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First, I would like to apologize for my English. That's not my native language.

I have a simple gallery in Android. Images are loaded in GridView. I have problem with onItemClickListener and onTouchListener. I have set onItemClickListener for GridView and onTouchListener for childs of GridView (ImageViews). When I click on the image, it should be shown on the center of phone screen and when I press it, it should zoom-in on the place where my finger was and when I release my finger, it should zoom-out.

The problem is that when is set onTouchListener, only it is fired. I would like to recognize when I clicked and when I pressed-released.

Thank you for your help.

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1 回答 1

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您正在寻找检查event.getAction()返回MotionEvent常量的值：

gridView.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                //Do something when user touch the screen 
                //(first touch event-before moving or releasing the finger)
                break;
            case MotionEvent.ACTION_UP:
                //Do something when user release the finger touching the screen.
                break;
            }
            return false;
        }
    });

当用户在从屏幕上释放手指之前移动手指时，您也ACTION_MOVE存在这种情况（适合拖动等...）

编辑：

问题onTouch()在于它只存在于整个视图（您的网格）并且您没有onItemTouch(). 一种解决方案是从项目中获取您需要的信息，当它onItemClick()发生在类定义的变量中时（例如，您单击的图片），然后将其用于事件Bitmap中您需要的任何内容。onTouch()请记住，onTouch()如果您在任何时候返回 true，则意味着您已经处理了触摸案例并且onClick()不会发生。另外 - 仅在从屏幕上释放手指时单击调用（意味着MotionEvent.ACTION_UP），因此您不会在触摸事件中使用它。

要解决此问题，您需要改为使用onItemLongClick()，或onTouchListener使用自定义适配器（in 中getView()）为网格中的每个项目设置。

于 2013-04-28T15:48:41.390 回答