在Android中连接2个模拟器实例
我想在2模拟器中创build一个服务器和一个客户端来写入和读取数据。 我为服务器编写代码：
public class ServerActivity extends Activity { /** Called when the activity is first created. */ private ServerSocket serverSocket = null; private TextView tv; public static final int SERVERPORT = 4444; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); tv= (TextView) findViewById(R.id.myTextView); try { Connect(); } catch (IOException e) { // TODO Auto-generated catch block tv.setText("Not connected"); e.printStackTrace(); } } public void Connect() throws IOException { serverSocket = new ServerSocket(); serverSocket.bind(new InetSocketAddress("10.0.2.15", 4444)); while(true) { Socket socket = serverSocket.accept(); tv.setText("Connected..."); } } 和客户端的代码
public class ClientActivity extends Activity { /** Called when the activity is first created. */ private Button bt; private TextView tv; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bt = (Button) findViewById(R.id.myButton); tv = (TextView) findViewById(R.id.myTextView); bt.setOnClickListener(new OnClickListener() { public void onClick(View v) { // TODO Auto-generated method stub try { Socket socket = new Socket("10.0.2.2", 4445); } catch (UnknownHostException e) { // TODO Auto-generated catch block tv.setText("Error1"); e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block tv.setText("Error2"); e.printStackTrace(); } } }); } }
我build立了一个redirect：
telnet localhost 5554 redir add tcp:4445:4444
但它不是连接….请帮助我。 我很感激。
过了一段时间，我成功了。 我在服务器或客户端都没有提及10.0.2.15。 我以不同的方式打开了服务器套接字，并在不同的线程中处理了通信。 我运行仿真器5554上的服务器和5556上的客户端。
我的服务器代码，6000听
public class SocketServer extends Activity { ServerSocket ss = null; String mClientMsg = ""; Thread myCommsThread = null; protected static final int MSG_ID = 0x1337; public static final int SERVERPORT = 6000; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TextView tv = (TextView) findViewById(R.id.TextView01); tv.setText("Nothing from client yet"); this.myCommsThread = new Thread(new CommsThread()); this.myCommsThread.start(); } @Override protected void onStop() { super.onStop(); try { // make sure you close the socket upon exiting ss.close(); } catch (IOException e) { e.printStackTrace(); } } Handler myUpdateHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case MSG_ID: TextView tv = (TextView) findViewById(R.id.TextView01); tv.setText(mClientMsg); break; default: break; } super.handleMessage(msg); } }; class CommsThread implements Runnable { public void run() { Socket s = null; try { ss = new ServerSocket(SERVERPORT ); } catch (IOException e) { e.printStackTrace(); } while (!Thread.currentThread().isInterrupted()) { Message m = new Message(); m.what = MSG_ID; try { if (s == null) s = ss.accept(); BufferedReader input = new BufferedReader( new InputStreamReader(s.getInputStream())); String st = null; st = input.readLine(); mClientMsg = st; myUpdateHandler.sendMessage(m); } catch (IOException e) { e.printStackTrace(); } } } } }
我redirect端口类似于你
telnet localhost 5554 redir add tcp:5000:6000
我的客户端代码在端口5000上build立连接：
public class SocketClient extends Activity { private Button bt; private TextView tv; private Socket socket; private String serverIpAddress = "10.0.2.2"; // AND THAT'S MY DEV'T MACHINE WHERE PACKETS TO // PORT 5000 GET REDIRECTED TO THE SERVER EMULATOR'S // PORT 6000 private static final int REDIRECTED_SERVERPORT = 5000; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); bt = (Button) findViewById(R.id.myButton); tv = (TextView) findViewById(R.id.myTextView); try { InetAddress serverAddr = InetAddress.getByName(serverIpAddress); socket = new Socket(serverAddr, REDIRECTED_SERVERPORT); } catch (UnknownHostException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } bt.setOnClickListener(new OnClickListener() { public void onClick(View v) { try { EditText et = (EditText) findViewById(R.id.EditText01); String str = et.getText().toString(); PrintWriter out = new PrintWriter(new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())), true); out.println(str); Log.d("Client", "Client sent message"); } catch (UnknownHostException e) { tv.setText("Error1"); e.printStackTrace(); } catch (IOException e) { tv.setText("Error2"); e.printStackTrace(); } catch (Exception e) { tv.setText("Error3"); e.printStackTrace(); } } }); } }
服务器有一个TextView来接收消息，客户端有一个EditText来组成消息，还有一个button来发送消息。
它工作很好
您只需要添加两个步骤：1）在AndroidManifest.xml中的应用程序标签外部添加INTERNET权限标签
2）由于UI线程的networking限制，不能使用android> 3
