二级列表的使用，上拉刷新，下拉加载

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首先要先导一个modlue,刷新的。

然后布局中：注意：

<com.handmark.pulltorefresh.library.PullToRefreshExpandableListView    android:id="@+id/list_expand"    android:layout_width="match_parent"    android:layout_height="match_parent"></com.handmark.pulltorefresh.library.PullToRefreshExpandableListView>

在代码中：

private PullToRefreshExpandableListView list_expand;private String[] str;private String[][] strr;private Handler handler=new Handler();@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    initview();    getserdata();    list_expand.setMode(PullToRefreshBase.Mode.BOTH);       list_expand.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ExpandableListView>() {           @Override           public void onPullDownToRefresh(PullToRefreshBase<ExpandableListView> refreshView) {               handler.postDelayed(new Runnable() {                   @Override                   public void run() {                      list_expand.onRefreshComplete();                   }               },2000);           }           @Override           public void onPullUpToRefresh(PullToRefreshBase<ExpandableListView> refreshView) {               handler.postDelayed(new Runnable() {                   @Override                   public void run() {                       list_expand.onRefreshComplete();                   }               },2000);           }       });    myadpter m1=new myadpter();    list_expand.getRefreshableView().setAdapter(m1);}private void initview() {    list_expand = (PullToRefreshExpandableListView) findViewById(R.id.list_expand);}public void getserdata() {    str = new String[]{"三国","水浒","西游","红楼"};    strr = new String[][]{{"张飞","关羽","刘备"},{"宋江","李逵","林冲"},{"孙悟空","唐僧","猪八戒","沙和尚"},{"贾宝玉","林黛玉"}};}class myadpter extends BaseExpandableListAdapter{    @Override    public int getGroupCount() {        return str.length;    }    @Override    public int getChildrenCount(int groupPosition) {        return strr[groupPosition].length;    }    @Override    public Object getGroup(int groupPosition) {        return str[groupPosition];    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return strr[groupPosition][childPosition];    }    @Override    public long getGroupId(int groupPosition) {        return 0;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return 0;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {               convertView=View.inflate(MainActivity.this,R.layout.group_activity,null);               TextView text= (TextView) convertView.findViewById(R.id.text_group);             text.setText(str[groupPosition]);        return convertView;    }    @Override    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        convertView=View.inflate(MainActivity.this,R.layout.child_activity,null);        TextView text= (TextView) convertView.findViewById(R.id.text_child);        text.setText(strr[groupPosition][childPosition]);        return convertView;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return false;    }}

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