android - fragment 内 fragment 中的上下文菜单(ActionMode)

Question

我在 Activity 的 Fragment A 中得到了 Fragment B。按预期工作。单击 fragment B 中的项目时，我想显示 contextual menu栏。

我正在与 ActionbarSherlock 合作。我在 Fragment B 中做了什么:

private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu) {
        MenuInflater inflater = mode.getMenuInflater();
        inflater.inflate(R.menu.entry_list_context_menu, menu);
        return true;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
        // make sure no item is selected when bar is shown
        adapter.clearSelection();
        adapter.notifyDataSetChanged();
        return false;
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
        Log.d("EntryList", "Item '" + item.getTitle()
                + "' clicked [onActionItemClicked()]");
        return true;
    }

    @Override
    public void onDestroyActionMode(ActionMode mode) {
        adapter.clearSelection();
        adapter.notifyDataSetChanged();
        contextualMode = null;
    }
};
private ActionMode contextualMode;

@Override
public void onItemClick(AdapterView<?> parentView, View itemView,
        int index, long id) {
    DocumentEntity entry = (DocumentEntity) itemView.getTag();
    // something went wrong
    if (entry == null) {
        Log.e("EntryList", "Tag-Less item clicked [onItemClick()]");
        return;
    }

    if (contextualMode != null) {
        Log.d("EntryList",
                "contextualMode is not yet initialized [onItemClick()]");
        contextualMode = getSherlockActivity().startActionMode(
                mActionModeCallback);
    } else {
        Log.d("EntryList",
                "contextualMode already initialized [onItemClick()]");
    }

    entry.setSelected(!entry.isSelected());
    Log.d("EntryList", "entry.selected set to " + entry.isSelected()
            + " [onItemClick()]");
}

选择效果很好，但没有显示上下文操作栏。调试结果为:

contextualMode already initialized [onItemClick()] entry.selected set to 'true' [onItemClick()]

没有设置contextualMode的其他位置...

Answer 1

I got a Fragment B in a Fragment A...

Android 不支持将 fragment 嵌入到另一个 fragment 中。对不起。这让我相信你的问题超出了你的上下文 ActionBar 没有被显示的事实。我建议您澄清您的原始帖子。