Permissions utilities

public class PermissionsUtil {

    public interface IPermissionResult{

        void grantedPermissions(String[] permission);

    }

    public static boolean isPermissionGranted(Context context, String permission){

        return ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED;

    }

    public static void requestPermissions(Context context, int requestCodeOfPermission, String...  permissions) {

        ActivityCompat.requestPermissions((Activity) context, permissions, requestCodeOfPermission);

    }

    public static void onRequestPermissionsResult(

            String[] permissions, int[] grantResults, IPermissionResult iPermissionResult){

        List<String> grantedPermissions = new ArrayList<>();

        if (grantResults != null && grantResults.length > 0) {

            for (int i = 0; i < grantResults.length; i++) {

                if(grantResults[i] == PackageManager.PERMISSION_GRANTED)

                    grantedPermissions.add(permissions[i]);

            }

            iPermissionResult.grantedPermissions(grantedPermissions.toArray(new String[grantedPermissions.size()]));

        }

    }

    public static boolean isPermissionExists(String[] permissions, String permission) {

        return Arrays.asList(permissions).contains(permission);

    }

}

@Override

public void onMapReady(GoogleMap googleMap) {

    mGoogleMap = googleMap;

    if(!PermissionsUtil.isPermissionGranted(this, Manifest.permission.ACCESS_FINE_LOCATION)

            || !PermissionsUtil.isPermissionGranted(this, Manifest.permission.ACCESS_COARSE_LOCATION)) {

        PermissionsUtil.requestPermissions(this, REQUEST_CODE_FOR_PERMISSION_LOCATION,

                Manifest.permission.ACCESS_FINE_LOCATION,

                Manifest.permission.ACCESS_COARSE_LOCATION);

    }else {

        setupMap();

    }

}

@Override

public void onRequestPermissionsResult(int requestCode, @NonNull final String[] permissions, @NonNull int[] grantResults) {

    super.onRequestPermissionsResult(requestCode, permissions, grantResults);

    if (requestCode == REQUEST_CODE_FOR_PERMISSION_LOCATION) {

        PermissionsUtil.onRequestPermissionsResult(permissions, grantResults, new PermissionsUtil.IPermissionResult() {

            @Override

            public void grantedPermissions(String[] permission) {

                if (PermissionsUtil.isPermissionExists(permission, Manifest.permission.ACCESS_FINE_LOCATION)

                        || PermissionsUtil.isPermissionExists(permission, Manifest.permission.ACCESS_COARSE_LOCATION)) {

                    setupMap();

                }

            }

        });

    }

}