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 trialHay 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);
}
}