Android TCP 客户端实现

因为项目上需要实现一个TCP Client 端；在网上找好多例子基本上都是阻塞方式完成；

我的实现例子：由Activity 及sever 来实现，在sever 创建一个线程来监听接受数据。收到数据，通过广播发送给Activity;

服务端我没有去实现，你可以下载TCP Socket 调试工具v2.2；创建个9005端口；客户端：访问的IP为10.0.2.2

 

AnetTest.java

1   /** 
2    * Copyright 2010 archfree 
3    *   
4    */ 
5   package com.archfree.demo; 
6   
7   import android.app.Activity; 
8   import android.content.BroadcastReceiver; 
9   import android.content.ComponentName; 
10  import android.content.Context; 
11  import android.content.Intent; 
12  import android.content.IntentFilter; 
13  import android.content.ServiceConnection; 
14  
15  import android.os.Bundle; 
16  import android.os.IBinder; 
17  import android.util.Log; 
18  import android.view.View; 
19  import android.view.View.OnClickListener; 
20  import android.widget.Button; 
21  import android.widget.EditText; 
22  import android.widget.TextView; 
23  
24  public class AnetTest extends Activity { 
25  
26      /** 
27       * 通过ServiceConnection的内部类实现来连接Service和Activity 
28       *  
29       */ 
30      public static final String TAG = "AnetTest"; 
31      private static final boolean DEBUG = true;// false 
32      private String msg = ""; 
33      private UpdateReceiver mReceiver; 
34      private Context mContext; 
35      private ReceiveMessage mReceiveMessage; 
36  
37      // 实现一个 BroadcastReceiver，用于接收指定的 Broadcast 
38      public class UpdateReceiver extends BroadcastReceiver { 
39  
40          @Override 
41          public void onReceive(Context context, Intent intent) { 
42              if (DEBUG) 
43                  Log.d(TAG, "onReceive: " + intent); 
44              msg = intent.getStringExtra("msg"); 
45              System.out.println("recv:" + msg); 
46              // System.out.println(); 
47              ((EditText) findViewById(R.id.tv_recv)).append(msg + "/n"); 
48  
49          } 
50  
51      } 
52  
53      private ServiceConnection serviceConnection = new ServiceConnection() { 
54  
55          @Override 
56          public void onServiceConnected(ComponentName name, IBinder service) { 
57  
58              mReceiveMessage = ((ReceiveMessage.LocalBinder) service) 
59                      .getService(); 
60              if (DEBUG) 
61                  Log.d(TAG, "on serivce connected"); 
62  
63          } 
64  
65          @Override 
66          public void onServiceDisconnected(ComponentName name) { 
67              mReceiveMessage = null; 
68          } 
69      }; 
70  
71      /** Called when the activity is first created. */ 
72      @Override 
73      public void onCreate(Bundle savedInstanceState) { 
74          super.onCreate(savedInstanceState); 
75          setContentView(R.layout.main); 
76  
77          // 实例化自定义的 BroadcastReceiver 
78          mReceiver = new UpdateReceiver(); 
79          IntentFilter filter = new IntentFilter(); 
80          // 为 BroadcastReceiver 指定 action ，使之用于接收同 action 的广播 
81          filter.addAction("com.archfree.demo.msg"); 
82  
83          // 以编程方式注册 BroadcastReceiver 。配置方式注册 BroadcastReceiver 的例子见 
84          // AndroidManifest.xml 文件 
85          // 一般在 OnStart 时注册，在 OnStop 时取消注册 
86          this.registerReceiver(mReceiver, filter); 
87  
88          mContext = AnetTest.this; 
89          /** 
90           * Button bn_conn bn_send bn_bind bn_unbind 
91           */ 
92  
93          // Button bn_conn = (Button) findViewById(R.id.bn_conn); 
94          Button bn_send = (Button) findViewById(R.id.bn_send); 
95          Button bn_bind = (Button) findViewById(R.id.bn_bind); 
96          Button bn_unbind = (Button) findViewById(R.id.bn_unbind); 
97          EditText tv_recv = (EditText) findViewById(R.id.tv_recv); 
98          /** 
99           * EditText et_send 
100          */ 
101 
102         EditText et_send = (EditText) findViewById(R.id.et_send); 
103 
104         /** 
105          * bn_send on click 
106          */ 
107 
108         bn_send.setOnClickListener(new OnClickListener() { 
109 
110             public void onClick(View arg0) { 
111                 // TODO 
112                 ((EditText) findViewById(R.id.tv_recv)).clearComposingText(); 
113 
114                 mReceiveMessage 
115                        .SendMessageToServer("0001058512250000190010900005300010001354758032278512     460029807503542             0613408000011       "); 
116             } 
117         }); 
118 
119         /** 
120          * bn_bind on click 
121          */ 
122         bn_bind.setOnClickListener(new OnClickListener() { 
123 
124             public void onClick(View arg0) { 
125                 // TODO 
126                 Intent i = new Intent(); 
127                 Bundle bundle = new Bundle(); 
128                 bundle.putString("chatmessage", 
129                         ((EditText) findViewById(R.id.et_send)).getText() 
130                                 .toString()); 
131                 i.putExtras(bundle); 
132                 System.out.println(" send  onclick"); 
133                 bindService(new Intent("com.archfree.demo.ReceiveMessage"), 
134                         serviceConnection, BIND_AUTO_CREATE); 
135 
136             } 
137         }); 
138         /** 
139          * bn_unbind on click 
140          */ 
141         bn_unbind.setOnClickListener(new OnClickListener() { 
142 
143             public void onClick(View arg0) { 
144                 // TODO 
145                 mContext.unbindService(serviceConnection); 
146 
147             } 
148         }); 
149         /** 
150          * Activity和本地服务交互,需要使用bind和unbind方法 
151          * */ 
152 
153     } 
154 
155     @Override 
156     protected void onDestroy() { 
157         // TODO Auto-generated method stub 
158         super.onDestroy(); 
159         unbindService(serviceConnection); 
160         unregisterReceiver(mReceiver); 
161     } 
162 
163 }

=============================================================================================

ReceiveMessage.java 参考网络资源，修改；

1   package com.archfree.demo; 
2   
3   import java.io.IOException; 
4   import java.net.InetSocketAddress; 
5   import java.nio.ByteBuffer; 
6   import java.nio.CharBuffer; 
7   import java.nio.channels.SocketChannel; 
8   import java.nio.charset.CharacterCodingException; 
9   import java.nio.charset.Charset; 
10  import java.nio.charset.CharsetDecoder; 
11  import android.app.Notification; 
12  import android.app.NotificationManager; 
13  import android.app.PendingIntent; 
14  import android.app.Service; 
15  import android.content.Context; 
16  import android.content.Intent; 
17  import android.os.Binder; 
18  import android.os.IBinder; 
19  
20  public class ReceiveMessage extends Service { 
21  
22      // @Override 
23      // public int onStartCommand(Intent intent, int flags, int startId) { 
24      // // TODO Auto-generated method stub 
25      // return super.onStartCommand(intent, flags, startId); 
26      // } 
27  
28      private SocketChannel client = null; 
29      private InetSocketAddress isa = null; 
30      private String message = ""; 
31  
32      public void onCreate() { 
33          System.out.println("----- onCreate---------"); 
34          super.onCreate(); 
35  
36          ConnectToServer(); 
37          StartServerListener(); 
38  
39      } 
40  
41      public void onDestroy() { 
42          super.onDestroy(); 
43          DisConnectToServer(); 
44      } 
45  
46      public void onStart(Intent intent, int startId) { 
47          System.out.println("----- onStart---------"); 
48          super.onStart(intent, startId); 
49      } 
50  
51      /* 
52       * IBinder方法 , LocalBinder 类,mBinder接口这三项用于 
53       * Activity进行Service的绑定，点击发送消息按钮之后触发绑定 并通过Intent将Activity中的EditText的值 
54       * 传送到Service中向服务器发送 
55       */ 
56      public IBinder onBind(Intent intent) { 
57          System.out.println("----- onBind---------"); 
58  
59  //        message = intent.getStringExtra("chatmessage"); 
60  //        if (message.length() > 0) { 
61  //            SendMessageToServer(message); 
62  //        } 
63          return mBinder; 
64      } 
65  
66      public class LocalBinder extends Binder { 
67          ReceiveMessage getService() { 
68              return ReceiveMessage.this; 
69          } 
70      } 
71  
72      private final IBinder mBinder = new LocalBinder(); 
73  
74      // 用于链接服务器端 
75      public void ConnectToServer() { 
76          try { 
77  
78              client = SocketChannel.open(); 
79              //isa = new InetSocketAddress("10.0.2.2", 9005); 
80              isa = new InetSocketAddress("211.141.230.246", 6666); 
81              client.connect(isa); 
82              client.configureBlocking(false); 
83  
84          } catch (IOException e) { 
85              // TODO Auto-generated catch block 
86              e.printStackTrace(); 
87  
88          } 
89      } 
90  
91      // 断开与服务器端的链接 
92      public void DisConnectToServer() { 
93          try { 
94              client.close(); 
95          } catch (IOException e) { 
96              // TODO Auto-generated catch block 
97              e.printStackTrace(); 
98          } 
99      } 
100 
101     // 启动服务器端的监听线程，从Server端接收消息 
102     public void StartServerListener() { 
103         ServerListener a = new ServerListener(); 
104         a.start(); 
105     } 
106 
107     // 向Server端发送消息 
108     public void SendMessageToServer(String msg) { 
109 
110         System.out.println("Send:" + msg); 
111 
112         try { 
113             ByteBuffer bytebuf = ByteBuffer.allocate(1024); 
114             bytebuf = ByteBuffer.wrap(msg.getBytes("UTF-8")); 
115             client.write(bytebuf); 
116             bytebuf.flip(); 
117         } catch (IOException e) { 
118             // TODO Auto-generated catch block 
119             e.printStackTrace(); 
120             System.out.println(" SendMessageToServer IOException==="); 
121 
122         } 
123     } 
124 
125     private void shownotification(String tab) { 
126         System.out.println("shownotification=====" + tab); 
127         NotificationManager barmanager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
128         Notification msg = new Notification( 
129                 android.R.drawable.stat_notify_chat, "A Message Coming!", 
130                 System.currentTimeMillis()); 
131         PendingIntent contentIntent = PendingIntent.getActivity(this, 0, 
132                 new Intent(this, AnetTest.class), PendingIntent.FLAG_ONE_SHOT); 
133         msg.setLatestEventInfo(this, "Message", "Message:" + tab, contentIntent); 
134         barmanager.notify(0, msg); 
135     } 
136     // 发送广播信息 
137     private void sendMsg(String msg){ 
138         // 指定广播目标的 action （注：指定了此 action 的 receiver 会接收此广播） 
139         Intent intent = new Intent("com.archfree.demo.msg"); 
140         // 需要传递的参数 
141         intent.putExtra("msg", msg); 
142         // 发送广播 
143         this.sendBroadcast(intent); 
144     } 
145 
146     private class ServerListener extends Thread { 
147         //private    ByteBuffer buf = ByteBuffer.allocate(1024); 
148         public void run() { 
149 
150             try { 
151                 // 无线循环，监听服务器,如果有不为空的信息送达，则更新Activity的UI 
152                 while (true) { 
153                     ByteBuffer buf = ByteBuffer.allocate(1024); 
154                     //buf.clear(); 
155                     client.read(buf); 
156                     buf.flip(); 
157                     Charset charset = Charset.forName("UTF-8"); 
158                     CharsetDecoder decoder = charset.newDecoder(); 
159                     CharBuffer charBuffer; 
160                     charBuffer = decoder.decode(buf); 
161                     String result = charBuffer.toString(); 
162                     if (result.length() > 0) 
163                     {// recvData(result); 
164                         sendMsg(result); 
165                         //System.out.println("+++++="+result); 
166                     
167                         //shownotification(result); 
168                     } 
169                     
170 
171                     // System.out.println("++++++++++++++++++="+result); 
172                 } 
173             } catch (CharacterCodingException e) { 
174                 // TODO Auto-generated catch block 
175                 e.printStackTrace(); 
176             } catch (IOException e) { 
177                 // TODO Auto-generated catch block 
178                 e.printStackTrace(); 
179             } 
180         } 
181     } 
182 
183 }

=================================================================

AndroidManifest.xml

1  <?xml version="1.0" encoding="utf-8"?> 
2  <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
3      package="com.archfree.demo" android:versionCode="1" 
4      android:versionName="1.0"> 
5      <application android:icon="@drawable/icon" android:label="@string/app_name"> 
6          <activity android:name=".AnetTest" android:label="@string/app_name"> 
7              <intent-filter> 
8                  <action android:name="android.intent.action.MAIN" /> 
9                  <category android:name="android.intent.category.LAUNCHER" /> 
10             </intent-filter> 
11         </activity>