Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Android Threads and Services Bound Services Binding to a Service

Posted by Luca Parlapiano
Luca Parlapiano
Courses Plus Student 954 Points

Bummer: Create a ServiceConnection field at the top of MainActivity.

I don't see the error. Please can i have help?

Thanks

MainActivity.java 
public class MainActivity extends Activity {
  int latitude;
  int longitude;

  private boolean mBound = false;

  private ServiceConnection connessioneServizio = new ServiceConnection() {
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
      mBound = true;
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
      mBound = false;
    }
  };

  @Override
  public void onCreate(Bundle savedInstanceState) {
    setContentView(R.layout.activity_main);



    Button updateLocationButton = (Button) findViewById(R.id.update_button);
    updateLocationButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v){
      }
    });
  }

  @Override
    public void onStart() {
        super.onStart();
        Intent intent = new Intent(this, GeolocationService.class);
        bindService(intent, connessioneServizio, Context.BIND_AUTO_CREATE);
    };

  @Override
    public void onStop() {
        super.onStop();
        if (mBound) {
            unbindService(connessioneServizio);
            mBound = false;
        }
    }
}
GeolocationService.java 
public class GeolocationService extends Service {

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

    //Client methods
    public int getLatitude() { return getLat(); }    
    public int getLongitude() { return getLng(); }
}

2 Answers

Cam Richardson
seal-mask
MOD
.a{fill-rule:evenodd;}techdegree
Cam Richardson
Front End Web Development Treehouse Moderator 16,895 Points
Cam Richardson
.a{fill-rule:evenodd;}techdegree
Cam Richardson
Front End Web Development Treehouse Moderator 16,895 Points

Hey there Luca!

It looks like your problem is that you defined the name of your ServiceConnection variable in Italian. While there is certainly nothing inherently wrong with that practice in real world terms, the challenge is very specifically looking for a ServiceConnection named serviceConnection.

In a similar vein, your Boolean is named mBound but the challenge is expecting to see isBound.

Hope that helps!

Gift Nyamapfene
Gift Nyamapfene
5,409 Points
Gift Nyamapfene
Gift Nyamapfene
5,409 Points

public class MainActivity extends Activity { int latitude; int longitude;

private boolean isBound = false;

private ServiceConnection serviceConnection = new ServiceConnection() { @Override public void onServiceConnected(ComponentName name, IBinder service) { isBound = true; }

@Override
public void onServiceDisconnected(ComponentName name) {
  isBound = false;
}

};

@Override public void onCreate(Bundle savedInstanceState) { setContentView(R.layout.activity_main);

Button updateLocationButton = (Button) findViewById(R.id.update_button);
updateLocationButton.setOnClickListener(new View.OnClickListener() {
  @Override
  public void onClick(View v){
  }
});

}

@Override public void onStart() { super.onStart(); Intent intent = new Intent(this, GeolocationService.class); bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE); };

@Override public void onStop() { super.onStop(); if (isBound) { unbindService(serviceConnection); isBound = false; } } }