[android-developers] App talking to native ARM binary via sockets

Hi,

I'm trying to get an Android app to talk to a native Android binary service. Basically when I click a button, the app should send data to the service, and receive some data back as well. I've written the Android client app code, relevant portion below:

    Button.OnClickListener buttonSendOnClickListener = new Button.OnClickListener(){
      //@Override
      public void onClick(View arg0) {
        Socket socket = null;
        DataOutputStream dataOutputStream = null;
        DataInputStream dataInputStream = null;

        try {
          socket = new Socket("10.0.2.2", 8888);
          dataOutputStream = new DataOutputStream(socket.getOutputStream());
          dataInputStream = new DataInputStream(socket.getInputStream());
          dataOutputStream.writeUTF(textOut.getText().toString());
        } catch (UnknownHostException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        } catch (IOException e) {
          // TODO Auto-generated catch block
          e.printStackTrace();
        }
        finally{
          if (socket != null){
            try {
              socket.close();
            } catch (IOException e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
        }
        if (dataOutputStream != null){
          try {
            dataOutputStream.close();
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }
        if (dataInputStream != null){
         try {
            dataInputStream.close();
          } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
          }
        }
       }
    }};

When I run the app, it hangs and times out when I click the button. Turns out it hangs on the socket connection. Is this because I have the wrong address, or because there's no server listening to the same socket?

Also, are there any example code for a server I can cross compile for Android that will talk to the Android app using sockets?

Thanks!

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