Java tutorial
/*** Copyright (c) 2017 CommonsWare, LLC Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. Covered in detail in the book _The Busy Coder's Guide to Android Development_ https://commonsware.com/Android */ package com.commonsware.android.location.background; import android.app.Notification; import android.app.Service; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Build; import android.os.Bundle; import android.os.IBinder; import android.preference.PreferenceManager; import android.support.v4.app.NotificationCompat; import com.elvishew.xlog.XLog; public class LocationPollerService extends Service implements LocationListener { static int NOTIFY_ID = 1337; private static final String PREF_DELAY = "delay"; private static final String PREF_FOREGROUND = "foreground"; private LocationManager mgr; private SharedPreferences prefs; static Notification buildNotification(Context ctxt) { NotificationCompat.Builder b = new NotificationCompat.Builder(ctxt).setOngoing(true) .setContentTitle(ctxt.getString(R.string.notif_title)) .setContentText(ctxt.getString(R.string.notif_text)) .setSmallIcon(android.R.drawable.stat_sys_warning); return (b.build()); } @SuppressWarnings("MissingPermission") @Override public void onCreate() { super.onCreate(); prefs = PreferenceManager.getDefaultSharedPreferences(this); mgr = (LocationManager) getSystemService(LOCATION_SERVICE); String delay = prefs.getString(PREF_DELAY, "60000"); mgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, Integer.parseInt(delay), 0, this); if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.N_MR1 && prefs.getBoolean(PREF_FOREGROUND, false)) { startForeground(NOTIFY_ID, buildNotification(this)); } } @Override public void onDestroy() { super.onDestroy(); } @Override public IBinder onBind(Intent intent) { throw new UnsupportedOperationException("Wait, wut?"); } @Override public void onLocationChanged(Location location) { XLog.d("Location: %f/%f", location.getLatitude(), location.getLongitude()); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // unused } @Override public void onProviderEnabled(String provider) { // unused } @Override public void onProviderDisabled(String provider) { // unused } }