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Hay Abadi
2,625 Pointssending Messages from service to Activity
hey, again i stock on the last challege of the last task, plz help me to solve this.
the mission : "Handle the Message in GeolocationService, and use the 'replyTo' property to send a new Message back to MainActivity with the latitude in 'arg1' and the longitude in 'arg2'. Then call setCoordinates(int lat, int long) from within MainActivity to update the coordinates."
my MainActivity:
public class MainActivity extends Activity {
Boolean isBound = false;
Messenger mServiceMessenger;
Messenger mMainActivityMessenger = new Messenger(new ActivityHandler());
ServiceConnection mServiceConnection = new ServiceConnection() {
@Override
public void onServiceConnected(ComponentName name, IBinder binder) {
isBound = true;
mServiceMessenger = new Messenger(binder);
if (mServiceMessenger != null) {
Message msg = Message.obtain();
msg.replyTo = mMainActivityMessenger;
mServiceMessenger.send(msg);
}
}
@Override
public void onServiceDisconnected(ComponentName name) {
isBound = false;
}
};
public class ActivityHandler extends Handler{
@Override
public void handleMessage(Message msg){
}
}
}
my GeolocationService:
public class GeolocationService extends Service {
int mLatitude;
int mLongitude;
Messenger mMessenger = new Messenger(new LocationHandler());
@Override
public IBinder onBind(Intent intent) {
return mMessenger.getBinder();
}
class LocationHandler extends Handler {
@Override
public void handleMessage(Message msg) {
mLatitude = getLatitude();
mLongitude = getLongitude();
msg.arg1 = mLatitude ;
msg.arg2 = mLongitude;
msg.replyTo.send(msg);
}
}
}
1 Answer
Kourosh Raeen
23,733 PointsYou're just missing the last step which is to call setCoordinates() from within the handleMessage() method of the ActivityHandler inner class:
public class ActivityHandler extends Handler{
@Override
public void handleMessage(Message msg){
setCoordinates(msg.arg1, msg.arg2);
}
}