安卓 : MultiChoiceModeListener not invoked inside ListFragment

Question

对于基于 ICS 的应用程序，我创建了一个 ListFragment，它又使用 BaseAdapter 实现。我启用了 MultiChoiceModeListener() 以显示上下文操作栏。但这里的问题是，每当我检查 CheckBox 或长按 Label(两者都在 BaseAdapter 的 View 集中)时，根本不会调用 MultiChoiceModeListener 实现。非常感谢任何形式的帮助，因为在尝试了很多选项后我完全陷入困境!!!

public class ActivitiesFragment extends ListFragment {

public void onActivityCreated(Bundle savedInstanceState) {
    Log.d(TAG, "Entering onActivityCreated()");
    super.onActivityCreated(savedInstanceState);

    this.setAdapter();
    this.setHasOptionsMenu(true);
}

private void setAdapter() {

    HashMap<String, String> activities = DBAdapter
            .getInstance(this.context).getActivities();
    setListAdapter(new ActivitiesList(Util.sortByComparator(activities)));

    ListView listView = getListView();
    listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
    listView.setMultiChoiceModeListener(new MultiSelectionListener());

}

private class ActivitiesList extends BaseAdapter {
    // Other functions declared
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ActivityView view = null;
        String activityName = this.activityList.get(position);
        String colour = this.activities.get(activityName);

        if (convertView == null) {
            // ActivityView is a LinearLayout with CheckBox, Label and a Button
            view = new ActivityView(context, activityName, colour);

        } else {
            view = (ActivityView) convertView;
            view.setActivityName(activityName);
        }
        return view;
    }
}

private class MultiSelectionListener implements MultiChoiceModeListener {
    // implementation
}

}

Answer 1

您需要使用 ActionMode.Callback。 You should read through these docs ，它实际上使用起来非常简单。