android - 具有可变级别数的 ExpandableListView

Question

我正在尝试创建一个具有可变数量级别的 ExpandableListView，如下所示。

http://i.imgur.com/ukkCq7B.png

我按照这个例子创建了一个只有一级子级的 ExpandableListView:

https://gist.github.com/bowmanb/4052030

代码:

public class SavedTabsFragment extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.saved_tabs, null);
        ExpandableListView elv = (ExpandableListView) v.findViewById(R.id.list);
        elv.setAdapter(new SavedTabsListAdapter());
        return v;
    }

    public class SavedTabsListAdapter extends BaseExpandableListAdapter {

        private String[] groups = { "People Names", "Dog Names", "Cat Names", "Fish Names" };

        private String[][] children = {
            { "Arnold", "Barry", "Chuck", "David" },
            { "Ace", "Bandit", "Cha-Cha", "Deuce" },
            { "Fluffy", "Snuggles" },
            { "Goldy", "Bubbles" }
        };

        @Override
        public int getGroupCount() {
            return groups.length;
        }

        @Override
        public int getChildrenCount(int i) {
            return children[i].length;
        }

        @Override
        public Object getGroup(int i) {
            return groups[i];
        }

        @Override
        public Object getChild(int i, int i1) {
            return children[i][i1];
        }

        @Override
        public long getGroupId(int i) {
            return i;
        }

        @Override
        public long getChildId(int i, int i1) {
            return i1;
        }

        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup) {
            TextView textView = new TextView(SavedTabsFragment.this.getActivity());
            textView.setText(getGroup(i).toString());
            return textView;
        }

        @Override
        public View getChildView(int i, int i1, boolean b, View view, ViewGroup viewGroup) {
            TextView textView = new TextView(SavedTabsFragment.this.getActivity());
            textView.setText(getChild(i, i1).toString());
            return textView;
        }

        @Override
        public boolean isChildSelectable(int i, int i1) {
            return true;
        }

    }

}

如何创建具有可变级别数的 ExpandableListView？ ExpandableListView 是最好的选择吗？

Answer 1

This post解释了 3 级可扩展列表。希望这会有所帮助。

基本思想是，一级列表由 ExpandableListAdapter 支持。此适配器生成的 subview 本身是 ExpandableListAdapters，它们提供二级组和最终的子元素。