android - 您如何检查是否有人触摸屏幕并向特定方向拖动？

Question

我想检查是否有人将手指放在屏幕中央并向右拖动，如何实现？

解决方案: http://www.codeshogun.com/blog/2009/04/16/how-to-implement-swipe-action-in-android/

Answer 1

您可以实现 onTouchListener 并执行如下操作:

public boolean onTouch(View view, MotionEvent event) {
  int currentX = event.getX();    

  if(event.getAction() == MotionEvent.ACTION_MOVE) {
    // oldX would be defined as a private property of the class (most likely an Activity)
    if(currentX > oldX) {
      // moving right

      oldX = currentX;
    } else {
      // moving left or not moving at all

      oldX = currentX;
    }
  }

  return true;
}

您或许可以尝试一下，让它按照您想要的方式工作。