Android选项菜单用法实例分析

本文实例讲述了android选项菜单用法。分享给大家供大家参考。具体如下：

android平台下所提供的菜单大体上可分为三类：选项菜单、上下文菜单和子菜单。

当activity在前台运行时，如果用户按下手机上的menu键，此时就会在屏幕低端弹出相应的选项菜单。但这个功能需要开发人员编程来实现的，如果在开发应用程序时没有实现该功能，那么程序运行时按下手机的meun键是不会起作用的。

对于携带图标的选项菜单，每次最多只能显示6个，当菜单选项多于6个时，将只显示前5个和一个扩展菜单选项，点击扩展菜单选项将会弹出其余的菜单项。扩展菜单项中将不会显示图标，但是可以显示单选按钮和复选框。

以下模拟选项菜单

main.xml布局文件：

<?xml version="1.0" encoding="utf-8"?>
<linearlayout android:id="@+id/linearlayout01"
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent"
  android:orientation="vertical"
  xmlns:android="http://schemas.android.com/apk/res/android">
  <scrollview android:id="@+id/scrollview"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <edittext android:id="@+id/edittext"
      android:layout_width="fill_parent"
      android:layout_height="fill_parent" 
      android:editable="false"
      android:cursorvisible="false" 
      android:text="您的选择为\n">
    </edittext>
  </scrollview>
</linearlayout>

meunactivity类：

package com.ljq.activity;
import android.app.activity;
import android.os.bundle;
import android.view.menu;
import android.view.menuitem;
import android.view.submenu;
import android.view.menuitem.onmenuitemclicklistener;
import android.widget.edittext;
public class meunactivity extends activity {
  private final int menu_gender_male = 0; 
  private final int menu_gender_female = 1;
  private final int menu_hobby1 = 2; 
  private final int menu_hobby2 = 3;
  private final int menu_hobby3 = 4; 
  private final int menu_ok = 5; 
  private final int menu_gender = 6;
  private final int menu_hobby = 7; 
  private final int gender_group = 0;
  private final int hobby_group = 1; 
  private final int main_group = 2; 
  menuitem[] hoddymenuitems = new menuitem[3];// 爱好菜单项组
  menuitem malemenuitem = null;// 男性菜单项
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
  }
  /**j
   * 初始化选项菜单
   */
  @override
  public boolean oncreateoptionsmenu(menu menu) {
    //单选菜单选项
    submenu gendermenu = menu.addsubmenu(main_group, menu_gender, 0, "性别");
    gendermenu.seticon(r.drawable.gender);
    gendermenu.setheadericon(r.drawable.gender);
    malemenuitem = gendermenu.add(gender_group, menu_gender_male, 0, "男");
    malemenuitem.setchecked(true);
    gendermenu.add(gender_group, menu_gender_female, 0, "女");
    //设置菜单项为单选菜单项，互斥的
    gendermenu.setgroupcheckable(gender_group, true, true);
    //复选菜单选项
    submenu hobbymenu = menu.addsubmenu(main_group,menu_hobby,0,"爱好");
    hobbymenu.seticon(r.drawable.hobby);
    hobbymenu.setheadericon(r.drawable.hobby);
    hoddymenuitems[0]=hobbymenu.add(hobby_group, menu_hobby1, 0, "游泳");
    hoddymenuitems[1]=hobbymenu.add(hobby_group, menu_hobby2, 0, "唱歌");
    hoddymenuitems[2]=hobbymenu.add(hobby_group, menu_hobby3, 0, "编程");
    //设置菜单项为复选菜单项
    hoddymenuitems[0].setcheckable(true);
    hoddymenuitems[1].setcheckable(true);
    hoddymenuitems[2].setcheckable(true);
    //确定菜单项
    menuitem ok=menu.add(main_group,menu_ok,0,"确定");
    ok.setonmenuitemclicklistener(new onmenuitemclicklistener(){
      public boolean onmenuitemclick(menuitem item) {
        appendstatestr();
        return true;
      }
    });
    //给确定菜单项添加快捷键
    ok.setalphabeticshortcut('o');//设置字符快捷键
    //ok.setnumericshortcut('1');//设置数字快捷键
    //ok.setshortcut('a', '2');//同时设置两种快捷键。注意：同时设置多次时只有最后一个设置起作用
    return true; // 记得返回true，否则无效
  }
  /**
   * 在菜单选项中某个选项被选中时调用该事件
   */
  @override
  public boolean onoptionsitemselected(menuitem item) {
    switch (item.getitemid()) {
    case menu_gender_male:
     case menu_gender_female:
       item.setchecked(true); 
       appendstatestr();
       break;  
     case menu_hobby1:
     case menu_hobby2:
     case menu_hobby3:
      item.setchecked(!item.ischecked());
      appendstatestr();
      break;  
    }
    return true;
  }
  public void appendstatestr() {
    string result = "您选择的性别为：";
    if (malemenuitem.ischecked()) {
      result = result + "男";
    } else {
      result = result + "女";
    }
    string hobbystr = "";
    for (menuitem hoddy : hoddymenuitems) {
      if (hoddy.ischecked()) {
        hobbystr = hobbystr + hoddy.gettitle() + "、";
      }
    }
    if (hobbystr.length() > 0) {
      result = result + ",您的爱好为："
          + hobbystr.substring(0, hobbystr.length() - 1) + "。\n";
    } else {
      result = result + "。\n";
    }
    edittext et = (edittext) meunactivity.this.findviewbyid(r.id.edittext);
    et.append(result);
  }
}

运行结果：

希望本文所述对大家的android程序设计有所帮助。