listView.getSelectedItemPosition（）的返回指数-1 [英] listView.getSelectedItemPosition() return index-1

问题描述

我有我的自定义列表视图，并在每一行结束时，我必须要的ImageView从列表中删除该行，但是当我点击这个图片上我得到Arryindesoutofboundexception：长度= 681 indez = -1

帮助我

 私人OnClickListener imageviewClickListener =新OnClickListener（）{
  @覆盖
  公共无效的onClick（视图v）
  {
      INT指数;
        指数= listView.getSelectedItemPosition（）; // itemsListView是列表视图
        dataAdapter.remove（topicsList.get（指数））;
        topicsList.clear（）;
        dataAdapter.notifyDataSetChanged（）;
  }
};
 

未选中解决方案

您的项目，因为图像拦截触摸事件，因此所选择的位置是-1。
为了使这项工作，你需要告诉OnClickListener它属于什么项目：

 私有静态类MyClickListener实现OnClickListener {
    私人最终诠释MINDEX;    私人MyClickListener（INT指数）{
        MINDEX =指数;
    }    @覆盖
    公共无效的onClick（视图v）{
        dataAdapter.remove（topicsList.get（MINDEX））;
        topicsList.clear（）;
        dataAdapter.notifyDataSetChanged（）;
    }
}
 

I have my custom listview and at the end of each row I have ImageView to delete that row from the list but when I click on this image I get "Arryindesoutofboundexception: length=681 indez=-1"

Help me

private OnClickListener imageviewClickListener = new OnClickListener() {
  @Override
  public void onClick(View v) 
  {
      int index;
        index=listView.getSelectedItemPosition();//itemsListView is the listview
        dataAdapter.remove(topicsList.get(index));
        topicsList.clear();
        dataAdapter.notifyDataSetChanged();


  }
};

解决方案

Your item isn't selected because the image intercepts the touch event, therefore the selected position is -1. In order to make this work you need to tell the OnClickListener what item it belongs to:

private static class MyClickListener implements OnClickListener {
    private final int mIndex;

    private MyClickListener (int index) {
        mIndex = index;
    }

    @Override
    public void onClick(View v) {
        dataAdapter.remove(topicsList.get(mIndex));
        topicsList.clear();
        dataAdapter.notifyDataSetChanged();
    }
}

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