项目笔记2：系统菜单OptionsMenu的用法

今天老大分配的任务是完成系统菜单，刚开始我木呀，什么都不懂，还好提醒了我，是OptionsMenu，然后就上网找找，有点点小小的成就感

今天就两个内容，一个是系统自己自带的（也是我采用的） 二是自定义的，我也照着写了，但是出了问题，为啥我目前没明白，还是先贴来吧

一、系统的

    item：每一个item对应一项菜单。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:orientation ="vertical">

  <TextView android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="请点击Menu键显示选项菜单"
            android:id="@+id/TextView02"/>
</LinearLayout>

OptionMenuDemo.java

package com.option;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class OptionsMenuDemo extends Activity {
    /** Called when the activity is first created. */
/*  final static int ONE = Menu.FIRST;
    final static int TWO = Menu.FIRST + 1;*/

    // final static int THREE = Menu.FIRST+2;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // setContentView(R.layout.main);
        setContentView(R.layout.main1);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub

        menu.add(Menu.NONE, Menu.FIRST + 1, 1, "首页").setIcon(R.drawable.home);
        menu.add(Menu.NONE, Menu.FIRST + 2, 2, "新建").setIcon(R.drawable.sys_begin);
        menu.add(Menu.NONE, Menu.FIRST + 3, 3, "查询").setIcon(R.drawable.sys_query);
        menu.add(Menu.NONE, Menu.FIRST + 4, 4, "新闻").setIcon(R.drawable.sys_news);
        menu.add(Menu.NONE, Menu.FIRST + 5, 5, "退出").setIcon(R.drawable.menu_exit);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        super.onOptionsItemSelected(item);
        Intent intent = new Intent();

        switch (item.getItemId()) {
        case Menu.FIRST + 1:
            /*Toast.makeText(this, "首页", Toast.LENGTH_LONG).show();
            break;*/
            intent.setClass(OptionsMenuDemo.this, testActivity1.class);
            startActivity(intent);
            break;
        case Menu.FIRST + 2:
            Toast.makeText(this, "新建", Toast.LENGTH_LONG).show();
            break;

        case Menu.FIRST + 3:
            Toast.makeText(this, "查询", Toast.LENGTH_LONG).show();
            break;

        case Menu.FIRST + 4:
            Toast.makeText(this, "新闻", Toast.LENGTH_LONG).show();
            break;

        case Menu.FIRST + 5:
            AlertDialog alertDialog = new AlertDialog.Builder(this)
                    .setTitle("退出系统")
                    .setMessage("是否退出本系统？")
                    .setPositiveButton("确定",
                            new DialogInterface.OnClickListener() {
                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    // TODO Auto-generated method stub
                                    System.exit(1);
                                }
                            })
                    .setNegativeButton("取消",
                            new DialogInterface.OnClickListener() {

                                @Override
                                public void onClick(DialogInterface dialog,
                                        int which) {
                                    // TODO Auto-generated method stub
                                    return;
                                }
                            }).create();
            alertDialog.show();
            break;
        }
        return false;

    }

    /*public void onOptionsMenuClosed(Menu menu) {
        Toast.makeText(this, "你关闭了选项菜单", Toast.LENGTH_SHORT).show();
    }*/

    public boolean onPrepareOptionMenu(Menu menu) {
        Toast.makeText(this, "选项菜单显示之前onPrepareOptionsMenu方法会被调用",
                Toast.LENGTH_LONG).show();
        return true;
    }

}

效果：

单击退出出现

PS：关于项目，有很多的基类，所以，将这里的两个方法复制到基类中去即onCreateOptionsMenu

onOptionsItemSelected，如果有些方法在别的页面都一样，就写在基类中，否则，就写一个抽象方法，然后到具体的页面再去实现抽象方法，子类继承抽象类的方法，要实现抽象类中所有的抽象方法，这个明天尽量争取实现了~~后期也会有笔记~

 

　一些解释：

  　android:icon：用于指定菜单显示的图标。

　　android:title：菜单的标题，显示在图标下面。

　　android:alphabeticShortcut：菜单选择的快捷键。

　　关于Menu的更多属性请查看SDK上的 Menu Resource   可以查看另一种方式：http://www.cnblogs.com/keyindex/articles/1813764.html

二、别人的自定义的

1.gridview_menu.xml　(首先自定义菜单界面，我是GridView来包含菜单项，4列3行)
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"><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>
2.item_menu.xml菜单项的现实样式，一个图标和一个文字。
<?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:id="@+id/item_image" android:layout_centerHorizontal="true" android:layout_width="wrap_content" android:layout_height="wrap_content"></ImageView><TextView android:layout_below="@id/item_image" android:id="@+id/item_text" android:layout_centerHorizontal="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="选项"></TextView></RelativeLayout>

<p>3<span style="font-family:宋体;">、定义，主类</span></p><p>private boolean isMore= false;// menu<span style="font-family:宋体;">菜单翻页控制</span>
 AlertDialog menuDialog;// menu<span style="font-family:宋体;">菜单</span><span style="font-family:Courier New;">Dialog</span>
 GridView menuGrid;
 View menuView;

private finalint ITEM_SEARCH= 0;// 搜索
 private finalint ITEM_FILE_MANAGER= 1;// 文件管理
 private finalint ITEM_DOWN_MANAGER= 2;// 下载管理
 private finalint ITEM_FULLSCREEN= 3;// 全屏
 private finalint ITEM_MORE= 11;// 菜单


/** <span style="font-family:宋体;">菜单图片 </span><span style="font-family:Courier New;">**/</span>
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 };
/** <span style="font-family:宋体;">菜单文字 </span><span style="font-family:Courier New;">**/</span>
 String[] menu_name_array= {"<span style="font-family:宋体;">搜索</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">文件管理</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">下载管理</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">全屏</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">网址</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">书签</span><span style="font-family:Courier New;">"</span>,
"<span style="font-family:宋体;">加入书签</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">分享页面</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">退出</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">夜间模式</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">刷新</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">更多</span><span style="font-family:Courier New;">"</span> };
/** <span style="font-family:宋体;">菜单图片</span><span style="font-family:Courier New;">2 **/</span>
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 };
/** <span style="font-family:宋体;">菜单文字</span><span style="font-family:Courier New;">2 **/</span>
 String[] menu_name_array2= {"<span style="font-family:宋体;">自动横屏</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">笔选模式</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">阅读模式</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">浏览模式</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">快捷翻页</span><span style="font-family:Courier New;">"</span>,
"<span style="font-family:宋体;">检查更新</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">检查网络</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">定时刷新</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">设置</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">帮助</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">关于</span><span style="font-family:Courier New;">"</span>,"<span style="font-family:宋体;">返回</span><span style="font-family:Courier New;">"</span> };</p><p>4<span style="font-family:宋体;">、</span>如果第一次打开则设置视图，否则直接显示<span style="font-family:Times New Roman;">menuDialog</span><span style="font-family:宋体;">视图。</span></p><p>@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<span style="font-family:Courier New;">true </span><
span style="font-family:宋体;">则显示系统</span><span style="font-
family:Courier New;">menu</span>
 }</p><p>1、getMenuAdapter方法 为菜单添加菜单项</p><p>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;
 }</p><p>6<span style="font-family:宋体;">、</span></p><p>Override
public boolean onCreateOptionsMenu(Menu menu) {
 menu.add("menu");// 必须创建一项
 return super.onCreateOptionsMenu(menu);
</p><p>7、onCreate<span style="font-family:宋体;">方法重写</span></p><p>@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
 super.onCreate(savedInstanceState);

 setContentView(R.layout.main);

 menuView= View.inflate(this, R.layout.gridview_menu,null);
// 创建<span style="font-family:Courier New;">AlertDialog</span>
 menuDialog= new AlertDialog.Builder(this).create();
 menuDialog.setView(menuView);
 menuDialog.setOnKeyListener(new OnKeyListener() {
public boolean onKey(DialogInterface dialog,int keyCode,
 KeyEventevent) {
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));
/** <span style="font-
family:宋体;">监听</span><span style="font-family:Courier New;"&
gt;menu</span><span style="font-family:宋体;">选项 </span&
gt;<span style="font-family:Courier New;">**/</span>
 menuGrid.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1,int arg2,
long arg3) {
switch (arg2) {
case ITEM_SEARCH:// 搜索

break;
case ITEM_FILE_MANAGER:// 文件管理

break;
case ITEM_DOWN_MANAGER:// 下载管理

break;
case ITEM_FULLSCREEN:// 全屏

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<span style="font-family:Courier New;">menu</span>
 menuGrid.setSelection(ITEM_MORE);
break;
 }


 }
 });
 }</p>

参考的是http://www.cnblogs.com/keyindex/articles/1813764.html 是这个网站的