触摸图标随着手指移动

最新推荐文章于 2021-05-27 14:35:27 发布

snow_zhang_123

最新推荐文章于 2021-05-27 14:35:27 发布

阅读量839

点赞数 2

本文链接：https://blog.youkuaiyun.com/innerwork/article/details/53434263

版权

mImageViewfloat.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        Log.d(TAG, "onTouch: mImageViewfloat" + event.getRawX() + "--" + event.getRawY());

        long l = 0;
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            downX = event.getRawX();
            downY = event.getRawY();
            l = System.currentTimeMillis();
            Log.d(TAG, "onTouch:downY +" + downX + "--" + downY);
        }

        if (event.getAction() == MotionEvent.ACTION_MOVE) {
            moveX = event.getRawX();
            moveY = event.getRawY();
            Log.d(TAG, "onTouch: moveY+" + moveX + "--" + moveY);
            float x = v.getX() + (moveX - downX);
            //到达边框的左右两边
            if ((x + v.getWidth()) >= width || x <= 0) {
                v.setX(v.getX());
            } else {
                v.setX(x);
            }
            float y = v.getY() + (moveY - downY);
            //到达边框的上下两边
            if ((y + v.getHeight()) >= height || y <= mListView.getTop()) {
                v.setY(v.getY());
            } else {
                v.setY(y);
            }
            downX = moveX;
            downY = moveY;
        }
        return false;
    }
});