Java tutorial
/* 50AH-code ========= 50 Android Hacks (http://manning.com/sessa/) book source code Copyright (c) 2012 Manning Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* * Copyright (C) 2010 The Android Open Source Project * * 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. */ package com.actionbarsherlock.internal.view.menu; import java.util.ArrayList; import java.util.List; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.view.KeyEvent; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import com.actionbarsherlock.view.SubMenu; /** * @hide */ public class ActionMenu implements Menu { private Context mContext; private boolean mIsQwerty; private ArrayList<ActionMenuItem> mItems; public ActionMenu(Context context) { mContext = context; mItems = new ArrayList<ActionMenuItem>(); } public Context getContext() { return mContext; } public MenuItem add(CharSequence title) { return add(0, 0, 0, title); } public MenuItem add(int titleRes) { return add(0, 0, 0, titleRes); } public MenuItem add(int groupId, int itemId, int order, int titleRes) { return add(groupId, itemId, order, mContext.getResources().getString(titleRes)); } public MenuItem add(int groupId, int itemId, int order, CharSequence title) { ActionMenuItem item = new ActionMenuItem(getContext(), groupId, itemId, 0, order, title); mItems.add(order, item); return item; } public int addIntentOptions(int groupId, int itemId, int order, ComponentName caller, Intent[] specifics, Intent intent, int flags, MenuItem[] outSpecificItems) { PackageManager pm = mContext.getPackageManager(); final List<ResolveInfo> lri = pm.queryIntentActivityOptions(caller, specifics, intent, 0); final int N = lri != null ? lri.size() : 0; if ((flags & FLAG_APPEND_TO_GROUP) == 0) { removeGroup(groupId); } for (int i = 0; i < N; i++) { final ResolveInfo ri = lri.get(i); Intent rintent = new Intent(ri.specificIndex < 0 ? intent : specifics[ri.specificIndex]); rintent.setComponent( new ComponentName(ri.activityInfo.applicationInfo.packageName, ri.activityInfo.name)); final MenuItem item = add(groupId, itemId, order, ri.loadLabel(pm)).setIcon(ri.loadIcon(pm)) .setIntent(rintent); if (outSpecificItems != null && ri.specificIndex >= 0) { outSpecificItems[ri.specificIndex] = item; } } return N; } public SubMenu addSubMenu(CharSequence title) { // TODO Implement submenus return null; } public SubMenu addSubMenu(int titleRes) { // TODO Implement submenus return null; } public SubMenu addSubMenu(int groupId, int itemId, int order, CharSequence title) { // TODO Implement submenus return null; } public SubMenu addSubMenu(int groupId, int itemId, int order, int titleRes) { // TODO Implement submenus return null; } public void clear() { mItems.clear(); } public void close() { } private int findItemIndex(int id) { final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { if (items.get(i).getItemId() == id) { return i; } } return -1; } public MenuItem findItem(int id) { return mItems.get(findItemIndex(id)); } public MenuItem getItem(int index) { return mItems.get(index); } public boolean hasVisibleItems() { final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { if (items.get(i).isVisible()) { return true; } } return false; } private ActionMenuItem findItemWithShortcut(int keyCode, KeyEvent event) { // TODO Make this smarter. final boolean qwerty = mIsQwerty; final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { ActionMenuItem item = items.get(i); final char shortcut = qwerty ? item.getAlphabeticShortcut() : item.getNumericShortcut(); if (keyCode == shortcut) { return item; } } return null; } public boolean isShortcutKey(int keyCode, KeyEvent event) { return findItemWithShortcut(keyCode, event) != null; } public boolean performIdentifierAction(int id, int flags) { final int index = findItemIndex(id); if (index < 0) { return false; } return mItems.get(index).invoke(); } public boolean performShortcut(int keyCode, KeyEvent event, int flags) { ActionMenuItem item = findItemWithShortcut(keyCode, event); if (item == null) { return false; } return item.invoke(); } public void removeGroup(int groupId) { final ArrayList<ActionMenuItem> items = mItems; int itemCount = items.size(); int i = 0; while (i < itemCount) { if (items.get(i).getGroupId() == groupId) { items.remove(i); itemCount--; } else { i++; } } } public void removeItem(int id) { mItems.remove(findItemIndex(id)); } public void setGroupCheckable(int group, boolean checkable, boolean exclusive) { final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { ActionMenuItem item = items.get(i); if (item.getGroupId() == group) { item.setCheckable(checkable); item.setExclusiveCheckable(exclusive); } } } public void setGroupEnabled(int group, boolean enabled) { final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { ActionMenuItem item = items.get(i); if (item.getGroupId() == group) { item.setEnabled(enabled); } } } public void setGroupVisible(int group, boolean visible) { final ArrayList<ActionMenuItem> items = mItems; final int itemCount = items.size(); for (int i = 0; i < itemCount; i++) { ActionMenuItem item = items.get(i); if (item.getGroupId() == group) { item.setVisible(visible); } } } public void setQwertyMode(boolean isQwerty) { mIsQwerty = isQwerty; } public int size() { return mItems.size(); } }