sx = (int) motionEvent.getRawX();
            sy = (int) motionEvent.getRawY();
        }
        return true;
    }