I have been working in an Application where i need to fetch the current location of users. For the same, I added the COARSE_LOCATION AND FINE_LOCATION permissions in Manifest file.
I also added the Runtime permission to the App and i checked that the permissions are enabled in the App Info.
I have been using the below code to fetch the user's location.
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
String provider = locationManager.getBestProvider(new Criteria(), true);
if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
} else {
Location locations = locationManager.getLastKnownLocation(provider);
List<String> providerList = locationManager.getAllProviders();
if (null != locations && null != providerList && providerList.size() > 0) {
double longitude = locations.getLongitude();
double latitude = locations.getLatitude();
Geocoder geocoder = new Geocoder(getApplicationContext(), Locale.getDefault());
try {
List<Address> listAddresses = geocoder.getFromLocation(latitude, longitude, 1);
if (null != listAddresses && listAddresses.size() > 0) {
cityname = listAddresses.get(0).getLocality();
countryname = listAddresses.get(0).getCountryName();
regionname = listAddresses.get(0).getSubLocality();
System.out.println("Location updates = " + cityname + regionname + countryname);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
This piece of code works good on some devices (REDMI NOTE 3, REDMI NOTE 4, MOTO E) and in some devices it returns null(SAMSUNG J7, MOTO G).
Did i went wrong anywhere? Any advise can be really great full for my project and my learning.
I had the same problem. I put locationManager.getLastKnownLocation(provider);
code inside loop until I get current location latitude and longitude. See below code :
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
Location location = null;
do {
location = getLastKnownLocation();
}
while (location == null);
currentLatitude = location.getLatitude();
currentLongitude = location.getLongitude();
}
private Location getLastKnownLocation() {
List<String> providers = locationManager.getProviders(true);
Location bestLocation = null;
for (String provider : providers) {
Location l = null;
try {
l = locationManager.getLastKnownLocation(provider);
} catch (SecurityException e) {
e.printStackTrace();
}
if (l == null) {
continue;
}
if (bestLocation == null
|| l.getAccuracy() < bestLocation.getAccuracy()) {
bestLocation = l;
}
}
if (bestLocation == null) {
return null;
}
return bestLocation;
}
Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (location == null) {
do{
location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
}while (location == null);
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(getActivity(), message, Toast.LENGTH_LONG).show();
Log.d("locationLinster",message);
}else{
String message = String.format(
"New Location \n Longitude: %1$s \n Latitude: %2$s",
location.getLongitude(), location.getLatitude()
);
Toast.makeText(getActivity(), message, Toast.LENGTH_LONG).show();
Log.d("locationLinster",message);
}
This really help to kick start the Provider... it takes time if our having this problem for the 1st time. But when it kicks in. it works like a dream.
Thanks @RG
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