Question

我有一个包含多个项目的列表视图。单击某个项目时，将打开一个“活动”。但是，当我在项目上快速点击几次时，与其相关的活动会被打开几次。如何只打开一次项目？

我使用以下代码：

private OnItemClickListener newsfeedClickHandler = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        MyObject newsfeed = adapter.getItem(position);
        onNewsfeedClick(newsfeed);
    }
};
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_newsfeed, container, false);
    ...
    listView = (ListView) view.findViewById(R.id.newsfeeds);
    listView.setOnItemClickListener(newsfeedClickHandler);
    listView.setAdapter(adapter);
    ...
    return view;
}
private void onNewsfeedClick(MyObject newsfeed) {
    Intent intent = createIntent(newsfeed);
    startActivity(intent);
}

Answer 1

阻止调用ListView项目的正确方法是（显然）禁用OnItemClickListener：

private void onNewsfeedClick(MyObject newsfeed) {
    listView.setOnItemClickListener(null);
    Intent intent = createIntent(newsfeed);
    startActivity(intent);
}

当此活动再次可见时，将侦听器重置为onResume。

@Override
protected void onResume() {
    super.onResume();
    listView.setOnItemClickListener(newsfeedClickHandler);
}

Answer 2

维护一个布尔值，说isItemClicked并在返回列表视图时重置它。

private boolean isItemClicked;
  private OnItemClickListener newsfeedClickHandler = new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
      if (!isItemClicked) {
        isItemClicked = true;
        MyObject newsfeed = adapter.getItem(position);
        onNewsfeedClick(newsfeed);
      }
    }
  };

  private void resetIsItemClicked() {
    isItemClicked = false;
  }

Answer 3

要防止对ListView项目进行多次单击，请在listview单击侦听器中添加以下代码：

if (SystemClock.elapsedRealtime() - mLastClickTimeListViewItem < 1000){
    return;
}

Android listview多次点击项目

3 个答案: