//Service class
public class WSDataParsing extends Service {
@Override
public IBinder onBind(Intent intent) {
return null;
}

public parsePhotosData(...){
}

public parseOtherData(...){
}
.
.
.

}

//Activity Class
public class MyFirstActivity extends Activity {
@Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                if(intent.getAction().equals(MyService.CUSTOM_INTENT)) {
                    prgBar.setProgress(intent.getIntExtra("progress", 0));
                }
            }
        };
}
}
//My second activity
public class MySecondActivity extends Activity {
@Override
      public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_second);
    final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                if(intent.getAction().equals(MyService.CUSTOM_INTENT)) {
                    prgBar.setProgress(intent.getIntExtra("progress", 0));
                }
            }
        };
}