Android 中的網路功能

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遠程呼叫 (Remote Procedure Calls — RPC)

Android 中所提供的遠程呼叫，是建構在 Java 的 AIDL 機制上的，以下是 AIDL 遠程呼叫的示意圖。

圖一、AIDL 遠程呼叫的示意圖

http://stackoverflow.com/questions/2374080/android-client-server-app-bad-socket-exception

private static void startContextListener(){
 new Thread(){
  public void run(){
   try{
    while(contextsocket != null && !contextsocket.isClosed() && inContext.readObject() != null){
     kontext = (Kontext) inContext.readObject();
    }
   }
   catch(Exception e){
    Log.e(TAG, "startContextListener(): " + e.toString());
   }
  }
 }.start();
}

http://www.anddev.org/socket_programming-t325-s30.html

client in android 
package android.test; 

import java.io.BufferedWriter; 
import java.io.IOException; 
import java.io.OutputStreamWriter; 
import java.io.PrintWriter; 
import java.net.InetAddress; 
import java.net.Socket; 
import java.net.UnknownHostException; 

import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 

public class ClientTest extends Activity { 
/** Called when the activity is first created. */ 
@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
connectSocket(); 
} 

private void connectSocket() { 
// TODO Auto-generated method stub 
try { 
InetAddress serverAddr = InetAddress.getByName("10.66.3.44");//10.66.3.44 is my pc' IP 
Log.d("TCP", "C: Connecting..."); 
Socket socket = new Socket(serverAddr, 8221); 
String message = "Hello from Client android emulator"; 
try { 
Log.d("TCP", "C: Sending: '" + message + "'"); 
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true); 

out.println(message); 
Log.d("TCP", "C: Sent."); 
Log.d("TCP", "C: Done."); 

} catch(Exception e) { 
Log.e("TCP", "S: Error", e); 
} finally { 
socket.close(); 
} 

} catch (UnknownHostException e) { 
// TODO Auto-generated catch block 
Log.e("TCP", "C: UnknownHostException", e); 
e.printStackTrace(); 
} catch (IOException e) { 
// TODO Auto-generated catch block 
Log.e("TCP", "C: IOException", e); 
e.printStackTrace(); 
} 

} 
} 

server in pc 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.net.ServerSocket; 
import java.net.Socket; 

public class TCPDesktopServer implements Runnable{ 

/** 
* @param args 
*/ 
public static void main(String[] args) { 
// TODO Auto-generated method stub 
new Thread(new TCPDesktopServer()).start(); 
} 

public void run() { 
// TODO Auto-generated method stub 
try { 
System.out.println("S: Connecting..."); 
ServerSocket serverSocket = new ServerSocket(8221); 
while (true) { 
Socket client = serverSocket.accept(); 
System.out.println("S: Receiving..."); 

try { 

BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream())); 
String str = in.readLine(); 
System.out.println("S: Received: '" + str + "'"); 

} catch(Exception e) { 
System.out.println("S: Error"); 
e.printStackTrace(); 

} finally { 
client.close(); 
System.out.println("S: Done."); 
} 
} 

} catch (IOException e) { 
// TODO Auto-generated catch block 
System.out.println("S: Error"); 
e.printStackTrace(); 
} 
} 

}
zhufan
Junior Developer

Posts: 13
Joined: Wed Nov 26, 2008 3:18 am

參考文獻

http://developer.android.com/guide/topics/fundamentals.html

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page revision: 4, last edited: 22 Dec 2010 02:00

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遠程呼叫 (Remote Procedure Calls — RPC)

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