转--创建选项卡实现弹出菜单，以及自定义菜单样式。

TabHost相信大家都很熟悉，我们经常看到的底部栏就是基于TabHost实现的,也就是常用的选项卡，用来切换不同的Activity，但是怎么去实现弹出菜单呢，又怎么让每个Activity中都能弹出菜单呢，不多说，看代码。

首先我自定义一个BaseActivity，在这里实现对菜单的操作。

  1 package com.android;
  2 import java.util.ArrayList;
  3 import java.util.HashMap;
  4 
  5 import com.android.R;
  6 import com.anroid.net.update1;
  7 import android.app.Activity;
  8 import android.app.AlertDialog;
  9 import android.content.DialogInterface;
 10 import android.content.DialogInterface.OnKeyListener;
 11 import android.content.Intent;
 12 import android.os.Bundle;
 13 import android.provider.Settings;
 14 import android.view.KeyEvent;
 15 import android.view.Menu;
 16 import android.view.View;
 17 import android.widget.AdapterView;
 18 import android.widget.GridView;
 19 import android.widget.SimpleAdapter;
 20 import android.widget.TextView;
 21 import android.widget.AdapterView.OnItemClickListener;
 22 
 23 public class BaseActivity extends Activity {
 24     protected TextView tv_head;
 25     AlertDialog menuDialog;// menu菜单Dialog
 26     GridView menuGrid;
 27     View menuView;    
 28     /** 菜单图片 **/
 29     int[] menu_image_array = { 
 30              R.drawable.menu_quit,R.drawable.menu_checkupdate,R.drawable.menu_checknet,R.drawable.menu_about,R.drawable.menu_rename,R.drawable.menu_return
 31              };
 32     /** 菜单文字 **/
 33     String[] menu_name_array = {  "退出","检查更新", "设置网络","关于","上传 ","返回"  };
 34 
 35     @Override
 36     protected void onCreate(Bundle savedInstanceState) {
 37         // TODO Auto-generated method stub
 38         super.onCreate(savedInstanceState);    
 39         menuView = View.inflate(this, R.layout.gridview_menu, null);
 40         // 创建AlertDialog
 41         menuDialog = new AlertDialog.Builder(this).create();
 42         menuDialog.setView(menuView);
 43         menuDialog.setOnKeyListener(new OnKeyListener() {
 44             public boolean onKey(DialogInterface dialog, int keyCode,
 45                     KeyEvent event) {
 46                 if (keyCode == KeyEvent.KEYCODE_MENU)// 监听按键
 47                     dialog.dismiss();
 48                 return false;
 49             }
 50         });
 51         menuGrid = (GridView) menuView.findViewById(R.id.gridview);
 52         menuGrid.setAdapter(getMenuAdapter(menu_name_array, menu_image_array));
 53         /** 监听menu选项 **/
 54         menuGrid.setOnItemClickListener(new OnItemClickListener() {
 55             public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
 56                     long arg3) {
 57                 switch (arg2) {
 58                 case 0:// 退出
 59                     BaseActivity.this.finish();
 60                     break;
 61                 case 1:// 检查更新
 62                     update1 doup=new update1(getApplicationContext());
 63                     doup.execute();    
 64                     break;
 65                 case 2:// 检查网络
 66                     Intent i2 = new Intent();
 67                     i2.setAction(Settings.ACTION_WIRELESS_SETTINGS);
 68                     startActivity(i2);
 69                     break;
 70                 case 3:// 关于
 71                     final Intent i3  = new Intent(getApplicationContext(),About.class);
 72                       startActivity(i3);
 73                       menuDialog.dismiss();
 74                     
 75                     break;
 76                 case 4:// 上传
 77 
 78                     break;
 79                 case 5:// 返回
 80                     menuDialog.dismiss();
 81                     break;
 82                 
 83                 }                            
 84             }
 85         });
 86         
 87     }
 88     public boolean onCreateOptionsMenu(Menu menu) {
 89         menu.add("menu");// 必须创建一项
 90         return super.onCreateOptionsMenu(menu);
 91     }    
 92     private SimpleAdapter getMenuAdapter(String[] menuNameArray,
 93             int[] imageResourceArray) {
 94         ArrayList<HashMap<String, Object>> data = new ArrayList<HashMap<String, Object>>();
 95         for (int i = 0; i < menuNameArray.length; i++) {
 96             HashMap<String, Object> map = new HashMap<String, Object>();
 97             map.put("itemImage", imageResourceArray[i]);
 98             map.put("itemText", menuNameArray[i]);
 99             data.add(map);
100         }
101         SimpleAdapter simperAdapter = new SimpleAdapter(this, data,
102                 R.layout.item_menu, new String[] { "itemImage", "itemText" },
103                 new int[] { R.id.item_image, R.id.item_text });
104         return simperAdapter;
105     }
106     @Override
107     public boolean onMenuOpened(int featureId, Menu menu) {
108         if (menuDialog == null) {
109             menuDialog = new AlertDialog.Builder(this).setView(menuView).show();
110         } else {
111             menuDialog.show();
112         }
113         return false;// 返回为true 则显示系统menu
114     }    
115 
116     @Override
117     
118     public boolean onKeyDown(int keyCode, KeyEvent event) {
119         // TODO Auto-generated method stub
120 
121         if (keyCode == KeyEvent.KEYCODE_BACK) {
122 
123             AlertDialog.Builder builder = new AlertDialog.Builder(getParent());
124             builder.setMessage("你确定退出吗？")
125                     .setCancelable(false)
126                     .setPositiveButton("确定",
127                             new DialogInterface.OnClickListener() {
128                                 public void onClick(DialogInterface dialog,
129                                         int id) {
130                                     finish();
131                                     System.exit(0);
132                                 }
133                             })
134                     .setNegativeButton("返回",
135                             new DialogInterface.OnClickListener() {
136                                 public void onClick(DialogInterface dialog,
137                                         int id) {
138                                     dialog.cancel();
139                                 }
140                             });
141             AlertDialog alert = builder.create();
142             alert.show();
143             return true;
144         }
145 
146         return super.onKeyDown(keyCode, event);
147     }
148     private void  showsetting(){
149         
150         
151     }
152 }

界面文件；

<?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="3"
         android:verticalSpacing="10dip"
         android:horizontalSpacing="10dip"
         android:stretchMode="columnWidth"
         android:gravity="center"
         />
</LinearLayout>

然后让每个tab的Activity都继承自BaseActiviy，这样就实现了每个Tab中都能弹出菜单。下面贴出怎样创建Tab选项卡。

package com.android;
import com.android.R;

import android.app.TabActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.RadioGroup.OnCheckedChangeListener;

public class MainActivity extends TabActivity {
    private static TabHost tabHost;private static RadioButton main_tab_myExam;
    private static Context context;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.main);
        context=this;
        main_tab_myExam=(RadioButton) findViewById(R.id.main_tab_myExam);     
        tabHost=this.getTabHost();
        TabHost.TabSpec spec;
        Intent intent;
       
        intent=new Intent().setClass(this, Qiu.class);
        spec=tabHost.newTabSpec("糗事").setIndicator("糗事").setContent(intent);
        tabHost.addTab(spec);       
        intent=new Intent().setClass(this,Dz.class);
        spec=tabHost.newTabSpec("笑话").setIndicator("笑话").setContent(intent);
        tabHost.addTab(spec);     
        intent=new Intent().setClass(this, New.class);
        spec=tabHost.newTabSpec("最新").setIndicator("最新").setContent(intent);
        tabHost.addTab(spec);         
        intent=new Intent().setClass(this, Fa.class);
        spec=tabHost.newTabSpec("收藏").setIndicator("收藏").setContent(intent);
        tabHost.addTab(spec);
//        tabHost.setCurrentTab(1);
        
        RadioGroup radioGroup=(RadioGroup) this.findViewById(R.id.main_tab_group);
        radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                // TODO Auto-generated method stub
                switch (checkedId) {
                case R.id.main_tab_addExam:
                    tabHost.setCurrentTabByTag("糗事");
                    break;
                case R.id.main_tab_myExam:
                    tabHost.setCurrentTabByTag("笑话");
                    break;
                case R.id.main_tab_message:
                    tabHost.setCurrentTabByTag("最新");
                    break;
                case R.id.main_tab_settings:
                    tabHost.setCurrentTabByTag("收藏");
                    break;
                default:
                    break;
                }
            }
        });
    }   
}

然后让这里面的四个Acyivity都继承自BaseActivity就行了。