Android 3手指触摸检测

Question

我能够使用以下代码成功记录屏幕上触摸的两个手指的坐标:

case MotionEvent.ACTION_MOVE:
Log.d("TOUCH", "test ACTION MOVE" + event.getPointerCount());
Log.d("TOUCH", "test ACTION MOVE ID" + event.getPointerId(0) + " "+event.getPointerId(1));
if(event.getPointerCount()==3)
{

x0 = (int) event.getX(event.getPointerId(0));
y0 = (int) event.getY(event.getPointerId(0));
x1 = (int) event.getX(event.getPointerId(1));
y1 = (int) event.getY(event.getPointerId(1));
x2 = (int) event.getX(event.getPointerId(2));
y2 = (int) event.getY(event.getPointerId(2));

Log.d("TOUCH", "test ACTION DOWN " + " values = " + x0 + " " + y0 + " "
+ x1 + " " + y1+ " "+x2 + " " + y2);
}

但在上面的代码中,我无法在单个实例中检测到超过2个触摸点.甚至pointerCount()也永远不会超过2.

如何获得超过2个手指的触摸坐标？我在Android 2.2上运行此代码

Answer 1

前段时间有人问过这个问题，但无论如何。答案是，虽然 Android 可以跟踪 256 个手指，但当前的实现将其限制为 2 个手指。

我不确定蜂窝，但我猜它有同样的“问题”。