我正在开发一款需要3个手指的安卓游戏。在我的设备（三星S3 mini，安卓4.1.2）上运行良好，getPointerCount（）返回3，但在另一台设备（三星酷睿Prime，安卓4.4.4）上，getPointerCount（）总是返回2，似乎在第3次触摸时没有调用函数onTouchEvent（MotionEvent e）。为什么会这样？谢谢帮助。
我用途：

class worldGL extends GLSurfaceView {
    world activity;
    world_r renderer;
    ctrl controller;

    public worldGL(Context context){
        super(context);

        this.renderer = new world_r(context);
        setRenderer(this.renderer);

        this.activity = (world) context;
        this.controller = new ctrl();
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        this.controller.setControllerStatus(e, this.renderer.width, this.renderer.height, this.renderer);

        return true;
    }
}

以及：

public void setControllerStatus(MotionEvent e, int width, int height, world_r renderer) {
    int pointerIndex = MotionEventCompat.getActionIndex(e);
    int pointerId = MotionEventCompat.getPointerId(e, pointerIndex);
    int xPos = (int) MotionEventCompat.getX(e, pointerIndex);
    int yPos = (int) MotionEventCompat.getY(e, pointerIndex);

    int maskedAction = MotionEventCompat.getActionMasked(e);

    Log.d("Index", Integer.toString(pointerIndex));
    Log.d("ID", Integer.toString(pointerId));
    Log.d("X", Integer.toString((int) e.getX(pointerIndex)));
    Log.d("Y", Integer.toString((int) e.getY(pointerIndex)));
    Log.d("Count", Integer.toString((int) e.getPointerCount()));

    switch (maskedAction) {
        case MotionEvent.ACTION_DOWN:
        case MotionEvent.ACTION_POINTER_DOWN: {
            //code                  
            break;
        }
        case MotionEvent.ACTION_MOVE: {
            //code      
            break;
        }
        case MotionEvent.ACTION_UP:
        case MotionEvent.ACTION_POINTER_UP: {
            //code                  
            break;
        }
        case MotionEvent.ACTION_OUTSIDE: {
            break;
        }
    }
}