Java tutorial
//package com.java2s; /* * Copyright 2014 Vincent Brison. * * 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.content.Context; public class Main { private static Context mContext = null; /** * Return the context use by the library. * @return the context use by the library. */ protected static Context getContext() { if (mContext == null) { throw new IllegalStateException("The context provided to this library is null. Please provide" + " a proper context according the lifecycle of the application (you should provide the application context)."); } return mContext; } }