Question

我有一个带有MultiChoice listView的ListFragment。我想将选择的数量限制为3.为此，我在onViewCreated中实现了MultiChoiceModeListener。出于某种原因，听众不工作？

然而; onListItemClick有效吗？

（作为替代方法：有没有办法在onListItemClick中跟踪已检查和未检查的限制为3？）

public class PinnedSectionListFrag extends ListFragment {...
...

   @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);

        setListAdapter(new SimpleAdapter(getActivity(), android.R.layout.simple_list_item_multiple_choice, android.R.id.text1));

        listView = getListView();

//        listView.setItemsCanFocus(false);
        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);

        listView.setMultiChoiceModeListener(new MultiChoiceModeListener() {
            @Override
            public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
                Log.e("PinnedSectionsList...","......"+position);
            }

            @Override
            public boolean onCreateActionMode(ActionMode mode, Menu menu) {
                return false;
            }

            @Override
            public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
                return false;
            }

            @Override
            public boolean onActionItemClicked(ActionMode mode, MenuItem item) {

                Log.e("PinnedSectionsList...","...item........"+item);

            }

            @Override
            public void onDestroyActionMode(ActionMode mode) {

            }
        });
    }

...

@Override // Working..
public void onListItemClick(ListView l, View v, int position, final long id) {
    Item item = (Item) getListView().getAdapter().getItem(position);
    if (item != null) {
        Toast.makeText(getActivity(), "Item " + position + ": " + item.text, Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(getActivity(), "Item " + position, Toast.LENGTH_SHORT).show();
        }
}...

- 感谢任何帮助/线索。

Answer 1

这可能对某些人有所帮助......我选择了替代方案并使用onListItemClick跟踪自己。

@Override
public void onListItemClick(ListView l, View v, int position, final long id) {
        if (selectedItems.size() < 2){
            selectedItems.add(item.text);
            if (selectedItems.size() == 1) {
                MyAppClass.getInstance().saveSharedSetting(getActivity(), "Titles", selectedItems.get(0));
            }else {

 MyAppClass.getInstance().saveSharedSetting(getActivity(), "Titles", TextUtils.join(", ", selectedItems));
            }

            Log.e("onListItemClick()","Read Titles..."+MyAppClass.getInstance().readSharedSetting(getActivity(), "Titles","TitlesRead"));
//
        }else {

                for (int i =0; i < selectedItems.size(); i++ ){
                    if (selectedItems.get(i) == item.text){
                        selectedItems.remove(i);
                    }
            }

            //                sparseBooleanArray.put(position, false);//.get(position) = false;
            getListView().setItemChecked(position, false);
            Toast.makeText(getActivity(), "Max 2 Items Reached ! - ", Toast.LENGTH_SHORT).show();
        }

ListFragment中的MultiChoiceModeListener不起作用？使用onListItemClick作为替代

1 个答案: