Android ExpandableListView实现下拉刷新和加载更多效果

<com.xingyi.elonggradletaskdemo.widget.SExpandableListView    android:listSelector="@android:color/transparent"    android:id="@+id/elv_coupon"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:dividerHeight="1dp">  </com.xingyi.elonggradletaskdemo.widget.SExpandableListView>

expandableListView = (SExpandableListView)         findViewById(R.id.elv_coupon);    // 在设置适配器之前设置是否支持下拉刷新    expandableListView.setLoadingMoreEnabled(true);    expandableListView.setPullRefreshEnabled(true);    expandableListView.setAdapter(couponAdapter);

expandableListView.setmLoadingListener(new SExpandableListView.LoadingListener() {      @Override      public void onLoadMore() {        // 模拟加载更多        isPull = false;        // 这里应该在项目中请求,这里用延时模拟接口请求        loadCount++;        Message msg = handler.obtainMessage();        msg.arg1 = loadCount;        handler.sendMessageDelayed(msg, 2000);        Log.e("TAG---HANDLER:", loadCount + "-->");      }      @Override      public void onRefresh() {        isPull = true;        loadCount++;        // 模拟接口请求下拉刷新        Message msg = handler.obtainMessage();        msg.arg1 = loadCount;        handler.sendMessageDelayed(msg, 2000);        Log.e("TAG---HANDLER:", loadCount + "-->");      }    });   private Handler handler = new Handler() {    @Override    public void handleMessage(Message msg) {      super.handleMessage(msg);      // 模拟接口回复数据,加入下拉刷新次数为6次的话我们就认为没有更多了      if (loadCount > 6) {        expandableListView.refreshComplete();        expandableListView.setNoMore(true);      } else {        addLoadMoreData();        if (isPull) {          expandableListView.refreshComplete();        }        couponAdapter.notifyDataSetChanged();        // 是不是全部展开,根据需求设置//        expanedAll();      }      Log.e("TAG---收到消息:", loadCount + "-->");    }  };

// 这里在自定view构造函数中调用的增加header和footer的代码,注意下两种添加方式的区别,详情见注释和源代码 private void initSE(Context context) {    /**     * 这里是footer的填充,注意指定他的父亲为当前的listview,     * 这里footer不用指定layoutparem是因为footer 在填充的时候已经指定了他的父view     */    loadMoreView = LayoutInflater.from(context).inflate(R.layout.item_footer_view, this, false);    loadMorePb = (ProgressBar) loadMoreView.findViewById(R.id.pb_loading);    loadMoreDesc = (TextView) loadMoreView.findViewById(R.id.tv_loadmore_desc);  }  @Override  public void setAdapter(ExpandableListAdapter adapter) {    if (pullRefreshEnabled) {      mRefreshHeader = new ArrowRefreshHeader(getContext());      mRefreshHeader.setProgressStyle(ProgressStyle.LineScale);      /**       * 注意一定要指定header的layoutparasm为 AbsListView,以为 header是 new出来的他默认的 layoutparm是当前header的类型,       * 如果我们不修改的话会报错 类型转化异常,       */      mRefreshHeader.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, AbsListView.LayoutParams.WRAP_CONTENT));      addHeaderView(mRefreshHeader);    }    if (loadingMoreEnabled) {      addFooterView(loadMoreView);    }    super.setAdapter(adapter);  }