We Keep Coding

How can I get location in background every 10 minutes even if the app is not running?

I'm working on a small app that displays the history of my geolocation over the year. To achieve this, I'm getting the geolocation every 10 minutes in the background, even if the app is not running. For this, I've tried to make an AlarmManager that calls a Service (which gets the location using LocationManager) every 600000ms (10m). It didn't work at all so I've made my AlarmManager calls a BroadcastReceiver which then calls the Service. But this didn't work as well.
I'm new at Services, BroadcastReceivers and sheduled tasks... I've searched on Google how to make this work properly, how to make sheduled tasks, how to correctly setup an AlarmManager, how to get location every X minutes in background, etc. but I didn't find any useful tutorial or answers on StackOverflow.
So here I am. How could I achieve this?
Here's the code I currently use in my project:
MainActivity.java:
private void startAlarmTimerTask() {
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent alm = new Intent(this, LocationBroadcast.class);
PendingIntent pendInt = PendingIntent.getBroadcast(this, 0, alm, 0);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 600000, pendInt);
}
//Call startAlarmTimerTask(); in onCreate()
LocationBroadcast.java:
public class LocationBroadcast extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Fetching location...", Toast.LENGTH_LONG);
Intent serviceIntent = new Intent(context, LocationService.class);
context.startService(serviceIntent);
}
}
LocationService.java:
public class LocationService extends Service implements LocationListener {
private SharedPreferences dataly;
private LocationManager geolocation;
#Override
public void onCreate() {
geolocation = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
geolocation.requestLocationUpdates(LocationManager.GPS_PROVIDER, 500, 1, this);
}
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onLocationChanged(Location location) {
final double latitude = location.getLatitude();
final double longitude = location.getLongitude();
//Save latitude and longitude in SharedPreferences
//Stop location updates
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
}
}

How to stop properly FusedLocationProviderClient?

I use FusedLocationProviderClient within a Service.
I would like to "stop" it in a right way.
Is it good to use following code?
#Override
public void onDestroy() {
super.onDestroy();
// Stop Looper of FusedLocationProviderClient
if (locationClient != null) {
locationClient = null;
}
}
And the rest code
FusedLocationProviderClient locationClient;
protected void startLocationUpdates() {
// Create the location request to start receiving updates
mLocationRequest = new LocationRequest();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
// Create LocationSettingsRequest object using location request
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder();
builder.addLocationRequest(mLocationRequest);
LocationSettingsRequest locationSettingsRequest = builder.build();
// Check whether location settings are satisfied
// https://developers.google.com/android/reference/com/google/android/gms/location/SettingsClient
SettingsClient settingsClient = LocationServices.getSettingsClient(this);
settingsClient.checkLocationSettings(locationSettingsRequest);
// new Google API SDK v11 uses getFusedLocationProviderClient(this)
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
locationClient = getFusedLocationProviderClient(this);getFusedLocationProviderClient(this).requestLocationUpdates(mLocationRequest, new LocationCallback() {
#Override
public void onLocationResult(LocationResult locationResult) {
// do work here
onLocationChanged(locationResult.getLastLocation());
}
}, Looper.myLooper());
}

just call removeLocationUpdates in onDestroy
for requestLocationUpdates, it says:
This call will keep the Google Play services connection active, so make sure to call removeLocationUpdates(LocationCallback) when you no longer need it, otherwise you lose the benefits of the automatic connection management.

just change onDestroy(); to this:
#Override
protected void onDestroy() {
super.onDestroy();
if(locationclient!=null)
locationclient.disconnect();
}

LocationListner no longer listen for gps status change after upgrade to Android 7

After updated my app to support Android 7 the GPS listner no longer is invoked when the GPS on/off is triggerd. If I refresh my activity it works as expected on Android 6, but not in Android 7. Does anyone have any idea. I have added both my listner, and code releated to gps change in my activity.
I have if its difficult a theory to override the backpressed or activity resumed to recreate view, but havn't suceeded with that either .
GPSListner.java
public abstract class GPSListener implements LocationListener {
private Context context;
public GPSListener(Context context) {
this.context = context;
}
#Override
public void onProviderEnabled(String provider) {
onGPSOn();
}
#Override
public void onProviderDisabled(String provider) {
onGPSOff();
}
public abstract void onGPSOff();
public abstract void onGPSOn();
#Override
public void onLocationChanged(Location location) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
My class
gpsListener = new GPSListener(this) {
#Override
public void onGPSOff() {
gpsImg.setImageResource(R.drawable.notok);
}
#Override
public void onGPSOn() {
gpsImg.setImageResource(R.drawable.ok);
}
};
final LocationManager manager;
manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
final ImageView gpsImg = (ImageView) findViewById(R.id.gpsstatus);
if (manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
gpsImg.setImageResource(R.drawable.ok);
} else {
gpsImg.setImageResource(R.drawable.notok); //not ok
}
This last method opens the gps settings.
public View.OnClickListener onButtongpsClick = new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(gpsOptionsIntent);
}
};

Obtaining location is a bit tricky itself. Only GPS can have line-of-sight issues and would vary depending on device too, not just Android version. Over the years Android location services have matured and using up-to-date standard practices does result in higher consistency with respect to results.
By the way, LocationClient is deprecated. FusedLocationProviderApi does not use it anymore.
It works through a GoogleApiClient and this part makes the GooglePlayServices mandatory. You have options if this does not suit your app.
Making your app location aware suggests:
The Google Play services location APIs are preferred over the Android
framework location APIs (android.location) as a way of adding location
awareness to your app. If you are currently using the Android
framework location APIs, you are strongly encouraged to switch to the
Google Play services location APIs as soon as possible.
You can break it into parts to understand it better, like;
Building the GoogleApiClient
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this) //this = activity
.addApi(LocationServices.API)
.addConnectionCallbacks(this) //interfaces implemented
.addOnConnectionFailedListener(this)
.build();
}
Requesting location,
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
mLocationRequest, this);
Try the last known location, if that requirement works for you,
#Override
public void onConnected(Bundle bundle) {
Location mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
...}
onConnected() is the callback from GoogleApiClient...
So there is more to location than initialising a client and implementing the listener. I recommend you go through a few questions or android docs to ensure you implement what suits your requirement.
Also,
instead of
Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS); ,
use SettingsApi
can refer to Enabling location mode...
Some useful Q&As:
Comprehensive answer for obtaining location
Good to go through LocationRequest part here if you want to avoid reading in detail

final LocationManager manager;
manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Do i even have to comment on this one? Read it again and you will understand what is wrong with it.
Hint. Try:
final LocationManager manager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

You can used fused location api to get the location
Fused Location Api :
Fused Location Provider automatically decides best location from the available options for that it uses GPS and Network Provider, So if the device GPS is off we can still get the location from Network provider vice versa.
Why Fused Location Api ?
Consumption of power while fetching location.
It will give accurate
location based on user priority.
Piggyback which means you can get
location every time when other application hits for location for you
advantage is user not blame you for that you just getting those
location which other application request.
We don’t have to pick the
provider(GPS or network provider)
please refer code for following for getting location.
LocationService : We required these for getting continues location and these register as pending intent so whenever device got new location these service invoke.
public class LocationService extends IntentService {
private String TAG = this.getClass().getSimpleName();
public LocationService() {
super("Fused Location");
}
public LocationService(String name) {
super("Fused Location");
}
#Override
protected void onHandleIntent(Intent intent) {
Location location = intent.getParcelableExtra(LocationClient.KEY_LOCATION_CHANGED);
if(location !=null){
Log.i(TAG, "onHandleIntent " + location.getLatitude() + "," + location.getLongitude());
// write your code here.
}
}
}
MainActivity : which register callbacks for it which tell us whether we are connected or disconnected with api.
public class MainActivity extends Activity implements GooglePlayServicesClient.ConnectionCallbacks,GooglePlayServicesClient.OnConnectionFailedListener,LocationListener {
private String TAG = this.getClass().getSimpleName();
private LocationClient locationclient;
private LocationRequest locationrequest;
private Intent mIntentService;
private PendingIntent mPendingIntent;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mIntentService = new Intent(this,LocationService.class);
mPendingIntent = PendingIntent.getService(this, 1, mIntentService, 0);
int resp =GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if(resp == ConnectionResult.SUCCESS){
locationclient = new LocationClient(this,this,this);
locationclient.connect();
}
else{
Toast.makeText(this, "Google Play Service Error " + resp, Toast.LENGTH_LONG).show();
}
}
public void buttonClicked(View v){
if(v.getId() == R.id.btnLastLoc){
if(locationclient!=null && locationclient.isConnected()){
Location loc =locationclient.getLastLocation();
Log.i(TAG, "Last Known Location :" + loc.getLatitude() + "," + loc.getLongitude());
txtLastKnownLoc.setText(loc.getLatitude() + "," + loc.getLongitude());
}
}
if(v.getId() == R.id.btnStartRequest){
if(locationclient!=null && locationclient.isConnected()){
if(((Button)v).getText().equals("Start")){
locationrequest = LocationRequest.create();
locationrequest.setInterval(Long.parseLong(etLocationInterval.getText().toString()));
locationclient.requestLocationUpdates(locationrequest, this);
((Button) v).setText("Stop");
}
else{
locationclient.removeLocationUpdates(this);
((Button) v).setText("Start");
}
}
}
if(v.getId() == R.id.btnRequestLocationIntent){
if(((Button)v).getText().equals("Start")){
locationrequest = LocationRequest.create();
locationrequest.setInterval(100);
locationclient.requestLocationUpdates(locationrequest, mPendingIntent);
((Button) v).setText("Stop");
}
else{
locationclient.removeLocationUpdates(mPendingIntent);
((Button) v).setText("Start");
}
}
}
#Override
protected void onDestroy() {
super.onDestroy();
if(locationclient!=null)
locationclient.disconnect();
}
#Override
public void onConnected(Bundle connectionHint) {
Log.i(TAG, "onConnected");
txtConnectionStatus.setText("Connection Status : Connected");
}
#Override
public void onDisconnected() {
Log.i(TAG, "onDisconnected");
txtConnectionStatus.setText("Connection Status : Disconnected");
}
#Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "onConnectionFailed");
txtConnectionStatus.setText("Connection Status : Fail");
}
#Override
public void onLocationChanged(Location location) {
if(location!=null){
Log.i(TAG, "Location Request :" + location.getLatitude() + "," + location.getLongitude());
}
}
}
For more reference refer below link
https://github.com/riteshreddyr/fused-location-provider
https://github.com/kpbird/fused-location-provider-example
Hope these help you.

Getting the user's location in Android when the phone is locked

I am looking for a solution to get the user's location in a specific time-interval in Android API 17 (Android 4.2) and when the phone is locked.
I've already tried some different code, checked a lot tutorials and searched almost everywhere on the web. The solution might be there, but I think it's a combination of lack of experience with Android developing and interpreting the different right solutions and approaches.
At first I had some pretty basic code, which worked very well when the screen was turned on. Even in the background, the location got updated (as I could check via a Toast message with the longitude and latitude).
I used a Handler to do so:
public void locationRunnable() {
final Handler locationHandler = new Handler();
final int distanceDelay = 5000; // milliseconds
locationHandler.postDelayed(new Runnable(){
public void run() {
// code
mMap.clear();
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// ActivityCompat#requestPermissions
// here to request the missing permissions, and then overriding
// public void onRequestPermissionsResult(int requestCode, String[] permissions,
// int[] grantResults)
// to handle the case where the user grants the permission. See the documentation
// for ActivityCompat#requestPermissions for more details.
return;
}
mMap.setMyLocationEnabled(true);
mMap.setBuildingsEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(false);
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
myLocation = locationManager.getLastKnownLocation(provider);
if (myLocation != null) {
latitudeCurrentPosition = myLocation.getLatitude();
longitudeCurrentPosition = myLocation.getLongitude();
}
currentPattern = shortTest;
Notification.Builder notificationBuilderChecking = new Notification.Builder(this)
.setSmallIcon(R.mipmap.ic_launcher)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))
.setContentTitle("Test app")
.setAutoCancel(true)
.setOnlyAlertOnce(false)
.setContentText("Getting location!")
.setPriority(Notification.PRIORITY_MAX)
.setLights(0xffffffff, 200, 200)
.setVibrate(currentPattern);
Notification notification2 = notificationBuilderChecking.build();
NotificationManager notificationMngr2 = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationMngr2.notify(NOTIFICATION_ID, notification2);
locationHandler.postDelayed(this, distanceDelay);
}
}, distanceDelay);
}
It's just a snippet and the purpose is that in the background, when the screen is locked, this will loop every 10 seconds. And it does. Even when the phone is locked, but only for about 3 times. After 3 times the timer goes up and the phone vibrates less frequent (Doze feature in the way?).
Also, the phone does vibrate, but the location isn't updated. When I unlock the phone with the app in the foreground, the location is still at the place when I locked the phone. After a while (10 seconds) it updates. I use a marker on the map to check.
Again: it works when the phone is unlocked.
Now I'm trying to use a Service, a Service (Intent Service), or a Broadcast Receiver, and start a new Thread, but I don't know how and nothing is working.
Some of the last code I have contains a not functioning Broadcast Receiver and the most recent code contains a AlarmManager:
public void getLocation(Context context) {
AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, AlarmIntent.class);
PendingIntent pi = PendingIntent.getBroadcast(context, 0, intent, 0);
//After after 30 seconds
am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, System.currentTimeMillis(), 10000, pi);
context.getSystemService(Context.CONNECTIVITY_SERVICE);
mMap.clear();
mMap.setMyLocationEnabled(true);
mMap.getUiSettings().setMyLocationButtonEnabled(false);
LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
String provider = locationManager.getBestProvider(criteria, true);
myLocation = locationManager.getLastKnownLocation(provider);
latitudeCurrentPosition = myLocation.getLatitude();
longitudeCurrentPosition = myLocation.getLongitude();
LatLng latLngCurrent = new LatLng(latitudeCurrentPosition, longitudeCurrentPosition);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLngCurrent));
mMap.animateCamera(CameraUpdateFactory.zoomTo(distZoom));
currentPattern = shortTest;
showNotification(context);
mHereIAm = mMap.addMarker(new MarkerOptions()
.position(new LatLng(latitudeCurrentPosition, longitudeCurrentPosition))
.title(weAreHere)
.draggable(false)
.icon(BitmapDescriptorFactory
.fromResource(R.drawable.marker_iconv3)));
mHereIAm.setTag(0);
mHereIAm.showInfoWindow();
}
AndroidManifest permissions:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
But at the long of 10000, Android Studio is telling me "Value will be forced up to 60000 as of Android 5.1; don't rely on this to be exact..." etc. So an AlarmManager isn't useful either.
With the last code, my app isn't even running anymore.
But still: vibrations and stuff still occur, but location updates don't.
In short:
I need some basic (at least, I think it just can't be so difficult, as the only problem is that it's not working when the screen is locked) code, that updates my location on a certain, variable interval.
Maybe I have to use a Handler/Runnable, start a new Thread, use a Service or a Broadcast Receiver. Maybe an AlarmManager may work as well, but I don't know how and which to use.
This is my first post. If anything misses or you guys need more information, please ask. I'm trying to be as precise as possible, without using to much overhead.
Edit 01
Can I use a Job Service to do so? - I've updated the API to 21, so I can make use of this service, but I don't know if that's the right solution I'm looking for? Got some great tutorials for the use of it.
Edit 02
Let me be more clear with less overhead: I am looking for a solution to get the user's current location when the device is locked: with an API, a Service, an IntentService, a BroadcastReceiver, ... - every tutorial tells me something different, even here at Stack Overflow I have troubles with finding the right solution.
I was able to use a Service as well as an Intent Service, but I cannot request any location updates, because of some errors, like:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.name.name/com.name.name.MapsActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.google.android.gms.maps.GoogleMap.setMyLocationEnabled(b‌​oolean)' on a null object reference - searching for a solution for this error, gives me another error later on, and on, and on... I got myself stuck in an error-loop and a lot of unnecessary code.
I hope there is a simple way to get the user's location and you guys could help me. Thanks again.
Edit 03
I've followed the instructions on this tutorial and the location is checking. See the following code:
public class LocationService extends Service implements LocationListener {
private final Context mContext;
// flag for GPS status
boolean isGPSEnabled = false;
// flag for network status
boolean isNetworkEnabled = false;
// flag for GPS status
boolean canGetLocation = false;
Location location; // location
double latitude; // latitude
double longitude; // longitude
// The minimum distance to change Updates in meters
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters
// The minimum time between updates in milliseconds
private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute
// Declaring a Location Manager
protected LocationManager locationManager;
public LocationService(Context context) {
this.mContext = context;
getLocation();
}
public Location getLocation() {
try {
locationManager = (LocationManager) mContext
.getSystemService(LOCATION_SERVICE);
// getting GPS status
isGPSEnabled = locationManager
.isProviderEnabled(LocationManager.GPS_PROVIDER);
// getting network status
//isNetworkEnabled = locationManager
// .isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled) {
// no network provider is enabled
} else {
this.canGetLocation = true;
// First get location from Network Provider
if (isNetworkEnabled) {
locationManager.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("Network", "Network");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
// if GPS Enabled get lat/long using GPS Services
if (isGPSEnabled) {
if (location == null) {
locationManager.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MIN_TIME_BW_UPDATES,
MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
Log.d("GPS Enabled", "GPS Enabled");
if (locationManager != null) {
location = locationManager
.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return location;
}
/**
* Stop using GPS listener
* Calling this function will stop using GPS in your app
* */
public void stopUsingGPS(){
if(locationManager != null){
locationManager.removeUpdates(LocationService.this);
}
}
/**
* Function to get latitude
* */
public double getLatitude(){
if(location != null){
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
/**
* Function to get longitude
* */
public double getLongitude(){
if(location != null){
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
/**
* Function to check GPS/wifi enabled
* #return boolean
* */
public boolean canGetLocation() {
return this.canGetLocation;
}
/**
* Function to show settings alert dialog
* On pressing Settings button will lauch Settings Options
* */
public void showSettingsAlert(){
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
// Setting Dialog Title
alertDialog.setTitle("GPS is settings");
// Setting Dialog Message
alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?");
// On pressing Settings button
alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
}
});
// on pressing cancel button
alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
}
#Override
public void onLocationChanged(Location location) {
}
#Override
public void onProviderDisabled(String provider) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public IBinder onBind(Intent arg0) {
return null;
}
}
I've disabled Network location and only allowed GPS location for testing - tested both.
And my MapsActivity:
public void getLocation(){
gps = new LocationService(MapsActivity.this);
if(gps.canGetLocation()) { // gps enabled} // return boolean true/false
latitudeCurrentPosition = gps.getLatitude(); // returns latitude
longitudeCurrentPosition = gps.getLongitude(); // returns longitude
latLngCurrent = new LatLng(latitudeCurrentPosition, longitudeCurrentPosition);
Toast toastLatCur = makeText(getApplicationContext(), "Lat Current: " + latitudeCurrentPosition + "" ,Toast.LENGTH_SHORT);
toastLatCur.show();
Toast toastLongCur = makeText(getApplicationContext(), "Long Current: " + longitudeCurrentPosition + "" ,Toast.LENGTH_SHORT);
toastLongCur.show();
}
else {
gps.showSettingsAlert();
}
if(goToLocation){
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLngCurrent));
goToLocation = false;
if(firstStart){
mMap.animateCamera(CameraUpdateFactory.zoomTo(distZoom));
firstStart = false;
}
}
vibrateNotification();
}
When the screen is locked, the phone vibrates as I told in vibrateNotificatoin() - works perfectly every 10 seconds. But the location doesn't get updated! So a Service is not the right way to solve this. Help!

You should use the service to perform tasks which are needed to be done even when the application is not running. Give a try.

Occasionally getting callbacks after removeLocationUpdates()

Creating my first app,
Looking for locations using the GoogleApi and the callback is working as intended. I use the location and it gets put into a database, onDestroy() I am closing the DB connection. But now I occasionally get a stack trace saying
java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase
I added a removeLocationUpdates() right before the closeDB call, and that MOSTLY solved the issue, but it still happens from time to time. It appears that I may still be getting a rogue callback after removeLocationUpdates and closeDB have been called.
Is this a typical delay? could a 500ms delay between the removeLocUpdates and the closeDB fix the issue? I'd imagine there'd be a better way, or that maybe I am simply doing something wrong with the removeLocUpdates. But the stack trace seems pretty clear that I am getting a callback as the trace shows
onLocationChanged
part way down the stack
EDIT to add Code:
onCreate():
openDB();
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
//End Google Location API implementation
locationListener = new com.google.android.gms.location.LocationListener() {
#Override
public void onLocationChanged(Location location) {
//newestLocation = location;
//bestLocation = bestLocation();
//todo maybe come back and reimplement bestLocation() if needed
bestLocation = location;
getCode(null);
saveCode(null);
}};
onDestroy()
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, locationListener);
}
}
closeDB();
onConnected()
public void onConnected(#Nullable Bundle bundle) {
CharSequence text = "Google API Connected";
Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
LocationRequest locationRequest = new LocationRequest()
.setFastestInterval(500)
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setMaxWaitTime(3000)
.setInterval(1000);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.ACCESS_FINE_LOCATION},10);
return;
}else {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, locationRequest, locationListener);
}
return;
}
I appreciate your help on the matter