I have made a simple sample of the FusedLocationProviderClient according to this: https://developer.android.com/training/location/request-updates#java
The issue is that I get a location every now and then (waaaay above an interval of 4000ms) and the accuracy is 2000 meters. I need a more precise location and more often. I get the feeling that the location client is not set up properly but at the same time, when using the locationmanager I also get a slow update rate on gps when using the gps provider, network provider also gives me an accuracy of 2000 meters.
Here is my code:
public class MainActivity extends Activity implements ActivityCompat.OnRequestPermissionsResultCallback {
Context context;
private LocationCallback locationCallback;
private FusedLocationProviderClient fusedLocationClient;
private LocationRequest locationRequest;
#Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
locationRequest = new LocationRequest();
locationRequest.setFastestInterval(2000);
locationRequest.setInterval(4000);
locationRequest.setMaxWaitTime(5000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
fusedLocationClient = new FusedLocationProviderClient(this);
locationCallback = new LocationCallback() {
#Override
public void onLocationResult(#NonNull LocationResult locationResult) {
for (Location location : locationResult.getLocations()) {
Log.e("Got location from provider " + location.getProvider(), location.getLatitude() + ", " + location.getLongitude());
Log.e("getAccuracy", String.valueOf(location.getAccuracy()));
}
}
#Override
public void onLocationAvailability(#NonNull LocationAvailability locationAvailability) {
super.onLocationAvailability(locationAvailability);
Log.e("asdf", "available");
}
};
}
private void startLocationUpdates() {
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
String[] PERMISSIONS = {android.Manifest.permission.ACCESS_COARSE_LOCATION, android.Manifest.permission.ACCESS_FINE_LOCATION};
ActivityCompat.requestPermissions(this, PERMISSIONS, 112);
return;
}
fusedLocationClient.requestLocationUpdates(locationRequest,
locationCallback,
Looper.getMainLooper());
}
private void stopLocationUpdates() {
fusedLocationClient.removeLocationUpdates(locationCallback);
}
#Override
public void onRequestPermissionsResult(int i, #NonNull String[] strings, #NonNull int[] ints) {
Intent intent = getIntent();
finish();
startActivity(intent);
}
#Override
protected void onResume() {
super.onResume();
startLocationUpdates();
}
public void onPause() {
super.onPause();
stopLocationUpdates();
}
}
How can I resolve this?
I am trying to add a marker on my Google maps by long-pressing on the location and displaying the name of the location, however, whenever I long-press the marker appears for a split second and then goes away (disappears).
I understand after the long-press the marker is supposed to stay and then show the title as well, but that is not working.
Please do let me know if anyone is facing any such issue and can help me with it.
public class MapsActivity extends FragmentActivity implements OnMapReadyCallback, GoogleMap.OnMapLongClickListener {
private GoogleMap mMap;
LocationManager locationManager;
LocationListener locationListener;
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (grantResults.length>0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)==PackageManager.PERMISSION_GRANTED){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
centerMapOnLocation(lastKnownLocation, "Your Location");
}
}
}
public void centerMapOnLocation(Location location, String title) {
LatLng userLocation = new LatLng(location.getLatitude(), location.getLongitude());
mMap.clear();
if (title != "Your Location"){
mMap.addMarker(new MarkerOptions().position(userLocation).title(title));
}
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(userLocation, 10));
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
// 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);
}
/**
* Manipulates the map once available.
* This callback is triggered when the map is ready to be used.
* This is where we can add markers or lines, add listeners or move the camera. In this case,
* we just add a marker near Sydney, Australia.
* If Google Play services is not installed on the device, the user will be prompted to install
* it inside the SupportMapFragment. This method will only be triggered once the user has
* installed Google Play services and returned to the app.
*/
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
mMap.setOnMapLongClickListener(this);
Intent intent = getIntent();
if (intent.getIntExtra("placeNumber", 0) == 0) {
//zoom in on the user's location
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
centerMapOnLocation(location, "Your Location");
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
}
};
if (Build.VERSION.SDK_INT < 23) {
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;
}
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
} else {
if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)==PackageManager.PERMISSION_GRANTED){
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
Location lastKnownLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
centerMapOnLocation(lastKnownLocation, "Your Location");
} else {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION},1);
}
}
}
}
#Override
public void onMapLongClick(LatLng latLng) {
Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
String address ="";
try {
List <Address> listAddresses= geocoder.getFromLocation(latLng.latitude,latLng.longitude,1);
if (listAddresses!=null&& listAddresses.size()>0){
if (listAddresses.get(0).getThoroughfare()!=null){
if (listAddresses.get(0).getSubThoroughfare()!=null){
address+=listAddresses.get(0).getSubThoroughfare()+" ";
}
address+= listAddresses.get(0).getThoroughfare();
}
}
} catch (IOException e) {
e.printStackTrace();
}
if (address == ""){
SimpleDateFormat sdf = new SimpleDateFormat("mm:HH yyyyMMdd", Locale.getDefault());
address = sdf.format(new Date());
}
mMap.addMarker(new MarkerOptions().position(latLng).title(address).icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)));
}
}
You are clearing your map every time your location changes here:
#Override
public void onLocationChanged(Location location) {
centerMapOnLocation(location, "Your Location");
}
That's why your marker disappears right after you add it to the map. If you remove or comment out this line within your centerMapOnLocation method:
mMap.clear();
Then the markers no longer disappear.
Hope this helps!
i am trying to develop a speedometer app for testing purposes i have already written the code that will get the speed but i am not sure if it is the real time speed because sometimes i see that there's some delay, this is my code:
public class MainActivity extends AppCompatActivity {
LocationManager locationManager;
LocationListener locationListener;
public void startListening() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
if (locationManager != null) {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
}
}
}
public void updateLocationInfo(Location location){
TextView speedtextView = (TextView) findViewById(R.id.speedTextView);
speedtextView.setText("Current speed: " + location.getSpeed()*3600/1000);
}
#Override
public void onRequestPermissionsResult(int requestCode, #NonNull String[] permissions, #NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == 1) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
startListening();
}
}}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
locationListener = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
updateLocationInfo(location);
}
#Override
public void onStatusChanged(String s, int i, Bundle bundle) {
}
#Override
public void onProviderEnabled(String s) {
}
#Override
public void onProviderDisabled(String s) {
}
};
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 1);
} else {
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListener);
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location != null) {
updateLocationInfo(location);
}
}
}
}
do i have to do anything else? is there any special way to get the real time speed? because i have used a lot of apps that gets the real time speed and right now i am wondering how did they do it? could it possibly be the "fair" GPS connection? or am i doing it wrong?
I have an issue, I need to get the latitude and longitude of one specific moment like taking a picture. I get the Double values, the problem is that they're always 0. I receive no exceptions, and the coordinates are uploaded successfully to Firebase Database, but when I check them in the JSON, they are always zero (I took like 20 pictures).
This is my sections code of "location" stuffs and the uploading to Firebase Database.
My Main Activity is like this.
public class MainActivity extends AppCompatActivity implements LocationListener
Global variables related to Location
double latitude;
double longitude;
This goes inside onCreate():
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
String networkProvider = LocationManager.NETWORK_PROVIDER;
String gpsProvider = LocationManager.GPS_PROVIDER;
final Location location= new Location(networkProvider);
onLocationChanged(location);{
latitude=location.getLatitude();
longitude=location.getLongitude();
}
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
locationManager.requestLocationUpdates(gpsProvider, 5000, 10, this);
This goes in a button onClickListener(), also inside onCreate() method.
//Insert coordinates to JSON Firebase database...
Coordinates coordinates = new Coordinates();
coordinates.setLatitude(location.getLatitude());
coordinates.setLongitude(location.getLongitude());
testReference.push().setValue(coordinates);
Toast.makeText(MainActivity.this, "Coordinates uploaded!", Toast.LENGTH_LONG).show();
Also I have these methods inside MainActivity:
#Override
public void onLocationChanged(Location location) {
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
#Override
public void onProviderEnabled(String provider) {
}
#Override
public void onProviderDisabled(String provider) {
}
Try this:
locationManager = (LocationManager) getApplicationContext()
.getSystemService(Context.LOCATION_SERVICE);
Criteria locationCritera = new Criteria();
String providerName = locationManager.getBestProvider(locationCritera,
true);
if(providerName!=null)
location = locationManager.getLastKnownLocation(providerName);
locationListener = new MyLocationListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0,
0, locationListener);
and Implement Your Location Listener class:
private class MyLocationListener implements LocationListener {
public void onLocationChanged(Location loc) {
if (loc != null) {
location = loc;
latitude=location.getLatitude();
longitude=location.getLongitude();
}
}
public void onProviderDisabled(String provider) {
}
public void onProviderEnabled(String provider) {
}
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}
check null value for getLastKnownLocation() method..
How do I get the current Latitude and Longitude of the mobile device in android using location tools?
Use the LocationManager.
LocationManager lm = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
Location location = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
double longitude = location.getLongitude();
double latitude = location.getLatitude();
The call to getLastKnownLocation() doesn't block - which means it will return null if no position is currently available - so you probably want to have a look at passing a LocationListener to the requestLocationUpdates() method instead, which will give you asynchronous updates of your location.
private final LocationListener locationListener = new LocationListener() {
public void onLocationChanged(Location location) {
longitude = location.getLongitude();
latitude = location.getLatitude();
}
}
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 2000, 10, locationListener);
You'll need to give your application the ACCESS_FINE_LOCATION permission if you want to use GPS.
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
You may also want to add the ACCESS_COARSE_LOCATION permission for when GPS isn't available and select your location provider with the getBestProvider() method.
Here is the class LocationFinder to find the GPS location. This class will call MyLocation, which will do the business.
LocationFinder
public class LocationFinder extends Activity {
int increment = 4;
MyLocation myLocation = new MyLocation();
// private ProgressDialog dialog;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.intermediat);
myLocation.getLocation(getApplicationContext(), locationResult);
boolean r = myLocation.getLocation(getApplicationContext(),
locationResult);
startActivity(new Intent(LocationFinder.this,
// Nearbyhotelfinder.class));
GPSMyListView.class));
finish();
}
public LocationResult locationResult = new LocationResult() {
#Override
public void gotLocation(Location location) {
// TODO Auto-generated method stub
double Longitude = location.getLongitude();
double Latitude = location.getLatitude();
Toast.makeText(getApplicationContext(), "Got Location",
Toast.LENGTH_LONG).show();
try {
SharedPreferences locationpref = getApplication()
.getSharedPreferences("location", MODE_WORLD_READABLE);
SharedPreferences.Editor prefsEditor = locationpref.edit();
prefsEditor.putString("Longitude", Longitude + "");
prefsEditor.putString("Latitude", Latitude + "");
prefsEditor.commit();
System.out.println("SHARE PREFERENCE ME PUT KAR DIYA.");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
// handler for the background updating
}
MyLocation
public class MyLocation {
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled=false;
boolean network_enabled=false;
public boolean getLocation(Context context, LocationResult result)
{
//I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult=result;
if(lm==null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){}
try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){}
//Toast.makeText(context, gps_enabled+" "+network_enabled, Toast.LENGTH_LONG).show();
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled)
return false;
if(gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
if(network_enabled)
lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 10000);
// Toast.makeText(context, " Yaha Tak AAya", Toast.LENGTH_LONG).show();
return true;
}
LocationListener locationListenerGps = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerNetwork);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
LocationListener locationListenerNetwork = new LocationListener() {
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
lm.removeUpdates(locationListenerGps);
}
public void onProviderDisabled(String provider) {}
public void onProviderEnabled(String provider) {}
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
class GetLastLocation extends TimerTask {
#Override
public void run() {
//Context context = getClass().getgetApplicationContext();
Location net_loc=null, gps_loc=null;
if(gps_enabled)
gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if(network_enabled)
net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null && net_loc!=null){
if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
else
locationResult.gotLocation(net_loc);
return;
}
if(gps_loc!=null){
locationResult.gotLocation(gps_loc);
return;
}
if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}
locationResult.gotLocation(null);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}
With google things changes very often: non of the previous answers worked for me.
based on this google training here is how you do it using
fused location provider
this requires Set Up Google Play Services
Activity class
public class GPSTrackerActivity extends AppCompatActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
Location mLastLocation;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
}
protected void onStart() {
mGoogleApiClient.connect();
super.onStart();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
#Override
public void onConnected(Bundle bundle) {
try {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(
mGoogleApiClient);
if (mLastLocation != null) {
Intent intent = new Intent();
intent.putExtra("Longitude", mLastLocation.getLongitude());
intent.putExtra("Latitude", mLastLocation.getLatitude());
setResult(1,intent);
finish();
}
} catch (SecurityException e) {
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
usage
in you activity
Intent intent = new Intent(context, GPSTrackerActivity.class);
startActivityForResult(intent,1);
And this method
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == 1){
Bundle extras = data.getExtras();
Double longitude = extras.getDouble("Longitude");
Double latitude = extras.getDouble("Latitude");
}
}
you can got Current latlng using this
`
public class MainActivity extends ActionBarActivity {
private LocationManager locationManager;
private String provider;
private MyLocationListener mylistener;
private Criteria criteria;
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// Define the criteria how to select the location provider
criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_COARSE); //default
// user defines the criteria
criteria.setCostAllowed(false);
// get the best provider depending on the criteria
provider = locationManager.getBestProvider(criteria, false);
// the last known location of this provider
Location location = locationManager.getLastKnownLocation(provider);
mylistener = new MyLocationListener();
if (location != null) {
mylistener.onLocationChanged(location);
} else {
// leads to the settings because there is no last known location
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
// location updates: at least 1 meter and 200millsecs change
locationManager.requestLocationUpdates(provider, 200, 1, mylistener);
String a=""+location.getLatitude();
Toast.makeText(getApplicationContext(), a, 222).show();
}
private class MyLocationListener implements LocationListener {
#Override
public void onLocationChanged(Location location) {
// Initialize the location fields
Toast.makeText(MainActivity.this, ""+location.getLatitude()+location.getLongitude(),
Toast.LENGTH_SHORT).show()
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Toast.makeText(MainActivity.this, provider + "'s status changed to "+status +"!",
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderEnabled(String provider) {
Toast.makeText(MainActivity.this, "Provider " + provider + " enabled!",
Toast.LENGTH_SHORT).show();
}
#Override
public void onProviderDisabled(String provider) {
Toast.makeText(MainActivity.this, "Provider " + provider + " disabled!",
Toast.LENGTH_SHORT).show();
}
}
`
Above solutions is also correct, but some time if location is null then it crash the app or not working properly. The best way to get Latitude and Longitude of android is:
Geocoder geocoder;
String bestProvider;
List<Address> user = null;
double lat;
double lng;
LocationManager lm = (LocationManager) activity.getSystemService(Context.LOCATION_SERVICE);
Criteria criteria = new Criteria();
bestProvider = lm.getBestProvider(criteria, false);
Location location = lm.getLastKnownLocation(bestProvider);
if (location == null){
Toast.makeText(activity,"Location Not found",Toast.LENGTH_LONG).show();
}else{
geocoder = new Geocoder(activity);
try {
user = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
lat=(double)user.get(0).getLatitude();
lng=(double)user.get(0).getLongitude();
System.out.println(" DDD lat: " +lat+", longitude: "+lng);
}catch (Exception e) {
e.printStackTrace();
}
}
Best way is
Add permission manifest file
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
Then you can get GPS location or if GPS location is not available then this function return NETWORK location
public static Location getLocationWithCheckNetworkAndGPS(Context mContext) {
LocationManager lm = (LocationManager)
mContext.getSystemService(Context.LOCATION_SERVICE);
assert lm != null;
isGpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
isNetworkLocationEnabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);
Location networkLoacation = null, gpsLocation = null, finalLoc = null;
if (isGpsEnabled)
if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(mContext, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return null;
}gpsLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (isNetworkLocationEnabled)
networkLoacation = lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
if (gpsLocation != null && networkLoacation != null) {
//smaller the number more accurate result will
if (gpsLocation.getAccuracy() > networkLoacation.getAccuracy())
return finalLoc = networkLoacation;
else
return finalLoc = gpsLocation;
} else {
if (gpsLocation != null) {
return finalLoc = gpsLocation;
} else if (networkLoacation != null) {
return finalLoc = networkLoacation;
}
}
return finalLoc;
}
You can use FusedLocationProvider
For using Fused Location Provider in your project you will have to add the google play services location dependency in our app level build.gradle file
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
...
...
...
implementation 'com.google.android.gms:play-services-location:17.0.0'
}
Permissions in Manifest
Apps that use location services must request location permissions. Android offers two location permissions: ACCESS_COARSE_LOCATION and ACCESS_FINE_LOCATION.
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
As you may know that from Android 6.0 (Marshmallow) you must request permissions for important access in the runtime. Cause it’s a security issue where while installing an application, user may not clearly understand about an important permission of their device.
ActivityCompat.requestPermissions(
this,
arrayOf(Manifest.permission.ACCESS_COARSE_LOCATION, Manifest.permission.ACCESS_FINE_LOCATION),
PERMISSION_ID
)
Then you can use the FusedLocationProvider Client to get the updated location in your desired place.
mFusedLocationClient.lastLocation.addOnCompleteListener(this) { task ->
var location: Location? = task.result
if (location == null) {
requestNewLocationData()
} else {
findViewById<TextView>(R.id.latTextView).text = location.latitude.toString()
findViewById<TextView>(R.id.lonTextView).text = location.longitude.toString()
}
}
You can also check certain configuration like if the device has location settings on or not. You can also check the article on Detect Current Latitude & Longitude using Kotlin in Android for more functionality.
If there is no cache location then it will catch the current location using:
private fun requestNewLocationData() {
var mLocationRequest = LocationRequest()
mLocationRequest.priority = LocationRequest.PRIORITY_HIGH_ACCURACY
mLocationRequest.interval = 0
mLocationRequest.fastestInterval = 0
mLocationRequest.numUpdates = 1
mFusedLocationClient = LocationServices.getFusedLocationProviderClient(this)
mFusedLocationClient!!.requestLocationUpdates(
mLocationRequest, mLocationCallback,
Looper.myLooper()
)
}
Plug and play location-manager that can be used both in XML-based projects and Jetpack Compose projects (personally using it in JetpackCompose)
class LocationManager(context: Context): LocationCallback() {
val context = context
var publicCompletion: ((Double, Double) -> Unit)? = null
var fusedLocationProviderClient = FusedLocationProviderClient(
context
)
fun requestLocationPermission() {
val activity = context as Activity?
ActivityCompat.requestPermissions(
activity!!,
arrayOf(
Manifest.permission.ACCESS_FINE_LOCATION
),
101
)
}
fun checkIfLocationPermissionIsGranted(): Boolean {
return (ActivityCompat.checkSelfPermission(
context,
Manifest.permission.ACCESS_FINE_LOCATION
) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(
context,
Manifest.permission.ACCESS_COARSE_LOCATION
) != PackageManager.PERMISSION_GRANTED
)
}
fun getLatitudeLongitude(completion: (Double, Double) -> Unit) {
publicCompletion = { latitude, longitude ->
completion(latitude, longitude)
}
if (ActivityCompat.checkSelfPermission(
context,
Manifest.permission.ACCESS_FINE_LOCATION
) == PackageManager.PERMISSION_GRANTED
) {
val activity = context as Activity?
fusedLocationProviderClient.lastLocation.addOnCompleteListener(activity!!) { task ->
var location: Location? = task.result
if (location != null) {
publicCompletion?.let { it(location!!.latitude, location!!.longitude) }
} else {
requestLocationUpdates()
}
}
}
}
fun requestLocationUpdates() {
var request = LocationRequest()
request.priority = com.google.android.gms.location.LocationRequest.PRIORITY_HIGH_ACCURACY
request.fastestInterval = 0
request.numUpdates = 1
if (ActivityCompat.checkSelfPermission(
context,
Manifest.permission.ACCESS_FINE_LOCATION
) == PackageManager.PERMISSION_GRANTED
) {
fusedLocationProviderClient.requestLocationUpdates(
request, this, Looper.myLooper()
)
}
}
override fun onLocationResult(p0: LocationResult?) {
super.onLocationResult(p0)
publicCompletion?.let { it(p0!!.lastLocation!!.latitude, p0!!.lastLocation!!.longitude) }
}
override fun onLocationAvailability(p0: LocationAvailability?) {
super.onLocationAvailability(p0)
}
}
Just follow Google recommendation and prepared codes in kotlin: (Supports also Android 11 and 12):
https://github.com/googlecodelabs/while-in-use-location
and its step by step explanation:
https://codelabs.developers.google.com/codelabs/while-in-use-location