hi everyone i'm trying to get the user's location, but when i ask for permissions google maps doesn't load. Specifically I have this error:
2022-07-03 12:46:39.032 12031-12031/com.example.progetto E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.progetto, PID: 12031
java.lang.SecurityException: my location requires permission ACCESS_FINE_LOCATION or ACCESS_COARSE_LOCATION
at com.google.maps.api.android.lib6.impl.bj.J(:com.google.android.gms.dynamite_mapsdynamite@[email protected] (100700-0):10)
at com.google.android.gms.maps.internal.i.ba(:com.google.android.gms.dynamite_mapsdynamite@[email protected] (100700-0):172)
at et.onTransact(:com.google.android.gms.dynamite_mapsdynamite@[email protected] (100700-0):4)
at android.os.Binder.transact(Binder.java:914)
at com.google.android.gms.internal.maps.zza.zzc(com.google.android.gms:play-services-maps@@18.0.0:2)
at com.google.android.gms.maps.internal.zzg.setMyLocationEnabled(com.google.android.gms:play-services-maps@@18.0.0:3)
at com.google.android.gms.maps.GoogleMap.setMyLocationEnabled(com.google.android.gms:play-services-maps@@18.0.0:1)
at com.example.progetto.MapsLine.onMapReady(MapsLine.java:207)
at com.google.android.gms.maps.zzat.zzb(com.google.android.gms:play-services-maps@@18.0.0:1)
at com.google.android.gms.maps.internal.zzaq.zza(com.google.android.gms:play-services-maps@@18.0.0:5)
at com.google.android.gms.internal.maps.zzb.onTransact(com.google.android.gms:play-services-maps@@18.0.0:3)
at android.os.Binder.transact(Binder.java:914)
at es.bc(:com.google.android.gms.dynamite_mapsdynamite@[email protected] (100700-0):2)
at com.google.maps.api.android.lib6.impl.bf.run(:com.google.android.gms.dynamite_mapsdynamite@[email protected] (100700-0):1)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7356)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
My code is:
public class MapsLine extends Fragment implements OnMapReadyCallback {
private static final int MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION = 0;
private FusedLocationProviderClient fusedLocationClient;
private LocationCallback locationCallback;
private boolean requestingLocationUpdates = true;
GoogleMap gMap;
double latitude;
double longitude;
@Override
public View onCreateView(@NonNull @NotNull LayoutInflater inflater, @Nullable @org.jetbrains.annotations.Nullable ViewGroup container, @Nullable @org.jetbrains.annotations.Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_maps_line, container, false);
}
@Override
public void onViewCreated(@NonNull View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
SupportMapFragment supportMapFragment = (SupportMapFragment)
getChildFragmentManager().findFragmentById(R.id.map);
supportMapFragment.getMapAsync(this);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d("MainActivity", "onCreate");
fusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());
//callback per gli aggiornamenti di posizione
locationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
if (locationResult == null) {
Log.d("main_activiyt_maps", "location request is null");
return;
}
//aggiorno i dati nelle textView con le informazioni della posizione aggiornata
for (Location location : locationResult.getLocations()) {
Log.d("Location", "New Location received: " location.toString());
latitude = location.getLatitude();
longitude=location.getLongitude();
Log.d("main_activiyt_maps", String.valueOf(latitude));
Log.d("main_activiyt_maps", String.valueOf(longitude));
}
}
};
}
@Override
public void onPause() {
super.onPause();
fusedLocationClient.removeLocationUpdates(locationCallback);
requestingLocationUpdates = false;
}
@Override
public void onResume() {
super.onResume();
Log.d("MainActivity", "onResume");
if (checkLocationPermission()) {
Log.d("MainActivity", "Permessi OK");
//richiedo l'ultima posizione
//richiedo aggiornamenti sulla posizione
startLocationUpdates();
}
}
public boolean checkLocationPermission() {
if (ContextCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
//ho i permessi, scrivo nella casella di testo che va tutto bene
Log.d("Location", "The permission is granted");
return true;
} else {
//non ho i permessi, devo richiederli
Log.d("Location", "Ask for permission");
ActivityCompat.requestPermissions(getActivity(), new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION);
return false;
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
switch (requestCode) {
case MY_PERMISSION_REQUEST_ACCESS_FINE_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted
Log.d("Location", "Now the permission is granted");
fusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity());
} else {
// permission was not granted
Log.d("Location", "Permission still not granted");
}
break;
}
}
}
public void getLastKnownLocation() {
if (checkLocationPermission()) {
fusedLocationClient.getLastLocation()
.addOnSuccessListener(getActivity(), new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
// Got last known location. In some rare situations this can be null.
if (location != null) {
Log.d("Location", "Last known location:" location.toString());
} else {
Log.d("Location", "Last Known location not available");
}
}
});
}
}
//per chiedere la posizione aggiornata
private void startLocationUpdates() {
if (checkLocationPermission()) {
requestingLocationUpdates = true;
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setInterval(1000); //in ms.
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, Looper.getMainLooper());
}
}
@SuppressLint("MissingPermission")
@Override
public void onMapReady(@NonNull GoogleMap googleMap) {
gMap = googleMap;
gMap.setMyLocationEnabled(true);
// Add a marker in Sydney and move the camera
LatLng sydney = new LatLng(latitude,longitude);
gMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
gMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
gMap.clear(); //clear old markers
}
}
My themanifest code is:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="my_key" ></meta-data>
in the manifest I have ACCESS_COARSE_LOCATION and ACCESS_FINE_LOCATION and in the code I check the permissions(checkLocationPermission()). why does it crash at the first start, when the app asks me for permissions?
CodePudding user response：
In onViewCreated(), you are setting up your SupportMapFragment. In onMapReady(), you are trying to use location information via gMap.setMyLocationEnabled(true);. Do not call setMyLocationEnabled() until the user grants you permission.