Help Bluetooth app

[hantescu]

Hi!
I have some problems with my bluetooth app. I made the setup for a bluetooth server on a raspberry pi and i was able to send data to it with my app, but I don't know how to receive data from the server. The server works properly, I tried with the BlueTerm 2 app and I can receive data from it. Can someone help me to implement the receiver in my app?
My code below:

package com.example.bluetooth1;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.util.UUID;
import com.example.bluetooth1.R;
import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
  private static final String TAG = "bluetooth1";
  
  Button btnOn, btnOff;
  
  private BluetoothAdapter btAdapter = null;
  private BluetoothSocket btSocket = null;
  private OutputStream outStream = null;
  
  // SPP UUID service
  private static final UUID MY_UUID = UUID.fromString("94f39d29-7d6d-437d-973b-fba39e49d4ee");
  // MAC-address of Bluetooth module (you must edit this line)
  private static String address = "00:1A:7D:DA:71:14";
  
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btnOn = (Button) findViewById(R.id.btnOn);
    btnOff = (Button) findViewById(R.id.btnOff);
    
    btAdapter = BluetoothAdapter.getDefaultAdapter();
    checkBTState();
    btnOn.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        sendData("esti un prost");
        //Toast.makeText(getBaseContext(), "Turn on LED", Toast.LENGTH_SHORT).show();
      }
    });
    btnOff.setOnClickListener(new OnClickListener() {
      public void onClick(View v) {
        sendData("cel mai prost");
       // Toast.makeText(getBaseContext(), "Turn off LED", Toast.LENGTH_SHORT).show();
      }
    });
  }
 
  private BluetoothSocket createBluetoothSocket(BluetoothDevice device) throws IOException {
      if(Build.VERSION.SDK_INT >= 10){
          try {
              final Method  m = device.getClass().getMethod("createInsecureRfcommSocketToServiceRecord", new Class[] { UUID.class });
              return (BluetoothSocket) m.invoke(device, MY_UUID);
          } catch (Exception e) {
              Log.e(TAG, "Could not create Insecure RFComm Connection",e);
          }
      }
      return  device.createRfcommSocketToServiceRecord(MY_UUID);
  }
  
  @Override
  public void onResume() {
    super.onResume();

    // Set up a pointer to the remote node using it's address.
    BluetoothDevice device = btAdapter.getRemoteDevice(address);
    try {
        btSocket = createBluetoothSocket(device);
    } catch (IOException e1) {
        errorExit("Fatal Error", "In onResume() and socket create failed: " + e1.getMessage() + ".");
    }
   

    btAdapter.cancelDiscovery();
    try {
      btSocket.connect();
    } catch (IOException e) {
      try {
        btSocket.close();
      } catch (IOException e2) {
      }
    }

    try {
      outStream = btSocket.getOutputStream();
    } catch (IOException e) {
      errorExit("Fatal Error", "In onResume() and output stream creation failed:" + e.getMessage() + ".");
    }
  }

  
  private void checkBTState() {
    // Check for Bluetooth support and then check to make sure it is turned on
    // Emulator doesn't support Bluetooth and will return null
    if(btAdapter==null) {
      errorExit("Fatal Error", "Bluetooth not support");
    } else {
      if (btAdapter.isEnabled()) {
        Log.d(TAG, "...Bluetooth ON...");
      } else {
        //Prompt user to turn on Bluetooth
        Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enableBtIntent, 1);
      }
    }
  }
  private void errorExit(String title, String message){
    Toast.makeText(getBaseContext(), title + " - " + message, Toast.LENGTH_LONG).show();
    finish();
  }
  private void sendData(String message) {
    byte[] msgBuffer = message.getBytes();

    try {
      outStream.write(msgBuffer);
    } catch (IOException e) {
      String msg = "In onResume() and an exception occurred during write: " + e.getMessage();
      if (address.equals("00:00:00:00:00:00"))
        msg = msg + ".\n\nUpdate your server address from 00:00:00:00:00:00 to the correct address on line 35 in the java code";
          msg = msg +  ".\n\nCheck that the SPP UUID: " + MY_UUID.toString() + " exists on server.\n\n";
      
          errorExit("Fatal Error", msg);      
    }
  }
}