Java tutorial
//package com.java2s; /* Copyright (C) 2016-2017 Carsten Pfeiffer This file is part of Gadgetbridge. Gadgetbridge is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Gadgetbridge is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ import android.content.BroadcastReceiver; import android.content.Context; import android.support.v4.content.LocalBroadcastManager; public class Main { /** * Unregisters the given receiver from the given context. * @param context the context from which to unregister * @param receiver the receiver to unregister * @return true if it was successfully unregistered, or false if the receiver was not registered */ public static boolean safeUnregisterBroadcastReceiver(Context context, BroadcastReceiver receiver) { try { context.unregisterReceiver(receiver); return true; } catch (IllegalArgumentException ex) { return false; } } /** * Unregisters the given receiver from the given {@link LocalBroadcastManager}. * @param manager the manager from which to unregister * @param receiver the receiver to unregister * @return true if it was successfully unregistered, or false if the receiver was not registered */ public static boolean safeUnregisterBroadcastReceiver(LocalBroadcastManager manager, BroadcastReceiver receiver) { try { manager.unregisterReceiver(receiver); return true; } catch (IllegalArgumentException ex) { return false; } } }