XListView 的配置

最新推荐文章于 2018-10-12 20:11:02 发布

原创最新推荐文章于 2018-10-12 20:11:02 发布 · 253 阅读

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CC 4.0 BY-SA版权

本文介绍如何使用XListView实现Android应用中的下拉刷新功能。包括XML布局设置、Java代码实现、加载数据及适配器更新等关键步骤。

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1 首先要先粘贴3个Java文档一个箭头图片 2个String文件 3个xml布局
2 在mainActivity中布局
       <me.maxwin.view.XListView
            android:id="@+id/xListView"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:cacheColorHint="#00000000" >
        </me.maxwin.view.XListView>

3 Java代码
    3.1 找控件 mListView = (XListView) view.findViewById(R.id.xListView);
       mListView.setPullLoadEnable(true);
       // mAdapter = new ArrayAdapter<String>(this, R.layout.list_item, items);
       // mListView.setAdapter(mAdapter);
       // mListView.setPullLoadEnable(false);
       // mListView.setPullRefreshEnable(false);
       mListView.setXListViewListener(this);
       // mHandler = new Handler();
       isitData(1);
     3.2 实现implements IXListViewListener接口
       会出现2个方法
      private void onLoad() {
       mListView.stopRefresh();
       mListView.stopLoadMore();
       mListView.setRefreshTime("刚刚");
   }

   @Override
   public void onRefresh() {
       // TODO Auto-generated method stub
       mListView.stopRefresh();
       items.clear();
       isitData(0);
       mListView.setRefreshTime("刚刚");

   }

   @Override
   public void onLoadMore() {
       // TODO Auto-generated method stub
       isitData(++i);
       // 刷新适配器
       handler.postDelayed(new Runnable() {
           @Override
           public void run() {
//               adapter.notifyDataSetChanged();
               onLoad();
           }
       }, 2000);
   }
       3.3找数据
       private void isitData(final int pno) {
       new Thread() {
           public void run() {
               String spec = "http://v.juhe.cn/weixin/query?key=c936dc59b0d7716aa27328de11975dc2&pno="+ pno;
               try {
                   URL url = new URL(spec);
                   HttpURLConnection openConnection = (HttpURLConnection) url
                           .openConnection();
                   openConnection.setConnectTimeout(5000);
                   openConnection.setReadTimeout(5000);
                   int responseCode = openConnection.getResponseCode();
                   if (responseCode == 200) {
                       InputStream is = openConnection.getInputStream();
                       int len;
                       ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream();
                       byte[] by = new byte[1024];
                       while ((len = is.read(by)) != -1) {
                           arrayOutputStream.write(by, 0, len);
                       }
                       String string = arrayOutputStream.toString();
                       System.out.println(string);
                       handler.obtainMessage(STCCUE, string).sendToTarget();
                   }
               } catch (Exception e) {
                   // TODO Auto-generated catch block
                   e.printStackTrace();
               }
           };
       }.start();

   }
       3.4handler接收
                     if (msg.what == STCCUE) {
               String string = (String) msg.obj;
               Gson gson = new Gson();
               json = gson.fromJson(string, Sanxiaoxi.class);
               for (int i = 0; i < json.result.list.size(); i++) {
                   items.add(new Sanxiala(json.result.list.get(i).firstImg,
                           json.result.list.get(i).title, json.result.list
                                   .get(i).url));
               }
               if (adapter==null) {
                   adapter = new SanXlistviewAdapter(
                           ThirdFragment.this.getActivity(), items);
                   mListView.setAdapter(adapter);
               }else{
                   adapter.notifyDataSetChanged();
               }

           }
这样一个下拉刷新就解决了