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。

package com.android;
import java.util.ArrayList;
import java.util.HashMap;

import com.android.R;
import com.anroid.net.update1;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnKeyListener;
import android.content.Intent;
import android.os.Bundle;
import android.provider.Settings;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;

public class BaseActivity extends Activity {
    protected TextView tv_head;
    AlertDialog menuDialog;// menu菜单Dialog
    GridView menuGrid;
    View menuView;    
    /** 菜单图片 **/
    int[] menu_image_array = { 
             R.drawable.menu_quit,R.drawable.menu_checkupdate,R.drawable.menu_checknet,R.drawable.menu_about,R.drawable.menu_rename,R.drawable.menu_return
             };
    /** 菜单文字 **/
    String[] menu_name_array = {  "退出","检查更新", "设置网络","关于","上传 ","返回"  };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);    
        menuView = View.inflate(this, R.layout.gridview_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) {
                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 0:// 退出
                    BaseActivity.this.finish();
                    break;
                case 1:// 检查更新
                    update1 doup=new update1(getApplicationContext());
                    doup.execute();    
                    break;
                case 2:// 检查网络
                    Intent i2 = new Intent();
                    i2.setAction(Settings.ACTION_WIRELESS_SETTINGS);
                    startActivity(i2);
                    break;
                case 3:// 关于
                    final Intent i3  = new Intent(getApplicationContext(),About.class);
                      startActivity(i3);
                      menuDialog.dismiss();
                    
                    break;
                case 4:// 上传

                    break;
                case 5:// 返回
                    menuDialog.dismiss();
                    break;
                
                }                            
            }
        });
        
    }
    public boolean onCreateOptionsMenu(Menu menu) {
        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
    }    

    @Override
    
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        // TODO Auto-generated method stub

        if (keyCode == KeyEvent.KEYCODE_BACK) {

            AlertDialog.Builder builder = new AlertDialog.Builder(getParent());
            builder.setMessage("你确定退出吗？")
                    .setCancelable(false)
                    .setPositiveButton("确定",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int id) {
                                    finish();
                                    System.exit(0);
                                }
                            })
                    .setNegativeButton("返回",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog,
                                        int id) {
                                    dialog.cancel();
                                }
                            });
            AlertDialog alert = builder.create();
            alert.show();
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }
    private void  showsetting(){
        
        
    }
}

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。