Util.CheckLocation

 public static void checkWriteLocationPermissionFor23(Context context, int code){
        // Here, thisActivity is the current activity
        if (ContextCompat.checkSelfPermission(context,
                Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {

            // Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale((Activity)context,
                    Manifest.permission.ACCESS_FINE_LOCATION)) {

                // Show an expanation 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.

            } else {

                // No explanation needed, we can request the permission.

                ActivityCompat.requestPermissions((Activity)context,
                        new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                        code);

            }
        }
    }