Get GPS Location instantly via Android app

Question

all. I am writing an android app about GPS locations.

I tried it on emulator and entered the latitude and longitude manually, and it worked fine. However, my problem

Answer 1

The getLastKnownLocation method does not trigger an onLocationChanged event. One way to refactor your code would be to move the logic that acts on a Location to a separate method and then call that method both after you call getLastKnownLocation, and from your onLocationChanged method.

Bear in mind that there is no guarantee that getLastKnownLocation will provide a meaningful Location, since you the device might have moved since the last location update.

Example code:

public void onCreate(Bundle savedInstanceState){
    ....
    String provider = LocationManager.GPS_PROVIDER;
    Location location = locationManager.getLastKnownLocation(provider);
    updateLocation(location);
}

public class MyLocationUpdater implements LocationListener{ //change location interface
    @Override
    public void onLocationChanged(Location location) {
        updateLocation(location);
    }
    ...
}

void updateLocation(Location location) {
    Double lat = location.getLatitude();
    Double lon = location.getLongitude();

    // the rest of the code from onLocationChanged
}