In Android ,how to receive GPS location continuously?

Question

Issue in onLocationChanged() function of location listener of android.location.LocationListener.

In Below code after requesting requestLocationUpdates of LocationManager, the onLocationChanged is called in uneven intervals, i.e i have set period at 1 second but i don't receive the location change after every second.

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;

@SuppressWarnings("MissingPermission")
public class SimplePositionProvider extends PositionProvider implements LocationListener {

public SimplePositionProvider(Context context, PositionListener listener) {
super(context, listener);

Log.i("SimplePositionProvider", "start");
if (!type.equals(LocationManager.NETWORK_PROVIDER)) {
type = LocationManager.GPS_PROVIDER;
}

}

public void startUpdates() {
Log.i("startUpdates", "start");
try {
Log.i("requestLocationUpdates", "start");
Log.i("TYPE", type);
locationManager.requestLocationUpdates(type, period, 0, this);
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG, "error");
}
}

public void stopUpdates() {
Log.i("stopUpdates", "start");
locationManager.removeUpdates(this);
}

@Override
public void onLocationChanged(Location location) {
Log.i("onLocationChanged", "start");
updateLocation(location);
}

@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.i("onStatusChanged", "start");
}

@Override
public void onProviderEnabled(String provider) {
Log.i("onProviderEnabled", "start");
}

@Override
public void onProviderDisabled(String provider) {
Log.i("onProviderDisabled", "start");
}

}

Answer 1

According to the tutorial, you should use FusedLocationProviderClient to request location updates. If memory serves, that solution sends updates at the specified interval. You can get a FusedLocationProviderClient by calling LocationServices.getFusedLocationProviderClient(Context context).

You can set the request expiration duration in LocationRequest with setExpirationDuration, and then use something like this code when you start the updates to re-start after each expiry:

Handler handler = new Handler(Looper.myLooper());
handler.postDelayed(new Runnable() {
    @Override
    public void run() {
      if (expectingLocationUpdates) {
        restartLocationUpdates();
      }
    }
}, EXPIRATION_DURATION);