1 /* 2 * Copyright (C) 2015 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 package com.android.internal.view.menu; 17 18 import android.view.LayoutInflater; 19 import android.view.View; 20 import android.view.ViewGroup; 21 import android.widget.BaseAdapter; 22 23 import java.util.ArrayList; 24 25 public class MenuAdapter extends BaseAdapter { 26 MenuBuilder mAdapterMenu; 27 28 private int mExpandedIndex = -1; 29 30 private boolean mForceShowIcon; 31 private final boolean mOverflowOnly; 32 private final LayoutInflater mInflater; 33 private final int mItemLayoutRes; 34 MenuAdapter(MenuBuilder menu, LayoutInflater inflater, boolean overflowOnly, int itemLayoutRes)35 public MenuAdapter(MenuBuilder menu, LayoutInflater inflater, boolean overflowOnly, 36 int itemLayoutRes) { 37 mOverflowOnly = overflowOnly; 38 mInflater = inflater; 39 mAdapterMenu = menu; 40 mItemLayoutRes = itemLayoutRes; 41 findExpandedIndex(); 42 } 43 getForceShowIcon()44 public boolean getForceShowIcon() { 45 return mForceShowIcon; 46 } 47 setForceShowIcon(boolean forceShow)48 public void setForceShowIcon(boolean forceShow) { 49 mForceShowIcon = forceShow; 50 } 51 getCount()52 public int getCount() { 53 ArrayList<MenuItemImpl> items = mOverflowOnly ? 54 mAdapterMenu.getNonActionItems() : mAdapterMenu.getVisibleItems(); 55 if (mExpandedIndex < 0) { 56 return items.size(); 57 } 58 return items.size() - 1; 59 } 60 getAdapterMenu()61 public MenuBuilder getAdapterMenu() { 62 return mAdapterMenu; 63 } 64 getItem(int position)65 public MenuItemImpl getItem(int position) { 66 ArrayList<MenuItemImpl> items = mOverflowOnly ? 67 mAdapterMenu.getNonActionItems() : mAdapterMenu.getVisibleItems(); 68 if (mExpandedIndex >= 0 && position >= mExpandedIndex) { 69 position++; 70 } 71 return items.get(position); 72 } 73 getItemId(int position)74 public long getItemId(int position) { 75 // Since a menu item's ID is optional, we'll use the position as an 76 // ID for the item in the AdapterView 77 return position; 78 } 79 getView(int position, View convertView, ViewGroup parent)80 public View getView(int position, View convertView, ViewGroup parent) { 81 if (convertView == null) { 82 convertView = mInflater.inflate(mItemLayoutRes, parent, false); 83 } 84 85 final int currGroupId = getItem(position).getGroupId(); 86 final int prevGroupId = 87 position - 1 >= 0 ? getItem(position - 1).getGroupId() : currGroupId; 88 // Show a divider if adjacent items are in different groups. 89 ((ListMenuItemView) convertView) 90 .setGroupDividerEnabled(mAdapterMenu.isGroupDividerEnabled() 91 && (currGroupId != prevGroupId)); 92 93 MenuView.ItemView itemView = (MenuView.ItemView) convertView; 94 if (mForceShowIcon) { 95 ((ListMenuItemView) convertView).setForceShowIcon(true); 96 } 97 itemView.initialize(getItem(position), 0); 98 return convertView; 99 } 100 findExpandedIndex()101 void findExpandedIndex() { 102 final MenuItemImpl expandedItem = mAdapterMenu.getExpandedItem(); 103 if (expandedItem != null) { 104 final ArrayList<MenuItemImpl> items = mAdapterMenu.getNonActionItems(); 105 final int count = items.size(); 106 for (int i = 0; i < count; i++) { 107 final MenuItemImpl item = items.get(i); 108 if (item == expandedItem) { 109 mExpandedIndex = i; 110 return; 111 } 112 } 113 } 114 mExpandedIndex = -1; 115 } 116 117 @Override notifyDataSetChanged()118 public void notifyDataSetChanged() { 119 findExpandedIndex(); 120 super.notifyDataSetChanged(); 121 } 122 }