Android Studio中的pong游戏

Question

我正在尝试同时移动两个桨：

@Override
public boolean onTouchEvent(MotionEvent event)
{
    switch (event.getAction())
    {
        case MotionEvent.ACTION_DOWN:
        case MotionEvent.ACTION_MOVE:
        {
            if(event.getY() > screenY/2)
            {
                playerPoint1.set((int)event.getX(), (int)event.getY());
            }

            else if(event.getY() < screenY/2)
            {
                playerPoint2.set((int)event.getX(), (int)event.getY());
            }
        }
    }
    return true;
}

但是我一次只能移动一个桨，您有什么想法，我应该如何修改此方法以使其正常工作？

Answer 1

对于有此问题的未来程序员：

    @Override
public boolean onTouchEvent(MotionEvent event)
{
    int num = event.getPointerCount();
    for (int a = 0; a < num; a++) {
        int x = (int) event.getX(event.getPointerId(a));
        int y = (int) event.getY(event.getPointerId(a));
        if(y > screenY/2)  playerPoint1.set(x, y);
        if(y < screenY/2)  playerPoint2.set(x, y);
    }
    return true;
}