Useful methods for requesting permissions on Android 6.0 and above

PermissionUtils.java

public final class PermissionUtils {

    private PermissionUtils() {}

    public static void askPermissionIfNeeded(@NonNull final Activity activity,
                                                @NonNull final View layoutView,
                                                @StringRes final int message,
                                                final int requestCode,
                                                @NonNull final String[] permissions) {
        if (!permissionsGranted(activity, permissions)) {
            if (shouldShowRequestPermissionRationale(activity, permissions)) {
                Snackbar.make(layoutView, message, Snackbar.LENGTH_INDEFINITE)
                        .setAction(android.R.string.ok, view -> {
                            ActivityCompat.requestPermissions(activity, permissions, requestCode);
                        })
                        .show();
            } else {
                // permission has not been granted yet, request it directly.
                ActivityCompat.requestPermissions(activity, permissions, requestCode);
            }
        }
    }

    public static boolean permissionsGranted(@NonNull final Activity activity, @NonNull final String[] permissions) {
        for (final String permission: permissions) {
            if (ActivityCompat.checkSelfPermission(activity, permission) != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }

        return true;
    }

    public static boolean permissionsGranted(@PermissionChecker.PermissionResult final int... grantResults) {
        if(grantResults.length < 1){
            return false;
        }

        for (final int result : grantResults) {
            if (result != PackageManager.PERMISSION_GRANTED) {
                return false;
            }
        }
        return true;
    }

    private static boolean shouldShowRequestPermissionRationale(final Activity activity, @NonNull final String[] permissions) {
        for (final String permission: permissions) {
            if (!ActivityCompat.shouldShowRequestPermissionRationale(activity, permission)) {
                return false;
            }
        }

        return true;
    }
}