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 17package android.support.design.internal; 18 19import android.content.Context; 20import android.support.annotation.RestrictTo; 21import android.support.v7.view.menu.MenuBuilder; 22import android.view.MenuItem; 23import android.view.SubMenu; 24 25import static android.support.annotation.RestrictTo.Scope.GROUP_ID; 26 27/** 28 * @hide 29 */ 30@RestrictTo(GROUP_ID) 31public final class BottomNavigationMenu extends MenuBuilder { 32 public static final int MAX_ITEM_COUNT = 5; 33 34 public BottomNavigationMenu(Context context) { 35 super(context); 36 } 37 38 @Override 39 public SubMenu addSubMenu(int group, int id, int categoryOrder, CharSequence title) { 40 throw new UnsupportedOperationException("BottomNavigationView does not support submenus"); 41 } 42 43 @Override 44 protected MenuItem addInternal(int group, int id, int categoryOrder, CharSequence title) { 45 if (size() + 1 > MAX_ITEM_COUNT) { 46 throw new IllegalArgumentException( 47 "Maximum number of items supported by BottomNavigationView is " + MAX_ITEM_COUNT 48 + ". Limit can be checked with BottomNavigationView#getMaxItemCount()"); 49 } 50 return super.addInternal(group, id, categoryOrder, title); 51 } 52} 53