1、Android的Menu简介
Android系统的Menu主要有三种:OptionsMenu、ContextMenu、SubMenu
自定义Menu可参考:http://www.cnblogs.com/salam/archive/2011/04/04/2005329.html
2、OptionsMenu用法
2.1、创建Menu
按下Menu键时,屏幕底部就会弹出menu选项,提供选择。创建OptionsMenu的方法是在Activity类中复写onCreateOptionsMenu(),然后通过menu.add()方法添加各种选项,add方法的详细参数和返回值如下 :
Java代码 收藏代码
public abstract MenuItem add (int groupId, int itemId, int order, CharSequence title)
groupId,组别,用来划分itemid的。一般为Menu.NONE
itemId,ID。是menu识别编号,供识别menu用的,很重要
order,顺序。这个参数的大小决定菜单选项出现的先后顺序。顺序按照参数由小到大
title,显示文本
返回值为ture时,menu才有效,若是 return false;则menu不能显示,也就是说menu无效。
复写方法onCreateOptionsMenu()时,就有个 return super.onCreateOptionsMenu(menu);,默认就行了。
添加menu选项例子:
menu.add(Menu.NONE,0,0,"添加").setIcon(android.R.drawable.ic_menu_add);
switch (item.getItemId()) { case 0: Toast.makeText(this, "添加", Toast.LENGTH_SHORT).show(); break; default: Toast.makeText(this, "方法还没定义", Toast.LENGTH_SHORT).show(); break; } return super.onOptionsItemSelected(item);
SubMenu submenu=menu.addSubMenu(Menu.NONE, 0, 0, "添加") .setIcon(android.R.drawable.ic_menu_add); submenu.add(Menu.NONE, 10, 0, "从网络添加"); submenu.add(Menu.NONE, 11, 1, "从本地添加"); submenu.add()方法不能设置图标,设置了也是无效的;但是submenu本身可以设置图标,submenu.setIcon();4、ContextMenu用法
this.registerForContextMenu(findViewById(R.id.et));
public class MenuActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); this.registerForContextMenu(findViewById(R.id.et)); //注册到EditText,et是它的id } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { // TODO Auto-generated method stub menu.add(Menu.NONE, 0, 0, "添加"); menu.add(Menu.NONE, 1, 1, "保存"); super.onCreateContextMenu(menu, v, menuInfo); } @Override public boolean onContextItemSelected(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case 0: Toast.makeText(this, "添加", Toast.LENGTH_SHORT).show(); break; case 1: Toast.makeText(this, "保存", Toast.LENGTH_SHORT).show(); break; default: Toast.makeText(this, "方法还没定义", Toast.LENGTH_SHORT).show(); break; } return super.onContextItemSelected(item); } }5、自定义菜单
Grid_view_menu.xml代码 <!-- 用于定义自定义Menu的布局 --> <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <GridView android:id="@+id/gridview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:numColumns="4" android:verticalSpacing="10dip" android:horizontalSpacing="10dip" android:stretchMode="columnWidth" android:gravity="center" /> </LinearLayout> Item_menu.xml代码 <!-- 用于定义Menu单个按钮的样式 --> <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/RelativeLayout_Item" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingBottom="5dip" > <ImageView android:contentDescription="@string/autoMenuIcon" android:id="@+id/item_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" > </ImageView> <TextView android:id="@+id/item_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/item_image" android:layout_centerHorizontal="true" android:text="@string/menuText" > </TextView> </RelativeLayout>
//完整代码代码 public class AndroidMenuActivity extends Activity { /** Called when the activity is first created. */ private boolean isMore = false;// menu菜单翻页控制 View menuView; GridView menuGrid; AlertDialog menuDialog;// menu菜单Dialog private final int ITEM_SEARCH = 0;// 搜索 private final int ITEM_FILE_MANAGER = 1;// 文件管理 private final int ITEM_DOWN_MANAGER = 2;// 下载管理 private final int ITEM_FULLSCREEN = 3;// 全屏 private final int ITEM_MORE = 11;// 菜单 /** 菜单图片 **/ int[] menu_image_array = { R.drawable.menu_search, R.drawable.menu_filemanager, R.drawable.menu_downmanager, R.drawable.menu_fullscreen, R.drawable.menu_inputurl, R.drawable.menu_bookmark, R.drawable.menu_bookmark_sync_import, R.drawable.menu_sharepage, R.drawable.menu_quit, R.drawable.menu_nightmode, R.drawable.menu_refresh, R.drawable.menu_more }; /** 菜单文字 **/ String[] menu_name_array = { "搜索", "文件管理", "下载管理", "全屏", "网址", "书签", "加入书签", "分享页面", "退出", "夜间模式", "刷新", "更多" }; /** 菜单图片2 **/ int[] menu_image_array2 = { R.drawable.menu_auto_landscape, R.drawable.menu_penselectmodel, R.drawable.menu_page_attr, R.drawable.menu_novel_mode, R.drawable.menu_page_updown, R.drawable.menu_checkupdate, R.drawable.menu_checknet, R.drawable.menu_refreshtimer, R.drawable.menu_syssettings, R.drawable.menu_help, R.drawable.menu_about, R.drawable.menu_return }; /** 菜单文字2 **/ String[] menu_name_array2 = { "自动横屏", "笔选模式", "阅读模式", "浏览模式", "快捷翻页", "检查更新", "检查网络", "定时刷新", "设置", "帮助", "关于", "返回" }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); //通过grid_view_menu.xml menuView = View.inflate(this, R.layout.grid_view_menu, null); // 创建AlertDialog menuDialog = new AlertDialog.Builder(this).create(); menuDialog.setView(menuView); menuDialog.setOnKeyListener(new OnKeyListener() { public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) { // TODO Auto-generated method stub if (keyCode == KeyEvent.KEYCODE_MENU)// 监听按键 dialog.dismiss(); return false; } }); menuGrid = (GridView) menuView.findViewById(R.id.gridview); menuGrid.setAdapter(getMenuAdapter(menu_name_array, menu_image_array)); /** 监听menu选项 **/ menuGrid.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) { switch (arg2) { case ITEM_SEARCH:break; case ITEM_FILE_MANAGER:break; case ITEM_DOWN_MANAGER:break; case ITEM_FULLSCREEN:break; case ITEM_MORE:// 翻页 if (isMore) { menuGrid.setAdapter(getMenuAdapter(menu_name_array2,menu_image_array2)); isMore = false; } else {// 首页 menuGrid.setAdapter(getMenuAdapter(menu_name_array,menu_image_array)); isMore = true; } menuGrid.invalidate();// 更新menu menuGrid.setSelection(ITEM_MORE); break; } } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { // TODO Auto-generated method stub menu.add("menu");// 必须创建一项 return super.onCreateOptionsMenu(menu); } private SimpleAdapter getMenuAdapter(String[] menuNameArray, int[] imageResourceArray) { ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>(); for (int i = 0; i < menuNameArray.length; i++) { HashMap<String, Object> map = new HashMap<String, Object>(); map.put("itemImage", imageResourceArray[i]); map.put("itemText", menuNameArray[i]); data.add(map); } SimpleAdapter simperAdapter = new SimpleAdapter( this, data, R.layout.item_menu, new String[] { "itemImage", "itemText" }, new int[] { R.id.item_image, R.id.item_text } ); return simperAdapter; } @Override public boolean onMenuOpened(int featureId, Menu menu) { if (menuDialog == null) { menuDialog = new AlertDialog.Builder(this).setView(menuView).show(); } else { menuDialog.show(); } return false;// 返回为true 则显示系统menu } }