1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.deskclock.actionbarmenu; 18 19 import android.app.Activity; 20 import android.os.Bundle; 21 import android.view.Menu; 22 import android.view.MenuItem; 23 24 import java.util.ArrayList; 25 import java.util.Collections; 26 import java.util.List; 27 28 /** 29 * Activity scoped singleton that manages action bar menus. Each menu item is controlled by a 30 * {@link MenuItemController} instance. 31 */ 32 public final class OptionsMenuManager { 33 34 private final List<MenuItemController> mControllers = new ArrayList<>(); 35 36 /** 37 * Add one or more {@link MenuItemController} to the actionbar menu. 38 * <p/> 39 * This should be called in {@link Activity#onCreate(Bundle)}. 40 */ addMenuItemController(MenuItemController... controllers)41 public OptionsMenuManager addMenuItemController(MenuItemController... controllers) { 42 Collections.addAll(mControllers, controllers); 43 return this; 44 } 45 46 /** 47 * Inflates {@link Menu} for the activity. 48 * <p/> 49 * This method should be called during {@link Activity#onCreateOptionsMenu(Menu)}. 50 */ onCreateOptionsMenu(Menu menu)51 public void onCreateOptionsMenu(Menu menu) { 52 for (MenuItemController controller : mControllers) { 53 controller.onCreateOptionsItem(menu); 54 } 55 } 56 57 /** 58 * Prepares the popup to displays all required menu items. 59 * <p/> 60 * This method should be called during {@link Activity#onPrepareOptionsMenu(Menu)} (Menu)}. 61 */ onPrepareOptionsMenu(Menu menu)62 public void onPrepareOptionsMenu(Menu menu) { 63 for (MenuItemController controller : mControllers) { 64 final MenuItem menuItem = menu.findItem(controller.getId()); 65 if (menuItem != null) { 66 controller.onPrepareOptionsItem(menuItem); 67 } 68 } 69 } 70 71 /** 72 * Handles click action for a menu item. 73 * <p/> 74 * This method should be called during {@link Activity#onOptionsItemSelected(MenuItem)}. 75 */ onOptionsItemSelected(MenuItem item)76 public boolean onOptionsItemSelected(MenuItem item) { 77 final int itemId = item.getItemId(); 78 for (MenuItemController controller : mControllers) { 79 if (controller.getId() == itemId 80 && controller.onOptionsItemSelected(item)) { 81 return true; 82 } 83 } 84 return false; 85 } 86 } 87