Java tutorial
//package com.java2s; /* * Copyright (c) 2015 PocketHub * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.text.TextUtils; import java.io.IOException; public class Main { /** * Is the given {@link Exception} due to a 401 Unauthorized API response? * * @param e * @return true if 401, false otherwise */ public static boolean isUnauthorized(final Exception e) { String message = null; if (e instanceof IOException) message = e.getMessage(); final Throwable cause = e.getCause(); if (cause instanceof IOException) { String causeMessage = cause.getMessage(); if (!TextUtils.isEmpty(causeMessage)) message = causeMessage; } if (TextUtils.isEmpty(message)) return false; if ("Received authentication challenge is null".equals(message)) return true; return "No authentication challenges found".equals(message); } }