Develop Reference

How to use latitude and longitude retrieved from a service and show them on map?

I have defined a service (i.e. LocationService ) which gives me users's current latitude and longitude as an intent extras to my_activity. Now , I want to use them to show current location on map (using Google maps) . I passed these latlng in mMap.animateCamera and mMap.moveCamera methods but they are not showing any Marker or zoom in to the current location . Please tell me if I am doing anything wrong .
Code for the LocationService and my MainActivity is pasted below :
LocationServices.java
public class LocationServicesForLocationUpdates extends Service implements LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener{
private static final String TAG = LocationServicesForLocationUpdates.class.getSimpleName();
public static final String ACTION_LOCATION_BROADCAST
= LocationServicesForLocationUpdates.class.getName() + "LocationBroadcast";
public static final String EXTRA_LATITUDE = "extra_latitude";
public static final String EXTRA_LONGITUDE = "extra_longitude";
private GoogleApiClient mLocationClient;
private LocationRequest mLocationRequest = new LocationRequest();
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
mLocationClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setInterval(5000);
mLocationRequest.setFastestInterval(3000);
mLocationClient.connect();
// return super.onStartCommand(intent, flags, startId);
return START_STICKY;
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
/*
* LOCATION CALLBACKS
*/
#Override
public void onConnected(Bundle dataBundle) {
if (ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// 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.
Log.d(TAG, "== Error On onConnected() Permission not granted");
//Permission not granted by user so cancel the further execution.
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mLocationClient, mLocationRequest ,this);
Log.d(TAG, "Connected to Google API");
}
//to get the location change
#Override
public void onLocationChanged(Location location) {
Log.d(TAG, "Location changed");
if (location != null) {
Log.d(TAG, "== location != null");
//Send result to activities
sendMessageToUI(String.valueOf(location.getLatitude()), String.valueOf(location.getLongitude()));
}
}
private void sendMessageToUI(String lat, String lng) {
Log.d(TAG, "Sending info...");
Intent intent = new Intent(ACTION_LOCATION_BROADCAST);
intent.putExtra(EXTRA_LATITUDE, lat);
intent.putExtra(EXTRA_LONGITUDE, lng);
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
}
}
New MainActivity.java
public class MainActivity extends AppCompatActivity implements OnMapReadyCallback{
private TextView mLatlngTxtVu , mAddressTxtVu;
private boolean mAlreadyStartedService;
private static final String TAG = ParentHomeActivity.class.getSimpleName();
private static final int REQUEST_PERMISSIONS_REQUEST_CODE = 34;
private GoogleMap mGoogleMap;
Double mlattitude , mlongitude;
Marker mCurrentMarker;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_parent_home);
Log.d(TAG, "onCreate: Called");
mLatlngTxtVu = (TextView) findViewById(R.id.latlng_txtview);
mAddressTxtVu = (TextView) findViewById(R.id.address_txtvu);
LocalBroadcastManager.getInstance(this).registerReceiver(
new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
mlattitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LATITUDE));
mlongitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LONGITUDE));
Log.d("latlng", "onReceive: " + mlongitude + mlattitude);
if (mlattitude != null && mlongitude != null) {
mLatlngTxtVu.setText("Latitude : " + mlattitude + "Longitude: " + mlongitude);
}
}
}, new IntentFilter(LocationServicesForLocationUpdates.ACTION_LOCATION_BROADCAST)
);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.main_map);
mapFragment.getMapAsync(MainActivity.this);
}
#Override
protected void onResume() {
super.onResume();
checkGooglePlayServices();
}
#Override
public void onMapReady(GoogleMap googleMap) {
mGoogleMap = googleMap ;
Log.d(TAG, "onMapReady: called");
Log.d("coord", mlattitude + " " + mlongitude);
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;
}
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.getUiSettings().setMyLocationButtonEnabled(true);
mGoogleMap.getUiSettings().setMapToolbarEnabled(false);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(mlattitude, mlongitude)) // Sets the center of the map to location user
.zoom(14) // Sets the zoom
.bearing(0) // Sets the orientation of the camera to east
.tilt(90) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
mGoogleMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
LatLng latLng = new LatLng(mlattitude , mlongitude);
mGoogleMap.addMarker(new MarkerOptions().position(latLng).title("YOU"));
// mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
/* CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(mlattitude, mlongitude)) // Sets the center of the map to location user
.zoom(17) // Sets the zoom
.bearing(90) // Sets the orientation of the camera to east
.tilt(40) // Sets the tilt of the camera to 30 degrees
.build(); // Creates a CameraPosition from the builder
mGoogleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));*/
}
private void checkGooglePlayServices() {
//Check whether this user has installed Google play service which is being used by Location updates.
if (isGooglePlayServicesAvailable()) {
//Passing null to indicate that it is executing for the first time.
checkAndPromptForInternetConnection(null);
} else {
Toast.makeText(getApplicationContext(), "Play services Not Available", Toast.LENGTH_LONG).show();
}
}
private boolean checkAndPromptForInternetConnection(DialogInterface dialog) {
ConnectivityManager connectivityManager
= (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
if (activeNetworkInfo == null || !activeNetworkInfo.isConnected()) {
promptInternetConnect();
return false;
}
if (dialog != null) {
dialog.dismiss();
}
//Yes there is active internet connection. Next check Location is granted by user or not.
if (checkPermissions()) { //Yes permissions are granted by the user. Go to the next step.
startedLocationServices();
} else { //No user has not granted the permissions yet. Request now.
requestPermissions();
}
return true;
}
/**
* Step 3: Start the Location Monitor Service
*/
private void startedLocationServices() {
//And it will be keep running until you close the entire application from task manager.
//This method will executed only once.
if (!mAlreadyStartedService && mLatlngTxtVu != null) {
mLatlngTxtVu.setText("Running ");
//Start location sharing service to app server.........
Intent intent = new Intent(this, LocationServicesForLocationUpdates.class);
startService(intent);
mAlreadyStartedService = true;
//Ends................................................
}
}
/**
* Show A Dialog with button to refresh the internet state.
*/
private void promptInternetConnect() {
AlertDialog.Builder builder = new AlertDialog.Builder(ParentHomeActivity.this);
builder.setTitle("No internet connection");
builder.setMessage("Please Check your internet connection");
String positiveText = "Refresh";
builder.setPositiveButton(positiveText,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//Block the Application Execution until user grants the permissions
if (checkAndPromptForInternetConnection(dialog)) {
//Now make sure about location permission.
if (checkPermissions()) {
//Step 2: Start the Location Monitor Service
//Everything is there to start the service.
startedLocationServices();
} else if (!checkPermissions()) {
requestPermissions();
}
}
}
});
AlertDialog dialog = builder.create();
dialog.show();
}
/**
* Return the availability of GooglePlayServices
*/
public boolean isGooglePlayServicesAvailable() {
GoogleApiAvailability googleApiAvailability = GoogleApiAvailability.getInstance();
int status = googleApiAvailability.isGooglePlayServicesAvailable(this);
if (status != ConnectionResult.SUCCESS) {
if (googleApiAvailability.isUserResolvableError(status)) {
googleApiAvailability.getErrorDialog(this, status, 2404).show();
}
return false;
}
return true;
}
/**
* Return the current state of the permissions needed.
*/
private boolean checkPermissions() {
int permissionState1 = ActivityCompat.checkSelfPermission(this,
android.Manifest.permission.ACCESS_FINE_LOCATION);
int permissionState2 = ActivityCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_COARSE_LOCATION);
return permissionState1 == PackageManager.PERMISSION_GRANTED && permissionState2 == PackageManager.PERMISSION_GRANTED;
}
/**
* Start permissions requests.
*/
private void requestPermissions() {
boolean shouldProvideRationale =
ActivityCompat.shouldShowRequestPermissionRationale(this,
android.Manifest.permission.ACCESS_FINE_LOCATION);
boolean shouldProvideRationale2 =
ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_COARSE_LOCATION);
// Provide an additional rationale to the img_user. This would happen if the img_user denied the
// request previously, but didn't check the "Don't ask again" checkbox.
if (shouldProvideRationale || shouldProvideRationale2) {
Log.i(TAG, "Displaying permission rationale to provide additional context.");
showSnackbar(R.string.grantPermission,
android.R.string.ok, new View.OnClickListener() {
#Override
public void onClick(View view) {
// Request permission
ActivityCompat.requestPermissions(ParentHomeActivity.this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
REQUEST_PERMISSIONS_REQUEST_CODE);
}
});
} else {
Log.i(TAG, "Requesting permission");
// Request permission. It's possible this can be auto answered if device policy
// sets the permission in a given state or the img_user denied the permission
// previously and checked "Never ask again".
ActivityCompat.requestPermissions(ParentHomeActivity.this,
new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},
REQUEST_PERMISSIONS_REQUEST_CODE);
}
}
/**
* Shows a {#link Snackbar}.
*
* #param mainTextStringId The id for the string resource for the Snackbar text.
* #param actionStringId The text of the action item.
* #param listener The listener associated with the Snackbar action.
*/
private void showSnackbar(final int mainTextStringId, final int actionStringId,
View.OnClickListener listener) {
Snackbar.make(
findViewById(android.R.id.content),
getString(mainTextStringId),
Snackbar.LENGTH_INDEFINITE)
.setAction(getString(actionStringId), listener).show();
}
/**
* Callback received when a permissions request has been completed.
*/
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions,
#NonNull int[] grantResults) {
Log.i(TAG, "onRequestPermissionResult");
if (requestCode == REQUEST_PERMISSIONS_REQUEST_CODE) {
if (grantResults.length <= 0) {
// If img_user interaction was interrupted, the permission request is cancelled and you
// receive empty arrays.
Log.i(TAG, "User interaction was cancelled.");
} else if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.i(TAG, "Permission granted, updates requested, starting location updates");
startedLocationServices();
} else {
// Permission denied.
// Notify the img_user via a SnackBar that they have rejected a core permission for the
// app, which makes the Activity useless. In a real app, core permissions would
// typically be best requested during a welcome-screen flow.
// Additionally, it is important to remember that a permission might have been
// rejected without asking the img_user for permission (device policy or "Never ask
// again" prompts). Therefore, a img_user interface affordance is typically implemented
// when permissions are denied. Otherwise, your app could appear unresponsive to
// touches or interactions which have required permissions.
showSnackbar(R.string.permissionDenied,
R.string.settings, new View.OnClickListener() {
#Override
public void onClick(View view) {
// Build intent that displays the App settings screen.
Intent intent = new Intent();
intent.setAction(
Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package",
BuildConfig.APPLICATION_ID, null);
intent.setData(uri);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
});
}
}
}
#Override
public void onDestroy() {
//Stop location sharing service to app server.........
stopService(new Intent(this, LocationServicesForLocationUpdates.class));
mAlreadyStartedService = false;
//Ends................................................
super.onDestroy();
}
}
Feel free to ask any queries in case you don't understand my problem and tell me the correct approach to solve my problem . I am new to android app development.

in onMapReady() please create a new LatLng position and add it in as MarkerOption
#Override
public void onMapReady(GoogleMap googleMap) {
.......
.......
// make sure you are getting your latitude and longitude string value
mlattitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LATITUDE));
mlongitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LONGITUDE));
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(mLattitude,mlongitude)) // My position
.zoom(14) // Zoom Level
.bearing(0) // camera position, (0 north , 180 south )
.tilt(90) // Inclinaison de la camera
.build();
googleMap.moveCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));
LatLng position = new LatLng(mlattitude,mlongitude);
googleMap.addMarker(new MarkerOptions().position(position)
.title("my marker"));
}
edit
Do not forget to call getMapAsync in your onReceive() method
LocalBroadcastManager.getInstance(this).registerReceiver(
new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
mlattitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LATITUDE));
mlongitude = Double.parseDouble(intent.getStringExtra(LocationServicesForLocationUpdates.EXTRA_LONGITUDE));
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.main_map);
mapFragment.getMapAsync(MainActivity.this);
Log.d("latlng", "onReceive: " + mlongitude + mlattitude);
if (mlattitude != null && mlongitude != null) {
mLatlngTxtVu.setText("Latitude : " + mlattitude + "Longitude: " + mlongitude);
}
}
}, new IntentFilter(LocationServicesForLocationUpdates.ACTION_LOCATION_BROADCAST)
);
);

You can do like that :
public class MapsMarkerActivity extends AppCompatActivity
implements OnMapReadyCallback {
// Include the OnCreate() method here too, as described above.
#Override
public void onMapReady(GoogleMap googleMap) {
// Add a marker in Sydney, Australia,
// and move the map's camera to the same location.
LatLng sydney = new LatLng(-33.852, 151.211);
googleMap.addMarker(new MarkerOptions().position(sydney)
.title("Marker in Sydney"));
googleMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
}
}
The code is from the Google documentation page

Why won't Google maps auto zoom to user location when it first starts?

When the user first enters the GoogleMapsActivity it does not automatically take them to their location, the user has to click the little location icon button at the top right and it will take them to their location.
I have tried using newLatLngZoom(latLng, zoom) but that didn't work. And I went through all the suggested questions before posting this question, and none worked. Some were in iOS too. I am using Android.
public class AppetiteMapsActivity extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, com.google.android.gms.location.LocationListener
{
private GoogleMap mMap;
private GoogleApiClient googleApiClient;
private LocationRequest locationRequest;
private static final String TAG = "AppetiteMapsActivity";
private Location lastLocation;
private Marker currentUserLocationMarker;
private LocationManager locationManager;
private com.google.android.gms.location.LocationListener listener;
private static final int Request_User_Location_Code= 99;
private long UPDATE_INTERVAL = 2 * 1000; /* 10 secs */
private long FASTEST_INTERVAL = 2000; /* 2 sec */
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_appetite_maps);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M)
{
checkUserLocationPermission();
}
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
checkLocation();
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
// Add a marker in current user location and move the camera
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
buildGoogleApiClient();
// Call current location of user
mMap.setMyLocationEnabled(true);
}
}
public boolean checkUserLocationPermission()
{
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)
{
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, R.string.on_request_permission_gps_not_located, Toast.LENGTH_LONG).show();
}
return;
}
}
protected synchronized void buildGoogleApiClient()
{
googleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
googleApiClient.connect();
}
#Override
public void onConnected(Bundle bundle) {
{
locationRequest = new LocationRequest();
locationRequest.setInterval(1100);
locationRequest.setFastestInterval(1100);
locationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED)
{
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient, locationRequest, this);
}
}
}
#Override
public void onConnectionSuspended(int i) {
Log.i(TAG, "Connection Suspended");
googleApiClient.connect();
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i(TAG, "Connection failed. Error: " + connectionResult.getErrorCode());
}
#Override
protected void onStart() {
super.onStart();
if (googleApiClient != null) {
googleApiClient.connect();
}
}
#Override
protected void onStop() {
super.onStop();
if (googleApiClient.isConnected()) {
googleApiClient.disconnect();
}
}
protected void startLocationUpdates() {
// Create the location request
locationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(UPDATE_INTERVAL)
.setFastestInterval(FASTEST_INTERVAL);
// Request location updates
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(googleApiClient,
locationRequest, this);
Log.d("reque", "--->>>>");
}
#Override
public void onLocationChanged(Location location)
{
lastLocation = location;
if (currentUserLocationMarker!=null)
{
currentUserLocationMarker.remove();
}
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title(getString(R.string.user_current_location_marker_title));
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_YELLOW));
currentUserLocationMarker = mMap.addMarker(markerOptions);
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomBy(14));
if(googleApiClient != null)
{
LocationServices.FusedLocationApi.removeLocationUpdates(googleApiClient, this);
}
}
private boolean checkLocation() {
if(!isLocationEnabled())
showAlert();
return isLocationEnabled();
}
private void showAlert() {
final AlertDialog.Builder dialog = new AlertDialog.Builder(this);
dialog.setTitle(R.string.show_alert_title_enable_location)
.setMessage(getString(R.string.show_alert_location_settings_off_1) +
getString(R.string.show_alert_location_settings_off_2))
.setPositiveButton(R.string.show_alert_positive_button_location_settings, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(myIntent);
}
})
.setNegativeButton(R.string.explain_negative_button, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface paramDialogInterface, int paramInt) {
}
});
dialog.show();
}
private boolean isLocationEnabled() {
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
return locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER) ||
locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
}
}
I expect Google Maps to automatically go to the users location when they first go into the Google Maps Activity, but instead the user has to click the location button at the top right corner to send them there. Thanks for your help and advice in advanced!

I have tried using newLatLngZoom(latLng, zoom) but that didn't work.
Use it like this, it will work:
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
mMap.getUiSettings().setZoomControlsEnabled(true);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(LatLng, zoom));
mMap.getUiSettings().setRotateGesturesEnabled(false);
mMap.getUiSettings().setZoomControlsEnabled(false);
Note:
First, you Enable Zoom Controls.
Then, you do the Zooming thing.
After that, you Disable Zoom Controls.
Hope it helps.
Reference for more info

google map in fragment not moving to current location using fused location api

i want to display current location on map, my map is in fragment and i'm using fused location provider in non activity class, but i'm not getting current location when the map is loaded, it is giving me current location only if i press mylocation button, but i want that when map is loaded it should show my current location not the world map.
locationprovide.java
public class LocationProvider implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
public interface LocationCallback {
public void handleNewLocation(Location location);
}
public static final String TAG = LocationProvider.class.getSimpleName();
/*
* Define a request code to send to Google Play services
* This code is returned in Activity.onActivityResult
*/
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private LocationCallback mLocationCallback;
private Context mContext;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
public LocationProvider(Context context,LocationCallback locationCallback) {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mContext = context;
mLocationCallback = locationCallback;
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
}
public void connect() {
mGoogleApiClient.connect();
}
public void disconnect() {
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
#Override
public void onConnected(Bundle bundle) {
Log.i(TAG, "Location services connected.");
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(mContext, 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;
}
Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (location == null) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
else {
mLocationCallback.handleNewLocation(location);
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
/*
* Google Play services can resolve some errors it detects.
* If the error has a resolution, try sending an Intent to
* start a Google Play services activity that can resolve
* error.
*/
if (connectionResult.hasResolution() && mContext instanceof Activity) {
try {
Activity activity = (Activity)mContext;
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(activity, CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
#Override
public void onLocationChanged(Location location) {
mLocationCallback.handleNewLocation(location);
}
}
fragment
public class ChildMapFragment extends Fragment implements OnMapReadyCallback,LocationProvider.LocationCallback {
private LocationProvider mLocationProvider;
private GoogleMap mMap;
Location mLastLocation;
Marker mCurrLocationMarker;
LocationRequest mLocationRequest;
Context mContext;
String sid,cid;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_child_map, container, false);
SupportMapFragment mapFragment = (SupportMapFragment)this.getChildFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
checkLocationPermission();
}else{
mLocationProvider = new LocationProvider(mContext,this);
}
if (mLocationProvider!=null)
mLocationProvider.connect();
return view;
}
#Override
public void onViewCreated(View view, #Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
if (mLocationProvider!=null)
mLocationProvider.connect();
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mLocationProvider = new LocationProvider(mContext,this);
mMap.setMyLocationEnabled(true);
}
}
else {
mLocationProvider = new LocationProvider(mContext,this);
mMap.setMyLocationEnabled(true);
}
}
#Override
public void handleNewLocation(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 = mMap.addMarker(markerOptions);
//move map camera
mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
mMap.animateCamera(CameraUpdateFactory.zoomTo(11));
}
#Override
public void onDestroyView() {
super.onDestroyView();
mMap.clear();
}
#Override
public void onResume() {
super.onResume();
if (mLocationProvider!=null)
mLocationProvider.connect();
}
#Override
public void onPause() {
super.onPause();
if (mLocationProvider!=null)
mLocationProvider.disconnect();
}
#Override
public void onAttach(Context context) {
super.onAttach(context);
mContext=context;
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
public boolean checkLocationPermission(){
if (ContextCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Asking user if explanation is needed
if (ActivityCompat.shouldShowRequestPermissionRationale((Activity) mContext,
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.
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions((Activity) mContext,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions((Activity) mContext,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION);
}
return false;
} else {
return true;
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
#NonNull String permissions[], #NonNull 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. Do the
// contacts-related task you need to do.
if (ContextCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
mLocationProvider = new LocationProvider(mContext,this);
mMap.setMyLocationEnabled(true);
}
} else {
// Permission denied, Disable the functionality that depends on this permission.
Toast.makeText(mContext, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
}
}
}

just put the code below
if (mLocationProvider!=null){
mLocationProvider.connect();
}
where you are using
mLocationProvider = new LocationProvider(mContext,this);

How can I get continuous location updates in Android like in Google Maps?

I'm building a friend tracking android app. While my friend activated the app and goes away along with his GPS and cellular data on, I need to track him on my device. That's the concept.
I've implemented LocationListener class and now I can get the last updated location either from Gps or Network but is not updated unless I launch Google Maps and return to my application. After googling, I learned that location cache is updated only by GMaps.!
Is there an alternate way to continuously update location?
What if when I need to get continues location after the device locked without making use of Wakelock?
This is my location listener class:
package com.amazinginside;
/** AMAZING LOCATION SUPPORT CLASS, Devoloped By SANGEETH NANDAKUMAR */
import android.app.AlertDialog;
import android.app.Service;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.IBinder;
import android.provider.Settings;
public class AmazingLocation extends Service implements LocationListener
{
private final Context mContext;
boolean isGPSEnabled = false;
boolean isNetworkEnabled = false;
boolean canGetLocation = false;
Location location;
double latitude=0.0;
double longitude=0.0;
//MINIMUM DISTANCE FOR UPDATE (meters)
private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 0; // 0 Meters
//MINIMUM TIME BETWEEN UPDATES
private static final long MIN_TIME_BW_UPDATES = 1000 * 0; // 0 Seconds
//LOCATION MANAGER
protected LocationManager locationManager;
//CONSTRUCTOR
public AmazingLocation(Context context)
{
this.mContext = context;
getLocation();
}
//LOCATION PROVISION
public Location getLocation()
{
try
{
//GET LOCATION MANAGER
locationManager = (LocationManager) mContext.getSystemService(LOCATION_SERVICE);
//CHECK GPS STATE
isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
//CHECK NETWORK STATE
isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
if (!isGPSEnabled && !isNetworkEnabled)
{
//NO LOCATION PROVIDERS
}
else
{
this.canGetLocation = true;
/** GET LOCATION FROM NETWORK */
//FIRST GET LOCATION FROM NETWORK
if (isNetworkEnabled)
{
//REQUEST LOCATION
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
if (locationManager != null)
{
//START WITH LAST KNOWN LOCATION
location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//EXTRACT LOCATION
if (location != null)
{
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
/** GET LOCATION FROM GPS SENSOR */
//THEN GET LOCATION FROM GPS
if (isGPSEnabled)
{
if (location == null)
{
//REQUEST GPS LOCATION
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this);
if (locationManager != null)
{
//EXTRACT LAST KNOWN LOCATION
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
//RETURN LOCATION
if (location != null)
{
latitude = location.getLatitude();
longitude = location.getLongitude();
}
}
}
}
}
}
catch (Exception e)
{
e.printStackTrace();
}
return location;
}
//STOP GPS SENSOR
public void stopUsingGPS()
{
if(locationManager != null)
{
locationManager.removeUpdates(AmazingLocation.this);
}
}
//EXTRACT LATTITUDE
public double getLatitude()
{
if(location != null)
{
latitude = location.getLatitude();
}
// return latitude
return latitude;
}
//EXTACT LONGITUDE
public double getLongitude()
{
if(location != null)
{
longitude = location.getLongitude();
}
// return longitude
return longitude;
}
//CAN I GET THE LOCATION.?
public AmazingStatus canGetLocation()
{
AmazingStatus status=new AmazingStatus();
if(this.canGetLocation)
{
status.setStatus(true);
status.setErrorcode(0);
status.setErrormsg("Task completed");
}
else
{
status.setStatus(false);
status.setErrorcode(145);
status.setErrormsg("Please turn on GPS access manually");
}
return status;
}
//SHOW LOCATION SETTINGS
public AmazingStatus showSettingsAlert()
{
final AmazingStatus status=new AmazingStatus();
AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext);
alertDialog.setTitle("REQUIRES LOCATION ACCESS");
alertDialog.setMessage("Please allow GPS access to this app");
//POSSITIVE REPLY
alertDialog.setPositiveButton("Allow", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog,int which)
{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
mContext.startActivity(intent);
status.setStatus(true);
status.setErrorcode(0);
status.setErrormsg("Task completed");
}
});
//NEGATIVE REPLY
alertDialog.setNegativeButton("Deny", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
status.setStatus(false);
status.setErrorcode(408);
status.setErrormsg("User denied permission");
dialog.cancel();
}
});
// Showing Alert Message
alertDialog.show();
return status;
}
//UNUSED OVERRIDE METHORDS...
#Override
public void onLocationChanged(Location location)
{
getLocation();
}
#Override
public void onProviderDisabled(String provider)
{
}
#Override
public void onProviderEnabled(String provider)
{
getLocation();
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras)
{
getLocation();
}
#Override
public IBinder onBind(Intent arg0)
{
return null;
}
}
This my onCreate() method:
#Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//CREATE A BUTTON HANDLER
Button start_btn=(Button)findViewById(R.id.start_location_streaming);
//ON BUTTON CLICK EVENT
start_btn.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
//REPEAT A METHORD AT SPECIFIC INTERVALS
Timer myTimer = new Timer();
myTimer.schedule(new TimerTask()
{
#Override
public void run()
{
TimerMethod();
}
}, 0, 8000);
}
}); }
These are other methods:
private void TimerMethod()
{
//START METHORD
this.runOnUiThread(Timer_Tick);
}
//LOCATION REPORTING METHORD
private Runnable Timer_Tick = new Runnable()
{
public void run()
{
Toast.makeText(MainActivity.this, "Current latitude : "+Double.toString(getLocation().latitude), Toast.LENGTH_SHORT).show();
Toast.makeText(MainActivity.this, "Current longitude : "+Double.toString(getLocation().longitude), Toast.LENGTH_SHORT).show();
}
};
private LatLng getLocation()
{
//CREATE A LOCATION CLASS INSTANCE
AmazingLocation gps = new AmazingLocation(this);
//RETRIVE LOCATION
double latitude = gps.getLatitude();
double longitude = gps.getLongitude();
//RETURN LOCATION
LatLng loc=new LatLng(latitude,longitude);
return loc;
}
Now the problem is, the toast just shows previously known the location and not updating unless I opened Google Maps and returned.
Any help will be great for me.

Use Fused location provider in Android set your interval in that:
For an example create your activity like this:
public class LocationActivity extends Activity implements
LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "LocationActivity";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
Button btnFusedLocation;
TextView tvLocation;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mCurrentLocation;
String mLastUpdateTime;
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
setContentView(R.layout.activity_main);
tvLocation = (TextView) findViewById(R.id.tvLocation);
btnFusedLocation = (Button) findViewById(R.id.btnShowLocation);
btnFusedLocation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
updateUI();
}
});
}
#Override
public void onStart() {
super.onStart();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
Log.d(TAG, "Location update resumed .....................");
}
}
#Override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop fired ..............");
mGoogleApiClient.disconnect();
Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected());
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
#Override
public void onConnected(Bundle bundle) {
Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
startLocationUpdates();
}
protected void startLocationUpdates() {
PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.d(TAG, "Connection failed: " + connectionResult.toString());
}
#Override
public void onLocationChanged(Location location) {
Log.d(TAG, "Firing onLocationChanged..............................................");
mCurrentLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
updateUI();
}
private void updateUI() {
Log.d(TAG, "UI update initiated .............");
if (null != mCurrentLocation) {
String lat = String.valueOf(mCurrentLocation.getLatitude());
String lng = String.valueOf(mCurrentLocation.getLongitude());
tvLocation.setText("At Time: " + mLastUpdateTime + "\n" +
"Latitude: " + lat + "\n" +
"Longitude: " + lng + "\n" +
"Accuracy: " + mCurrentLocation.getAccuracy() + "\n" +
"Provider: " + mCurrentLocation.getProvider());
} else {
Log.d(TAG, "location is null ...............");
}
}
#Override
protected void onPause() {
super.onPause();
stopLocationUpdates();
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
Log.d(TAG, "Location update stopped .......................");
}
#Override
public void onResume() {
super.onResume();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
Log.d(TAG, "Location update resumed .....................");
}
}
}
Google play services required:

To get continiuos location update, you can refer to the above provided answers .
But You can also make use of LocationServices which is faster than other approaches and much easy and efficient to get location.
This approach is quit long but kindly follow all the provided steps
So let me provide a brief working :
Add these two dependencies in your gradle app file
implementation 'com.google.android.gms:play-services-maps:17.0.0'
implementation 'com.google.android.gms:play-services-location:17.0.0'
Add these permissions in the manifest file outside applicationtag
Declare variable outside onCreate
private FusedLocationProviderClient fusedLocationClient;
private LocationRequest mLocationRequest;
private LocationCallback mlocationCallback;
private LocationSettingsRequest.Builder builder;
private static final int REQUEST_CHECK_SETTINGS = 102;
Now inside onCreate :
fusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
fetchLastLocation();
mlocationCallback = new LocationCallback() {
#Override
public void onLocationResult(LocationResult locationResult) {
if (locationResult == null) {
return;
}
for (Location location : locationResult.getLocations()) {
// Update UI with location data
// ...
Log.e("CONTINIOUSLOC: ", location.toString());
}
};
};
mLocationRequest = createLocationRequest();
builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
checkLocationSetting(builder);
No define fetchLastLocation method
private void fetchLastLocation() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// Activity#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 Activity#requestPermissions for more details.
// Toast.makeText(MainActivity.this, "Permission not granted, Kindly allow permission", Toast.LENGTH_LONG).show();
showPermissionAlert();
return;
}
}
fusedLocationClient.getLastLocation()
.addOnSuccessListener(this, new OnSuccessListener() {
#Override
public void onSuccess(Location location) {
// Got last known location. In some rare situations this can be null.
if (location != null) {
// Logic to handle location object
Log.e("LAST LOCATION: ", location.toString()); // You will get your last location here
}
}
});
}
Now define other two method for permission request
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
switch (requestCode) {
case 123: {
// If request is cancelled, the result arrays are empty.
if (grantResults[0] == PackageManager.PERMISSION_DENIED) {
// permission was denied, show alert to explain permission
showPermissionAlert();
}else{
//permission is granted now start a background service
if (ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.ACCESS_COARSE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
fetchLastLocation();
}
}
}
}
}
private void showPermissionAlert(){
if (ActivityCompat.checkSelfPermission(MainHomeActivity.this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(MainHomeActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(MainHomeActivity.this, new String[]{Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION}, 123);
}
}
now define createLocationRequest method and checkLocationSetting method :
protected LocationRequest createLocationRequest() {
LocationRequest mLocationRequest = LocationRequest.create();
mLocationRequest.setInterval(30000);
mLocationRequest.setFastestInterval(10000);
mLocationRequest.setSmallestDisplacement(30);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
return mLocationRequest;
}
private void checkLocationSetting(LocationSettingsRequest.Builder builder) {
SettingsClient client = LocationServices.getSettingsClient(this);
Task<LocationSettingsResponse> task = client.checkLocationSettings(builder.build());
task.addOnSuccessListener(this, new OnSuccessListener<LocationSettingsResponse>() {
#Override
public void onSuccess(LocationSettingsResponse locationSettingsResponse) {
// All location settings are satisfied. The client can initialize
// location requests here.
// ...
startLocationUpdates();
return;
}
});
task.addOnFailureListener(this, new OnFailureListener() {
#Override
public void onFailure(#NonNull final Exception e) {
if (e instanceof ResolvableApiException) {
// Location settings are not satisfied, but this can be fixed
AlertDialog.Builder builder1 = new AlertDialog.Builder(mContext);
builder1.setTitle("Continious Location Request");
builder1.setMessage("This request is essential to get location update continiously");
builder1.create();
builder1.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
ResolvableApiException resolvable = (ResolvableApiException) e;
try {
resolvable.startResolutionForResult(MainHomeActivity.this,
REQUEST_CHECK_SETTINGS);
} catch (IntentSender.SendIntentException e1) {
e1.printStackTrace();
}
}
});
builder1.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(mContext, "Location update permission not granted", Toast.LENGTH_LONG).show();
}
});
builder1.show();
}
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, #Nullable Intent data) {
if (requestCode == REQUEST_CHECK_SETTINGS) {
if (resultCode == RESULT_OK) {
// All location settings are satisfied. The client can initialize
// location requests here.
startLocationUpdates();
}
else {
checkLocationSetting(builder);
}
}
}
now atlast define startLocationUpdates and stopLocationUpdates method :
public void startLocationUpdates() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
// TODO: Consider calling
// Activity#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 Activity#requestPermissions for more details.
return;
}
}
fusedLocationClient.requestLocationUpdates(mLocationRequest,
mlocationCallback,
null /* Looper */);
}
private void stopLocationUpdates() {
fusedLocationClient.removeLocationUpdates(mlocationCallback);
}
Note : Replace context with your class context and call stopLocationUpdates() inside onDestroy method of your class
Note : For any futher information or doubt you can refer to :
https://developer.android.com/training/location/retrieve-current
https://developer.android.com/training/location/change-location-settings
https://developer.android.com/training/location/receive-location-updates
You will get your location in Logcat.
Hope this will hope you or somebody else !

I believe rather than reinventing the wheel, you can use one of the third party libraries that are easy to implement and in this case, battery efficient. One of the library I found is SmartLocation. You can add the following dependency in your build.gradle (app) to start using the library.
compile 'io.nlopez.smartlocation:library:3.2.9'
After adding the dependency, you should rebuild the project to get the references.
As an example you can try the following code in your Activity.
Button start_btn=(Button)findViewById(R.id.start_location_streaming);
Context context = start_btn.getContext();
Handler handler = new Handler();
start_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
SmartLocation.with(context).location().start(locationListener);
}
});
OnLocationUpdatedListener locationListener = new OnLocationUpdatedListener({
#Override
public void onLocationUpdated(Location location) {
double lat = location.getLatitude();
double lng = location.getLongitude();
handler.postDelayed(locationRunnable,8000);
}
});
Runnable locationRunnable = new Runnable({
#Override
public void run() {
SmartLocation.with(context).location().start(locationListener);
}
});
You can stop location tracking in onStop() method
#Override
public void onStop() {
SmartLocation.with(context).location().stop();
super.onStop();
}
SmartLocation library will give you more than what is expected, just try that once.
Note: Make sure your application does have ACCESS_FINE_LOCATION and ACCESS_COARSE_LOCATION (both) to have accurate results. Don't forget to ask for permissions at runtime for Android 6.0 and above.

You should use android services, rather than the app itself. This way you will achieve to run code continuously in the background and you will receive the location even if the app closes.
https://www.tutorialspoint.com/android/android_services.htm

Run time permission not working access fine location Marshmallow

I am working on project where i need to access user's gps location. Due to android 6, I need run time permissions. I tried to do it , first time it asked for gps location on activity starts, but without giving me location. I am still not getting any location coordinates. Hope someone can help ?
public class benzinpriser_akt extends AppCompatActivity implements OnItemClickListener {
public static final int MY_PERMISSION_REQUEST_GPS_LOCATION = 1 ;
LocationManager locationManager;
LocationListener locationListener;
Location currentLocation;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
// Called when a new location is found by the network location provider.
currentLocation = location;
System.out.println("Current Location "+ currentLocation );
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
public void onProviderEnabled(String provider) {
}
public void onProviderDisabled(String provider) {
}
};
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
} else {
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSION_REQUEST_GPS_LOCATION);
}
}
// Some other code regarding listview and fetching data from database
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSION_REQUEST_GPS_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
// contacts-related task you need to do.
System.out.println("Permission Granted");
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}

First of all add theese two lines to your build.gradle:
compile 'com.google.android.gms:play-services-maps:8.4.0'
compile 'com.google.android.gms:play-services-location:8.4.0'
Then in your activity you must implement like that :
public class benzinpriser_akt extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,LocationListener, android.location.LocationListener {
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private int UPDATE_INTERVAL = 20000; // 20 sec
private int FASTEST_INTERVAL = 10000; // 10 sec
private int DISPLACEMENT = 50; // get location per 50 meter change
protected final String TAG = "Location Service";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(yourlayout);
//build google api client
buildGoogleApiClient();
} //oncreate end
protected synchronized void buildGoogleApiClient() {
Log.v(TAG, "google client building");
if (GooglePlayServicesUtil.isGooglePlayServicesAvailable(this) == ConnectionResult.SUCCESS) {
mGoogleApiClient = new GoogleApiClient.Builder(thisService)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
if (!mGoogleApiClient.isConnected() || !mGoogleApiClient.isConnecting()) {
mGoogleApiClient.connect();
}
startListenLocation();
} else {
Log.e(TAG, "unable to connect to google play services.");
}
}
public void createLocationRequestWithDialog(final Activity activity){
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
LocationSettingsRequest.Builder builder = new LocationSettingsRequest.Builder()
.addLocationRequest(mLocationRequest);
//**************************
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(
activity, 1000);
} 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;
}
}
});
}
public void checkGpsPermission(Activity activity) {
if (ContextCompat.checkSelfPermission(activity, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(activity,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
PERMISSION_ACCESS_GPS);
}
else
{
createLocationRequestWithDialog(activity);
}
}
protected void startListenLocation() {
if (ActivityCompat.checkSelfPermission(thisService, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
//no permission , create a notification and want permission
NotificationManager notificationManager = (NotificationManager)
getSystemService(NOTIFICATION_SERVICE);
Notification n = new Notification.Builder(thisService)
.setContentTitle(" notification")
.setContentText("there is no permission about using gps services, please give location permissions")
.setSmallIcon(R.drawable.logo)
.setAutoCancel(true)
.build();
notificationManager.notify((int)System.currentTimeMillis(), n);
} else {
// permission has been granted, continue as usual
if(mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
}
#Override
public void onConnected(#Nullable Bundle bundle) {
if (mGoogleApiClient.isConnected() && mLastLocation != null) {
createLocationRequestWithDialog();
startListenLocation();
}
}
#Override
public void onConnectionSuspended(int i) {
mGoogleApiClient.connect();
}
//TODO add other override methods , onresume, onproviderenabled etc...
}//class end
Battery drain :
/*
Priority update interval Battery drain per hour (%) Accuracy
HIGH_ACCURACY 5 seconds 7.25% ~10 meters
BALANCED_POWER 20 seconds 0.6% ~40 meters
NO_POWER N/A small ~1 mile
*/