ExpandableListView基本使用

点击子列表改变父列表

MainActivity

public class MainActivity extends AppCompatActivity {

    List<String> group;           //组列表
    List<List<String>> child;     //子列表
    private ExpandableListView expandistView;
    private SortExpandableAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        expandistView = (ExpandableListView) findViewById(R.id.expandlistview);
        initializeData();

    }


    private void initializeData() {

        group = new ArrayList<>();
        child = new ArrayList<>();
        addInfo("汉朝", new String[]{"刘邦", "刘彻", "刘秀"});
        addInfo("唐朝", new String[]{"李渊", "李世民", "李那个啥"});
        addInfo("宋朝", new String[]{"赵匡胤", "赵构", "赵那个什么"});
        addInfo("明朝", new String[]{"朱元璋", "朱棣", "那个谁"});
        adapter = new SortExpandableAdapter(child, this, group);
        expandistView.setAdapter(adapter);
        expandistView.setGroupIndicator(null);

        expandistView.setOnGroupExpandListener(new ExpandableListView.OnGroupExpandListener() {
            @Override
            public void onGroupExpand(int groupPosition) {

                for (int i = 0, count = expandistView
                        .getExpandableListAdapter().getGroupCount(); i < count; i++) {

                    if (groupPosition != i) {// 关闭其他分组
                        expandistView.collapseGroup(i);
                    }
                }

            }
        });

        expandistView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
            @Override
            public boolean onChildClick(ExpandableListView expandableListViews, View view, int groupPosition, int i1, long l) {

                for (int j = 0; j < expandableListViews.getExpandableListAdapter().getGroupCount(); j++) {

                    if (groupPosition == j) {// 关闭分组
                        expandableListViews.collapseGroup(j);
                    }
                }
                String text = expandableListViews.getExpandableListAdapter().getChild(groupPosition, i1).toString();
                group.set(groupPosition, text);
                adapter.notifyDataSetChanged();

                return false;
            }
        });
    }

    /**
     * 模拟给组、子列表添加数据
     *
     * @param g-group
     * @param c-child
     */
    private void addInfo(String g, String[] c) {
        group.add(g);
        List<String> childitem = new ArrayList<String>();
        for (int i = 0; i < c.length; i++) {
            childitem.add(c[i]);
        }
        child.add(childitem);
    }
}

adapter

public class SortExpandableAdapter extends BaseExpandableListAdapter {

    Context context;
    List<String> group;           //组列表
    List<List<String>> child;     //子列表

    public SortExpandableAdapter(List<List<String>> child, Context context, List<String> group) {
        this.child = child;
        this.context = context;
        this.group = group;
    }

    //-----------------Child----------------//
    @Override
    public Object getChild(int groupPosition, int childPosition) {
        return child.get(groupPosition).get(childPosition);
    }

    @Override
    public long getChildId(int groupPosition, int childPosition) {
        return childPosition;
    }

    @Override
    public int getChildrenCount(int groupPosition) {
        return child.get(groupPosition).size();
    }

    @Override
    public View getChildView(int groupPosition, int childPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {


        final String string = child.get(groupPosition).get(childPosition);

        ViewHoldChild viewHoldChild = null;
        if (convertView==null){
            viewHoldChild = new ViewHoldChild();
            convertView = LayoutInflater.from(context).inflate(R.layout.view_childsort,null);
            viewHoldChild.textView_ch = (TextView) convertView.findViewById(R.id.text_a);
            convertView.setTag(viewHoldChild);
        }else {
            viewHoldChild= (ViewHoldChild) convertView.getTag();
        }

        viewHoldChild.textView_ch.setText(string);
        viewHoldChild.textView_ch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
              //  Toast.makeText(context,string,Toast.LENGTH_SHORT).show();

            }
        });

        return convertView;
    }

    //----------------Group----------------//
    @Override
    public Object getGroup(int groupPosition) {
        return group.get(groupPosition);
    }

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

    @Override
    public int getGroupCount() {
        return group.size();
    }

    @Override//父view
    public View getGroupView(int groupPosition, boolean isExpanded,
                             View convertView, ViewGroup parent) {
        final String string = group.get(groupPosition);
        ViewHoldChild viewHoldChild = null;

        if (convertView==null){
            viewHoldChild = new ViewHoldChild();
            convertView = LayoutInflater.from(context).inflate(R.layout.view_parentsort,null);
            viewHoldChild.textView_ch = (TextView) convertView.findViewById(R.id.text_b);
            convertView.setTag(viewHoldChild);
        }else {
            viewHoldChild= (ViewHoldChild) convertView.getTag();
        }

        viewHoldChild.textView_ch.setText(string);



        return convertView;
    }


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

    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) {
        return true;
    }


    class ViewHoldChild {
        TextView textView_ch;
    }

   
}