Java tutorial
package com.licenta.android.licenseapp.location; import android.Manifest; import android.app.Service; import android.content.Intent; import android.content.SharedPreferences; import android.content.pm.PackageManager; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.os.Bundle; import android.os.IBinder; import android.preference.PreferenceManager; import android.support.annotation.Nullable; import android.support.v4.content.ContextCompat; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.api.GoogleApiClient; import com.google.android.gms.location.LocationListener; import com.google.android.gms.location.LocationRequest; import com.google.android.gms.location.LocationServices; import com.licenta.android.licenseapp.model.LocationPoint; import com.licenta.android.licenseapp.util.Constants; import java.io.IOException; import java.util.Date; import java.util.List; import java.util.Locale; import io.realm.Realm; /** * Created by Oanette on 25.02.2016. */ public class LocationService extends Service implements LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener { private Realm mRealm; private GoogleApiClient mGoogleApiClient; private LocationRequest mLocationRequest; @Override public void onCreate() { super.onCreate(); mRealm = Realm.getDefaultInstance(); // Create an instance of GoogleAPIClient. if (mGoogleApiClient == null) { mGoogleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(this) .addOnConnectionFailedListener(this).addApi(LocationServices.API).build(); } // Create the LocationRequest object mLocationRequest = LocationRequest.create().setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY) .setInterval(5 * 60 * 1000).setFastestInterval(1 * 60 * 1000); } @Override public int onStartCommand(Intent intent, int flags, int startId) { mGoogleApiClient.connect(); return super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this); mGoogleApiClient.disconnect(); mRealm.close(); super.onDestroy(); } @Nullable @Override public IBinder onBind(Intent intent) { return null; } @Override public void onLocationChanged(Location location) { saveLocationToDB(location); } private void saveLocationToDB(Location location) { LocationPoint locationPoint = new LocationPoint(new Date(), location.getLatitude(), location.getLongitude()); mRealm.beginTransaction(); mRealm.copyToRealm(locationPoint); mRealm.commitTransaction(); saveLastKnownLocation(location); } private void saveLastKnownLocation(Location location) { Geocoder geocoder = new Geocoder(this, Locale.getDefault()); List<Address> addresses = null; try { addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.edit().putString(Constants.PREF_KEY_LAST_KNOWN_ADDRESS, addresses.get(0).getAddressLine(0)) .apply(); } catch (IOException | IllegalArgumentException e) { e.printStackTrace(); } } @Override public void onConnected(@Nullable Bundle bundle) { int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION); if (permissionCheck == PackageManager.PERMISSION_GRANTED) { LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this); Location lastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient); saveLocationToDB(lastLocation); } } @Override public void onConnectionSuspended(int i) { } @Override public void onConnectionFailed(ConnectionResult connectionResult) { } }