Android多点触控 [英] Android Multi Touch

问题描述

因此，我正在尝试使用onTouchEvent检查多个屏幕触摸，但它似乎仍然只能读取第一个触摸.有人可以帮忙吗? 这是我的代码:

So, I am trying to check multiple screen touches with an onTouchEvent, but it still only seems to read the first touch. Can anyone help? Here is my code:

public boolean onTouchEvent(MotionEvent e)
{
    int num = e.getPointerCount();
    for(int a = 0;a<num;a++)
    {
    int x = (int) e.getX(e.getPointerId(a));
    int y = (int) e.getY(e.getPointerId(a));
    check(x,y);
    }

    return false;
}

我浏览了很多这样的论坛，但是大多数与多点触控相关的主题都是关于缩放的.

I looked over a lot of these forums, but most of the multi touch related topics were about zooming.

推荐答案

您的代码在我的设备(Nexus S，Android 2.3)上运行良好.它会读取所有触摸.

Your code works well on my device (Nexus S, Android 2.3). It reads all touches.

这是测试代码:

  public boolean onTouchEvent(MotionEvent e) {
    int num = e.getPointerCount();
    for (int a = 0; a < num; a++) {
      int x = (int) e.getX(e.getPointerId(a));
      int y = (int) e.getY(e.getPointerId(a));
      Log.d(TAG, "pointer_" + e.getPointerId(a) + ": x = " + x
          + ", y = " + y);
    }
    return false;
  }

这是日志(用五根手指触摸):

Here is the log (touch with 5 fingers):

11-09 17:32:55.542: D/Touch(20594): pointer_0: x = 169, y = 613
11-09 17:32:55.542: D/Touch(20594): pointer_1: x = 407, y = 289
11-09 17:32:55.542: D/Touch(20594): pointer_2: x = 62, y = 441
11-09 17:32:55.542: D/Touch(20594): pointer_3: x = 251, y = 202
11-09 17:32:55.542: D/Touch(20594): pointer_4: x = 132, y = 256

您的Android设备和操作系统版本是什么?

What is your Android device and OS version?

这篇关于Android多点触控的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！