PermissionUtils.java

/**
 * Compat permissions related methods.
 */
public final class PermissionUtils {
    /**
     * Private constructor - avoid class instantiation.
     */
    private PermissionUtils() {
        throw new UnsupportedOperationException();
    }

    /**
     * Asks for the provided permissions. When necessary, informs the user with a message.
     *
     * @param activity    the calling activity.
     * @param request     a request code.
     * @param error       the message resource identifier.
     * @param permissions the checked permissions.
     * @return true when the permission request started, false otherwise.
     */
    public static boolean askForMPermissions(BaseActivity activity, int request, @StringRes int error,
                                             String... permissions) {
        if (activity.isMarshmallow()) {
            if ((error > 0) && activity.shouldShowRequestPermissionRationale(permissions[0])) {
                UiUtils.toast(activity, activity.getString(error));
            }

            ActivityCompat.requestPermissions(activity, permissions, request);
            return true;
        }

        return false;
    }

    /**
     * Checks whether the provided permissions were granted or not.
     *
     * @param activity    the calling activity.
     * @param permissions the checked permissions.
     * @return true when all the permissions were granted, false otherwise.
     */
    public static boolean hasPermission(Activity activity, String... permissions) {
        boolean hasPermissions = true;

        for (String permission : permissions) {
            hasPermissions &= ContextCompat.checkSelfPermission(activity, permission)
                    == PackageManager.PERMISSION_GRANTED;
        }

        return hasPermissions;
    }
}