<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="match_parent"   android:layout_height="match_parent"   android:orientation="vertical" >   <EditText     android:id="@+id/chat_text"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:layout_margin="20dp"     android:gravity="top"     android:inputType="textMultiLine"     android:text="" />  </LinearLayout>

package com.loan.zhironghuimobile;  import org.json.JSONArray;  import com.zsoft.SignalA.Hubs.HubConnection; import com.zsoft.SignalA.Hubs.HubOnDataCallback; import com.zsoft.SignalA.Hubs.IHubProxy; import com.zsoft.SignalA.Transport.StateBase; import com.zsoft.SignalA.Transport.Longpolling.LongPollingTransport;  import android.app.Activity; import android.content.OperationApplicationException; import android.os.Bundle; import android.widget.EditText;  public class ChatHub extends Activity {      private final static String HUB_URL="http://192.168.1.200:82/signalr/hubs";   @Override   protected void onCreate(Bundle savedInstanceState) {     // TODO Auto-generated method stub     super.onCreate(savedInstanceState);     setContentView(R.layout.chat_hub);     beginConnect();   }   /**   * hub鏈接   */   private HubConnection conn=new HubConnection(HUB_URL, this, new LongPollingTransport()) {     @Override     public void OnError(Exception exception) {     }     @Override     public void OnMessage(String message) {     }     @Override     public void OnStateChanged(StateBase oldState, StateBase newState) {     }   };   /**   * hub代理 panderman 2013-10-25   */   private IHubProxy hub = null;   /**   * 開啟推送服務 panderman 2013-10-25   */   private void beginConnect(){     try {       hub=conn.CreateHubProxy("ChatHub");     } catch (OperationApplicationException e) {       e.printStackTrace();     }     hub.On("addNewMessageToPage", new HubOnDataCallback()     {       @Override       public void OnReceived(JSONArray args) {         EditText chatText=(EditText)findViewById(R.id.chat_text);         //chatText.setText(args.toString());         for(int i=0; i<args.length(); i++)         {           chatText.append(args.opt(i).toString());         }       }     });     conn.Start();   } }