Android implements pull-up loading and pull-down refresh function through XListView

## Import XListVIew third-party library files.  Insert refresh data into the head of the collection through LinkedList, and put the loaded data into the tail of the collection ##  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( msg) {

      int code = msg.arg1;
      if(msg.arg1==400){
        (context, "Data format parsing is incorrect", 0).show();
      }
      else{
        NewsFragmentAdapter myAdapter = null;
        switch (code) {
        case 0:
          // default          listData = (LinkedList<Data>) ;
          myAdapter = new NewsFragmentAdapter(context, listData);
          (myAdapter);
          break;
        case 1:
          LinkedList<Data> shualist = (LinkedList<Data>) ;
          myAdapter = new NewsFragmentAdapter(context, shualist);
          for (int i = 0; i < (); i++) {
            ((i));
          }
          ();
          stopLoadOrRefresh();
          break;
        case 2:
          LinkedList<Data> loadlist = (LinkedList<Data>) ;
          myAdapter = new NewsFragmentAdapter(context, loadlist);
          for (int i = 0; i < (); i++) {
            ((i));
          }
          ();
          stopLoadOrRefresh();
          break;
        default:
          break;
        }
      }
    };
  };

  @Override
  public void onCreate(Bundle savedInstanceState) {
    (savedInstanceState);
    context=getActivity();
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    view = (, container, false);

    path = getArguments().getString("path");

    // Configure Xlist    xlv = (XListView) (); // Get the control    (true);         // Settings can be refreshed by pulling down    (true);          // Settings can be loaded    xListViewListener();              // Call the XListView's listening method
    if(path != null){
      getMessage(path, 0);            // Call method to request data    }

    itemClickListner();               // Call the XListView entry click listening method    return view;
  }

  private void itemClickListner() {

    (new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        Intent intent=new Intent(context, );
        ("path", (arg2-1).article_url);
        startActivity(intent);
      }
    });
  }

  public void xListViewListener() {
    (new IXListViewListener() {

      // Operations implemented when pull-down refresh      @Override
      public void onRefresh() {
        getMessage(path, 1);  // Request the network and load the content of the new request to the collection frontend      }

      // Operation content implemented when loading      @Override
      public void onLoadMore() { // Request the network and load the requested new content to the collection backend        getMessage(path, 2);
      }
    });

  }

  public void getMessage(String path, final int code) {

    HttpUtils utils = new HttpUtils();

    // Set the refresh interval time, if the default is not set, you can refresh the new content after one minute.    (0);

    (, path, new RequestCallBack<String>() {

      // Method for requesting a failed callback for network      @Override
      public void onFailure(HttpException arg0, String arg1) {
      }

      // Method to request successful callback from the network      @Override
      public void onSuccess(ResponseInfo<String> arg0) {
        String info = ;

        Gson gson = new Gson();
        LinkedList<Data> list = (info, ).data;
        Message message = new Message();
        if(list != null){
          message.arg1 = code;
           = list;
        }else{
          message.arg1=400;
        }
        (message);
      }
    });
  }

  private void stopLoadOrRefresh() {
    // Stop loading    ();
    // Stop refreshing    ();
    //Latest refresh time    (getTime());
  }

  public String getTime() {
    // Format time    SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss");
    Date date = new Date();
    String time = (date);
    return time;
  }