Android选项菜单用法实例分析

<?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>

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);  }}