android中带有自定义控件的ExpandableListView

Question

我正在开发一个具有书籍树结构的应用程序，我在带有可扩展列表视图的侧导航菜单中显示书籍名称，单击书籍名称时，它会显示子列表中的章节。但是，在我的情况下，我需要以不同的方式，当用户点击书名时，它应该打开 ChaptersFragment 并在那里显示章节列表，当用户点击展开图标时，章节应该显示在可展开列表中。

mDrawerListView.setOnGroupClickListener(new ExpandableListView.OnGroupClickListener() {

        @Override
        public boolean onGroupClick(ExpandableListView parent, View v,
                                    int groupPosition, long id) {

            return false;
        }
    });

    // Listview Group expanded listener
    mDrawerListView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {

        @Override
        public void onGroupExpand(int groupPosition) {

        }
    });

    // Listview Group collasped listener
    mDrawerListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {

        @Override
        public void onGroupCollapse(int groupPosition) {


        }
    });

    // Listview on child click listener
    mDrawerListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {

        @Override
        public boolean onChildClick(ExpandableListView parent, View v,
                                    int groupPosition, int childPosition, long id) {
            // TODO Auto-generated method stub

            return false;
        }
    });

Answer 1

您需要对 Activity 进行回调，以说明单击了哪个项目。然后activity需要获取信息来填充一个新的Fragment并使用FragmentManager来交换新的Fragment。

在 NavigationDrawerFragment 中：

private NavigationDrawerListener mCallback;

@Override
public void onAttach(Activity activity) {
    super.OnAttach(activity);

    try {
        mCallback = (NavigationDrawerListener) activity;
    } catch (ClassCastException e) {
        throw new ClassCastException("...");
    }
    ...
}
...
    @Override
    public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
        mCallback.onNavigationItemClicked(groupPosition);
    }
...
public static interface NavigationDrawerListerner {
    public void onNavigationItemClicked(int groupPosition)
}
...

在活动中

...
@Override
public void onNavigationItemClicked(int groupPosition) {
    Bundle args = getFragmentInformation(); //somehow
    Fragment newFragment = YourFragment.newInstance(args);
    getFragmentManager().beginTransaction().
            .replace(R.id.your_container), newFragment) //whatever ViewGroup contains the fragment
            .commit();
}
...