## 導入XListVIew第三方庫文件。通過LinkedList將刷新數據插入到集合頭部，將加載的數據放入集合尾部 ##  private Context context;  private View view;  private String path;  private XListView xlv;  private LinkedList<Data> listData;  private Handler handler = new Handler() {    @SuppressWarnings("unchecked")    public void handleMessage(android.os.Message msg) {      int code = msg.arg1;      if(msg.arg1==400){        Toast.makeText(context, "數據格式解析不正確", 0).show();      }      else{        NewsFragmentAdapter myAdapter = null;        switch (code) {        case 0:          // 默認          listData = (LinkedList<Data>) msg.obj;          myAdapter = new NewsFragmentAdapter(context, listData);          xlv.setAdapter(myAdapter);          break;        case 1:          LinkedList<Data> shualist = (LinkedList<Data>) msg.obj;          myAdapter = new NewsFragmentAdapter(context, shualist);          for (int i = 0; i < shualist.size(); i++) {            listData.addFirst(shualist.get(i));          }          myAdapter.notifyDataSetChanged();          stopLoadOrRefresh();          break;        case 2:          LinkedList<Data> loadlist = (LinkedList<Data>) msg.obj;          myAdapter = new NewsFragmentAdapter(context, loadlist);          for (int i = 0; i < loadlist.size(); i++) {            listData.addLast(loadlist.get(i));          }          myAdapter.notifyDataSetChanged();          stopLoadOrRefresh();          break;        default:          break;        }      }    };  };  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    context=getActivity();  }  @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {    view = inflater.inflate(R.layout.fragment, container, false);    path = getArguments().getString("path");    // 配置Xlist    xlv = (XListView) view.findViewById(R.id.xlv); // 獲得控件    xlv.setPullRefreshEnable(true);         // 設置可以下拉刷新    xlv.setPullLoadEnable(true);          // 設置可以上拉加載    xListViewListener();              // 調用XListView的監聽方法    if(path != null){      getMessage(path, 0);            // 調用方法請求數據    }    itemClickListner();               // 調用XListView條目點擊監聽方法    return view;  }  private void itemClickListner() {    xlv.setOnItemClickListener(new OnItemClickListener() {      @Override      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {        Intent intent=new Intent(context, WebViewActivity.class);        intent.putExtra("path", listData.get(arg2-1).article_url);        startActivity(intent);      }    });  }  public void xListViewListener() {    xlv.setXListViewListener(new IXListViewListener() {      // 當下拉刷新時實現的操作      @Override      public void onRefresh() {        getMessage(path, 1);  // 請求網絡，將新請求的內容加載到集合前端      }      // 當上拉加載時實現的操作內容      @Override      public void onLoadMore() { // 請求網絡，將請求的新內容加載到集合后端        getMessage(path, 2);      }    });  }  public void getMessage(String path, final int code) {    HttpUtils utils = new HttpUtils();    // 設置刷新間隔時間，如果不設置默認一分鐘后才能刷新出新內容    utils.configCurrentHttpCacheExpiry(0);    utils.send(HttpMethod.GET, path, new RequestCallBack<String>() {      // 請求網絡失敗回調的方法      @Override      public void onFailure(HttpException arg0, String arg1) {      }      // 請求網絡成功回調的方法      @Override      public void onSuccess(ResponseInfo<String> arg0) {        String info = arg0.result;        Gson gson = new Gson();        LinkedList<Data> list = gson.fromJson(info, ModelBean.class).data;        Message message = new Message();        if(list != null){          message.arg1 = code;          message.obj = list;        }else{          message.arg1=400;        }        handler.sendMessage(message);      }    });  }  private void stopLoadOrRefresh() {    // 停止加載    xlv.stopLoadMore();    // 停止刷新    xlv.stopRefresh();    // 最近一次刷新時間    xlv.setRefreshTime(getTime());  }  public String getTime() {    // 格式化時間    SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss");    Date date = new Date();    String time = format.format(date);    return time;  }