I am new Android coder and I have problem with requesting updates for my localization.
I working with tutorials from http://developer.android.com/training/location/receive-location-updates.html .
My application can handle exceptions, getting latitude and longitute properly, and geocoder can handle displaying the adress. But I ask for location only once - or when location changes. I would like to do time intervals. For now I started implementing code from the tutorials and it looks like that:
public class MainActivity extends Activity implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener,
LocationListener {
private static final int MILLISECONDS_PER_SECOND = 1000;
public static final int UPDATE_INTERVAL_IN_SECONDS = 5;
private static final long UPDATE_INTERVAL =
MILLISECONDS_PER_SECOND * UPDATE_INTERVAL_IN_SECONDS;
private static final int FASTEST_INTERVAL_IN_SECONDS = 1;
private static final long FASTEST_INTERVAL =
MILLISECONDS_PER_SECOND * FASTEST_INTERVAL_IN_SECONDS;
private TextView tvStatus;
private TextView tvLatitude;
private TextView tvLongitude;
LocationRequest mLocationRequest;
LocationClient mLocationClient;
Location mCurrentLocation;
boolean bNetworkEnabled;
boolean bGPSEnabled;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tvStatus = (TextView)findViewById(R.id.tvStatus);
tvLatitude = (TextView)findViewById(R.id.tvLatitude);
tvLongitude = (TextView)findViewById(R.id.tvLongitude);
mLocationRequest = LocationRequest.create();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationClient = new LocationClient(this, this, this);
checkProviders();
}
So there are already intervals implemented and location request. But in the link I gave before there is a comment that I should use somewhere requestLocationUpdates()
(probably onCreate()
, onStart()
and removal of request on onStop()
), but I have problem with it. So, Eclipse shows me 3 methods:
requestLocationUpdates(LocationRequest request, LocationListener listener)
requestLocationUpdates(LocationRequest request, PendingIntent CallbackIntent)
requestLocationUpdates(LocationRequest request, LocationListener listener, Looper looper)
So the first one I think is most right in this place. What should I place in LocationListener
slot? I ask for help with little explanation how it works.
You are implementing LocationListener in your activity MainActivity. The call for concurrent location updates will therefor be like this:
mLocationClient.requestLocationUpdates(mLocationRequest, this);
Be sure that the LocationListener you're implementing is from the google api, that is import this:
import com.google.android.gms.location.LocationListener;
and not this:
import android.location.LocationListener;
and it should work just fine.
It's also important that the LocationClient really is connected before you do this. I suggest you don't call it in the onCreate or onStart methods, but in onResume. It is all explained quite well in the tutorial for Google Location Api: https://developer.android.com/training/location/index.html