Question

I have a problem in the socket of the following code which made the program when I run it on AVD to stopped working (Unfortunately your -app- has stopped), I use Android 4.0 platform on Windows 7 ..
I tried to move the socket section to the button click, so when I click on the button the program stopped working, so here in the socket definition make the error. (Socket socket;)

public class ServerClient extends Activity {
// declaration of button, textView
private Button bt;
   private TextView tv;
  //port number
   private static final int REDIRECTED_SERVERPORT = 5000;
  //ip address
   private String serverIpAddress = "10.0.2.2";
   @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);

         // on click on the button the socket will be created
      bt.setOnClickListener(new OnClickListener() {

           Socket socket; //this line cause the app to stop working

         public void onClick(View v) {

          try {
             InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
             socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);

          } catch (UnknownHostException e1) {
             e1.printStackTrace();
          } catch (IOException e1) {
             e1.printStackTrace();
          }
            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();
            }
         }
      });
   }
}

Answer 1

Hello I had the same problem (Windows 7, Android 4.03). I have solved the problem using android 2.33 (API level 10) and emulator with android 2.33 kernel.