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Start Gps Tracking again when the android application On-Resumes()

I have build a system which is based upon tracking users current location dynamically as they move around places. The system works perfectly and updates current location of the users time after time into the firebase database. however when the application is minimized and resumed again to the same activity which is a map of course, it only shows the location of the user but does not update it in the fire-base database. now i know that the activity starts again from the OnResume() method, i have tried several things but every time i try to do something, it most of the time says that googleapiClient is not connected and then crashes right away. without manipulating the onResume, the app works perfectly but that does not update user position into the fire-base when the app is minimized and reopened from the onResume method. What should i do to the onResume() method that it starts sending user dynamic location into the firebase???
Below i have posted my code. Any help would be appreciated Thank You.
public class RequestLocationMap extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks
, GoogleApiClient.OnConnectionFailedListener
, LocationListener {
private static final String TAG = "RequestLocationMap";
private GoogleMap mMap;
private GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private Location lastLocation;
private Marker currentUserLocationMarker;
public static final int Request_User_Location_Code = 99;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_request_location_map);
Log.d(TAG, "onCreate: called");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkUserLocationPermission();
}
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
Log.d(TAG, "onMapReady: called");
mMap = googleMap;
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mMap.setMyLocationEnabled(true);
}
}
public boolean checkUserLocationPermission() {
Log.d(TAG, "checkUserLocationPermission: called");
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, Request_User_Location_Code);
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, Request_User_Location_Code);
}
return false;
} else {
return true;
}
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
Log.d(TAG, "onRequestPermissionsResult: here");
switch (requestCode) {
case Request_User_Location_Code:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
if (googleApiClient == null) {
buildGoogleApiClient();
}
mMap.setMyLocationEnabled(true);
}
} else {
Toast.makeText(this, "Application requires location permission", Toast.LENGTH_SHORT).show();
}
}
}
protected synchronized void buildGoogleApiClient() {
Log.d(TAG, "buildGoogleApiClient: called");
googleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
googleApiClient.connect();
}
#Override
public void onConnected(#Nullable Bundle bundle) {
Log.d(TAG, "onConnected: called");
locationRequest = new LocationRequest();
locationRequest.setInterval(1000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
builder.setAlwaysShow(true);
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(googleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
#Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
try {
status.startResolutionForResult(
RequestLocationMap.this, 1000);
} catch (IntentSender.SendIntentException e) {
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
break;
}
}
});
if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
#Override
public void onLocationChanged(Location location) {
Log.d(TAG, "onLocationChanged: called");
lastLocation = location;
if (currentUserLocationMarker != null) {
currentUserLocationMarker.remove();
}
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Location");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
currentUserLocationMarker = mMap.addMarker(markerOptions);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(14f));
DatabaseReference myTracking = FirebaseDatabase.getInstance().getReference().child("MyTracking");
GeoFire geoFire = new GeoFire(myTracking);
geoFire.setLocation(FirebaseAuth.getInstance().getCurrentUser().getUid(), new GeoLocation(location
.getLatitude(), location.getLongitude()));
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Log.d(TAG, "onActivityResult: called");
switch (requestCode) {
case 1000:
switch (resultCode) {
case Activity.RESULT_OK: {
break;
}
case Activity.RESULT_CANCELED: {
// The user was asked to change settings, but chose not to
Toast.makeText(RequestLocationMap.this, "App required location permission", Toast.LENGTH_LONG).show();
finish();
break;
}
default: {
break;
}
}
break;
}
}
#Override
protected void onStop() {
Log.d(TAG, "onStop: called");
super.onStop();
LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
DatabaseReference myTracking = FirebaseDatabase.getInstance().getReference().child("MyTracking");
GeoFire geoFire = new GeoFire(myTracking);
geoFire.removeLocation(FirebaseAuth.getInstance().getCurrentUser().getUid());
}
#Override
protected void onResume() {
Log.d(TAG, "onResume: called");
super.onResume();
}
}

The problem with your app is that in the lifecycle method onStop() you request to stop receiving location updates from the FusedLocation API, but in the reciprocal method of onResume(). you never request for location updates. Furthermore, with the way your code is structured even if you did register for location updates inside of onResume(), you'd run into a problem with the GoogleClient API because it may not (more than likely, isn't) connected by the time onResume() gets executed.
I recommend that you call the method buildGoogleApiClient() from onResume instead of onCreate() (still perform the permissions check). This way the GoogleClient API is always connected while the activity is resumed. Remember to call "disconnect" on the GoogleClient API inside of onPause(). Inside of the location listener callback method you should perform a null check on the GoogleMap reference to prevent any NP-exceptions. GoogleMaps may be null during the first few executions of onLocationChanged(Location) because it may take more time to initialize the MapFragment than it does to receive the first location update from the FusedLocation API. I've seen the location API deliver a location update milliseconds after I requested updates.
Also, just good practice you should pair lifecycle methods with their reciprocals:
onCreate() -> onDestroy()
onStart() -> onStop()
onResume -> onPause()
Mixing and matching lifecycle callbacks can bite you down the line when you expecting a happens-before relationship, such as registering and deregistering for location updates when the app is paused and resumed.

display current location in MapFragment

I have a location class which creates an instance on MapFragment, and dependant on which activity the map is created from, will drop a different marker. I would also like the map to display a marker for the phones current location.
I'm assuming I can do something like this, but I cant work out how to get and update the phones current coordinates and assign that to myLocation.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_location);
MapFragment googleMap = (MapFragment) getFragmentManager().findFragmentById(R.id.map);
googleMap.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap nMap){
if(MainMenu.bkSource == true) {
LatLng bkLatLng = new LatLng(54.5816008, -5.9651271);
LatLng myLocation = new LatLng(???);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("Burger King, Boucher Road"));
nMap.addMarker(new MarkerOptions().position(myLocation).title("You Are Here");
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
if(MainMenu.kfcSource == true){
LatLng bkLatLng = new LatLng(54.5771914, -5.9620562);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("KFC, Boucher Road"));
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
if(MainMenu.mcdSource == true){
LatLng bkLatLng = new LatLng(54.5879486, -5.9580009);
nMap.addMarker(new MarkerOptions().position(bkLatLng).title("McDonald's, Boucher Road"));
nMap.moveCamera(CameraUpdateFactory.newLatLngZoom(bkLatLng, 15));
nMap.animateCamera(CameraUpdateFactory.zoomTo(18.0f));
}
}

Here is an example Fragment that extends SupportMapFragment, on launch it will get the user's current location, place a Marker, and zoom in:
public class MapFragment extends SupportMapFragment
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
#Override
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
if (mGoogleMap == null) {
getMapAsync(this);
}
}
#Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
#Override
public void onMapReady(GoogleMap googleMap)
{
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(getActivity())
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
#Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
#Override
public void onConnectionSuspended(int i) {}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
#Override
public void onLocationChanged(Location location)
{
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,11));
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(getActivity())
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(getActivity(),
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(getActivity(),
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(getActivity(), "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
Since the Location permission request needs to go through the Activity, you will need to route the result from the Activity to the Fragment's onRequestPermissionsResult() method:
public class MainActivity extends AppCompatActivity {
MapFragment mapFragment;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mapFragment = new MapFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.add(R.id.mapframe, mapFragment);
transaction.commit();
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
if (requestCode == MapFragment.MY_PERMISSIONS_REQUEST_LOCATION){
mapFragment.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
The layout just contains a FrameLayout where the MapFragment goes.
activity_main.xml:

Use the following code for get current location:
#Override
public void onMapReady(GoogleMap googleMap) {
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);
}
If you want to add marker in current Location try this:
1.Implement LocationListener In your Activity.
2.Update LocationRequest:
LocationRequest mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000); //5 seconds
mLocationRequest.setFastestInterval(3000); //3 seconds
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
3.create your marker on onLocationChanged(Location location)
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(this, Locale.getDefault());
//place marker at current position
//mGoogleMap.clear();
Marker currLocationMarker;
if (currLocationMarker != null) {
currLocationMarker.remove();
}
latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position.......");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
currLocationMarker = mMap.addMarker(markerOptions);
}
}

Application Crash on API 23 during use of FusedLocationApi

Actually i created a application to show the nearest Fuel station, so i use the FusedLocationApi for that, and in the code first i check the use location is enabled or not, If no than i build GoogleClient and call setingsrequest() function and if location is ON than application works perfectly but when location OFF than aaplication is crash.. please check logs
logs :
E/UncaughtException: java.lang.IllegalStateException: GoogleApiClient
is not connected yet.
at com.google.android.gms.internal.zzbcc.zze(Unknown Source)
at com.google.android.gms.internal.zzbcw.zze(Unknown Source)
at com.google.android.gms.internal.zzbco.zze(Unknown Source)
at
com.google.android.gms.internal.zzcca.requestLocationUpdates(Unknown
Source)
at
activities.FuelStations.onConnected(FuelStations.java:356)
at com.google.android.gms.common.internal.zzac.zzn(Unknown Source)
at com.google.android.gms.internal.zzbco.zzm(Unknown Source)
at com.google.android.gms.internal.zzbcc.zzpY(Unknown Source)
at com.google.android.gms.internal.zzbcc.onConnected(Unknown Source)
at com.google.android.gms.internal.zzbcw.onConnected(Unknown Source)
at com.google.android.gms.internal.zzbbh.onConnected(Unknown Source)
at com.google.android.gms.common.internal.zzaa.onConnected(Unknown
Source)
at com.google.android.gms.common.internal.zzn.zzrj(Unknown Source)
at com.google.android.gms.common.internal.zze.zzs(Unknown Source)
at com.google.android.gms.common.internal.zzi.zzrk(Unknown Source)
at com.google.android.gms.common.internal.zzh.handleMessage(Unknown
Source)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Updated code:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
setContentView(R.layout.activity_fuel_stations);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
LocationManager mlocManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
final boolean enabled = mlocManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if(!enabled) {
mGoogleApiClient.connect();
setingsrequest();
}
else
{
init();
}
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
public void setingsrequest()
{
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(30 * 1000);
locationRequest.setFastestInterval(5 * 1000);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(locationRequest);
builder.setAlwaysShow(true); //this is the key ingredient
PendingResult<LocationSettingsResult> result =
LocationServices.SettingsApi.checkLocationSettings(mGoogleApiClient, builder.build());
result.setResultCallback(new ResultCallback<LocationSettingsResult>() {
#Override
public void onResult(LocationSettingsResult result) {
final Status status = result.getStatus();
final LocationSettingsStates state = result.getLocationSettingsStates();
switch (status.getStatusCode()) {
case LocationSettingsStatusCodes.SUCCESS:
// All location settings are satisfied. The client can initialize location
// requests here.
break;
case LocationSettingsStatusCodes.RESOLUTION_REQUIRED:
// Location settings are not satisfied. But could be fixed by showing the user
// a dialog.
try {
// Show the dialog by calling startResolutionForResult(),
// and check the result in onActivityResult().
status.startResolutionForResult(FuelStations.this, REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e) {
// Ignore the error.
}
break;
case LocationSettingsStatusCodes.SETTINGS_CHANGE_UNAVAILABLE:
// Location settings are not satisfied. However, we have no way to fix the
// settings so we won't show the dialog.
break;
}
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
// Check for the integer request code originally supplied to startResolutionForResult().
case REQUEST_CHECK_SETTINGS:
switch (resultCode) {
case Activity.RESULT_OK:
Toast.makeText(getApplicationContext(),"Location is on",Toast.LENGTH_SHORT).show();
init();
break;
case Activity.RESULT_CANCELED:
//keep asking if imp or do whatever
finish();
break;
}
break;
}
}
private void init(){
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap;
tempGoogleMap = mGoogleMap;
//MAP_FLAG=1;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
} else {
checkLocationPermission();
}
} else {
mGoogleApiClient.connect();
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.getUiSettings().setMapToolbarEnabled(true);
//the below listener is depreceated so i have to find a different way
// mGoogleMap.setOnMyLocationButtonClickListener(myLocationChangeListener);
mGoogleMap.setOnMyLocationButtonClickListener(new GoogleMap.OnMyLocationButtonClickListener() {
#Override
public boolean onMyLocationButtonClick() {
Location loc = mGoogleMap.getMyLocation();
LatLng currentLoc = new LatLng(loc.getLatitude(), loc.getLongitude());
mGoogleMap.clear();
markerOptions.position(currentLoc);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(currentLoc,15.0f));
nearestFuelStation();
return true;
}
});
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(this)
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(FuelStations.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
Intent intent= new Intent(getApplicationContext(),MainMenu.class);
startActivity(intent);
finish();
return true;
}
return super.onOptionsItemSelected(item);
}
#Override
public void onConnected(Bundle bundle) {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, 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;
} startLocationUpdates();
mLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLocation == null){
startLocationUpdates();
}
if (mLocation != null) {
double latitude = mLocation.getLatitude();
double longitude = mLocation.getLongitude();
} else {
// Toast.makeText(this, "Location not Detected", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onConnectionSuspended(int i) {
if (i == CAUSE_SERVICE_DISCONNECTED) {
Toast.makeText(this, "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show();
} else if (i == CAUSE_NETWORK_LOST) {
Toast.makeText(this, "Network lost. Please re-connect.", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(getApplicationContext(),"Connection Failed",Toast.LENGTH_SHORT).show();
}
#Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
if (mGoogleMap!=null)
mGoogleMap.clear();
//Place current location marker
latitude = location.getLatitude();
longitude = location.getLongitude();
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
mGoogleMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,15.0f));
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
nearestFuelStation();
}
private void nearestFuelStation() {
String FuelStation = "gas_station";
}
private String getUrl(double latitude, double longitude, String nearbyPlace) {
}
#Override
protected void onStart() {
if(mGoogleApiClient != null){
mGoogleApiClient.connect();
}
super.onStart();
Log.d("client value", String.valueOf(mGoogleApiClient.isConnected()));
}
#Override
protected void onResume() {
super.onResume();
}
#Override
protected void onStop() {
// Disconnecting the client invalidates it.
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
if(mGoogleApiClient!=null){
{
mGoogleApiClient.disconnect();}
}
super.onStop();
}
// Trigger new location updates at interval
protected void startLocationUpdates() {
// Create the location request
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,
mLocationRequest, this);
}
}
}

you are trying to access location before mGoogleApiClient is connected,call setingsrequest() method from onConnected method that executed on mGoogleApiClient is connected
replace
#Override
protected void onResume() {
super.onResume();
mGoogleApiClient.connect();
}
with
#Override
public void onConnected(Bundle bundle) {
LocationManager mlocManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
final boolean enabled = mlocManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!enabled) {
setingsrequest();
} else {
init();
}
}

onLocationChanged is not calling

hey this is my code for retrieving users location periodically
#Override
protected void onCreate(Bundle savedInstanceState) {
buildGoogleApiClient();
}
private void prepareLocationServices() {
int permissionCheck = ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.ACCESS_FINE_LOCATION);
if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
} else {
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = service
.isProviderEnabled(LocationManager.GPS_PROVIDER);
if (!enabled) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
} else {
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(1000);
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
}
}
private void buildGoogleApiClient() {
if (GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(this) == ConnectionResult.SUCCESS) {
googleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
if (!googleApiClient.isConnected() || !googleApiClient.isConnecting()) {
googleApiClient.connect();
}
}
}
#Override
public void onLocationChanged(Location location) {
lat = location.getLatitude();
lng = location.getLongitude();
Log.d("location", location.toString());
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String permissions[], #NonNull int[] grantResults) {
switch (requestCode) {
case 1: {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
prepareLocationServices();
}
}
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
#Override
public void onConnected(#Nullable Bundle bundle) {
prepareLocationServices();
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
buildGoogleApiClient();
}
but onLocationChanged is not calling at all while I have Cellular Data and GPS enabled. What is wrong?

Map marker doesn't track me

I have an app: Map&Location. When I move the blue point indicator moves along with me but the marker doesn't. It stays fixed in one place, does anybody know what the problem is?
public class MapsActivity extends AppCompatActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
}
#Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
#Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
#Override
public void onConnected(#Nullable Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
#Override
public void onLocationChanged(Location location) {
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(11));
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
try {
List<Address> listAddress = geocoder.getFromLocation(location.getLatitude(),location.getLongitude(),1);
if(listAddress!=null&&listAddress.size()>0){
Log.i("Place info",listAddress.get(0).toString());
}
} catch (IOException e) {
e.printStackTrace();
}
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public boolean checkLocationPermission(){
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)) {
//TODO:
// Show an expanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
//Prompt the user once explanation has been shown
//(just doing it here for now, note that with this code, no explanation is shown)
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}

You are removing location update when the first onLocationChange triggers.
Remove these lines:
//stop location updates
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}