Android Open Source - wireless-barcode-scanner Server Service

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License

The source code is released under:

GNU General Public License

Java Source Code

package de.zwiebelchen.wirelessbarcodescanner;
/*  w w  w . j  a  va 2s . co m*/
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Vector;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class ServerService extends Service {

  private ServerSocket server;
  private Vector<Socket> clients;
  private Thread t;
  private boolean isRunning = true;
  private int port = 1234;

  private final IBinder mBinder = new LocalBinder();

  public class LocalBinder extends Binder {
    ServerService getService() {
      return ServerService.this;
    }
  }

  @Override
  public IBinder onBind(Intent intent) {
    return mBinder;
  }

  private void startServer() {
    t = new Thread() {
      @Override
      public void run() {
        try {
          server = new ServerSocket(port);
          isRunning = true;
          Log.i("ServerIP", server.getInetAddress().toString());
          clients = new Vector<Socket>();
          Socket s;
          while ((s = server.accept()) != null && isRunning) {
            clients.add(s);
          }
        } catch (IOException e) {
          if (!e.getMessage().equals("Socket closed")) {
            Log.e("BarcodeTyper.ServerService", "Error in Thread !", e);
          }
        }
      }
    };
    t.start();
  }
  
  private void stopServer() {
    isRunning = false;
    
    if (t != null) {
      if (t.isAlive()) {
        if (!clients.isEmpty()) {
          for (Socket client : clients) {
            try {
              client.close();
            } catch (Exception e) {
              Log.e("Writing failed", e.getMessage());
            }
          }
          clients = null;
        }
        if (!server.isClosed()) {
          try {
            server.close();
          }
          catch (Exception e) {
            Log.e("Writing failed", e.getMessage());
          }
        }
        t = null;
        server = null;
      }
      
    }
  }
  
  @Override
  public void onCreate() {
    super.onCreate();
    startServer();
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    
    stopServer();
  }
  
  public void setPort(int port) {
    
    this.port = port;
    
    if (isRunning) {
      stopServer();
    }
    
    startServer();
  }
  
  public int getPort() {
    return port;
  }
  
  public void sendString(String message) {
    if (!clients.isEmpty()) {
      for (Socket client : clients) {
        try {
          PrintWriter pw = new PrintWriter(
              client.getOutputStream());
          pw.write(message);
          pw.write("\n");
          pw.flush();
        } catch (Exception e) {
          Log.e("Writing failed", e.getMessage());
        }
      }
    }
  }
}

Java Source Code List

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