操作方法
首先当然是主Activity啦：package com.wyj.tabmenu;import android.app.TabActivity;import android.content.Intent;import android.os.Bundle;import android.view.Window;import android.widget.RadioGroup;import android.widget.RadioGroup.OnCheckedChangeListener;import android.widget.TabHost;import android.widget.TabHost.TabSpec;public class TabMenu extends TabActivity{// 创建TabHostpublic TabHost mth;public static final String TAB_HOME = "首页";public static final String TAB_NEWS = "信息";public static final String TAB_ABOUT = "关于";public static final String TAB_SEARCH = "搜索";public static final String TAB_PAGE = "更多";public RadioGroup radioGroup;@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);// 去除标题requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.main);// 初始化底部菜单init();// 底部菜单点击事件clickevent();}/*** 每一个底部按钮点击事件，切换相应的界面*/private void clickevent(){this.radioGroup = (RadioGroup) findViewById(R.id.main_radio);radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener(){@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId){// 根据点击的按钮跳转到相应的界面switch (checkedId){case R.id.radio_button0:mth.setCurrentTabByTag(TAB_HOME);break;case R.id.radio_button1:mth.setCurrentTabByTag(TAB_NEWS);break;case R.id.radio_button2:mth.setCurrentTabByTag(TAB_ABOUT);break;case R.id.radio_button3:mth.setCurrentTabByTag(TAB_SEARCH);break;case R.id.radio_button4:mth.setCurrentTabByTag(TAB_PAGE);break;}}});}/*** 实例化TabHost,往TabHost添加5个界面*/private void init(){// 实例化TabHostmth = this.getTabHost();TabSpec ts1 = mth.newTabSpec(TAB_HOME).setIndicator(TAB_HOME);ts1.setContent(new Intent(TabMenu.this, Home_Page.class));mth.addTab(ts1);// 往TabHost中第一个底部菜单添加界面TabSpec ts2 = mth.newTabSpec(TAB_NEWS).setIndicator(TAB_NEWS);ts2.setContent(new Intent(TabMenu.this, News_Page.class));mth.addTab(ts2);TabSpec ts3 = mth.newTabSpec(TAB_ABOUT).setIndicator(TAB_ABOUT);ts3.setContent(new Intent(TabMenu.this, About_Page.class));mth.addTab(ts3);TabSpec ts4 = mth.newTabSpec(TAB_SEARCH).setIndicator(TAB_SEARCH);ts4.setContent(new Intent(TabMenu.this, Search_Page.class));mth.addTab(ts4);TabSpec ts5 = mth.newTabSpec(TAB_PAGE).setIndicator(TAB_PAGE);ts5.setContent(new Intent(TabMenu.this, More_Page.class));mth.addTab(ts5);}}接下来是各个子Activity，需要填充到主Activity中的界面，先上一个，其他全部一模一样：package com.wyj.tabmenu;import android.app.Activity;import android.os.Bundle;public class Home_Page extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.home_page);}}主界面main.xml:<?xml version="1.0" encoding="utf-8"?><TabHost xmlns:android="http://schemas.android.com/apk/res/android"android:id="@android:id/tabhost"android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#667744" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><FrameLayoutandroid:id="@+id/msg_title"android:layout_width="fill_parent"android:layout_height="wrap_content"android:visibility="gone" ><TextViewandroid:id="@+id/tv_wb"android:layout_width="fill_parent"android:layout_height="wrap_content"android:background="@drawable/titlebar_lightgray_bg" ></TextView></FrameLayout><FrameLayoutandroid:id="@android:id/tabcontent"android:layout_width="fill_parent"android:layout_height="0.0dip"android:layout_weight="1.0" /><TabWidgetandroid:id="@android:id/tabs"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="0.0"android:visibility="gone" /><RadioGroupandroid:id="@+id/main_radio"android:layout_width="fill_parent"android:layout_height="45dp"android:layout_gravity="bottom"android:background="@drawable/main_tab_btn_bg"android:gravity="center_vertical"android:orientation="horizontal" ><RadioButtonandroid:id="@+id/radio_button0"style="@style/main_tab_bottom"android:layout_height="fill_parent"android:layout_marginTop="2.0dip"android:drawableTop="@drawable/icon_1_n"android:tag="radio_button0"android:text="@string/main_home" /><RadioButtonandroid:id="@+id/radio_button1"style="@style/main_tab_bottom"android:layout_height="fill_parent"android:layout_marginTop="2.0dip"android:drawableTop="@drawable/icon_2_n"android:tag="radio_button1"android:text="@string/main_news" /><RadioButtonandroid:id="@+id/radio_button2"style="@style/main_tab_bottom"android:layout_height="fill_parent"android:layout_marginTop="2.0dip"android:drawableTop="@drawable/icon_3_n"android:tag="radio_button2"android:text="@string/main_my_info" /><RadioButtonandroid:id="@+id/radio_button3"style="@style/main_tab_bottom"android:layout_height="fill_parent"android:layout_marginTop="2.0dip"android:drawableTop="@drawable/icon_4_n"android:tag="radio_button3"android:text="@string/menu_search" /><RadioButtonandroid:id="@+id/radio_button4"style="@style/main_tab_bottom"android:layout_height="fill_parent"android:layout_marginTop="2.0dip"android:drawableTop="@drawable/icon_5_n"android:tag="radio_button4"android:text="@string/more" /></RadioGroup></LinearLayout></TabHost>子Activity-----<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="@drawable/bg"android:orientation="vertical" ><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="40dp"android:background="@drawable/topbar"android:gravity="center_horizontal" ><TextViewandroid:layout_width="wrap_content"android:layout_height="40dp"android:gravity="center_vertical"android:text="XX首页"android:textColor="#FFFFFF"android:textSize="20dp" /></LinearLayout><Buttonandroid:id="@+id/button1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="首页" /></LinearLayout>values/style.xml 代码:<?xml version="1.0" encoding="utf-8"?><resources><style name="main_tab_bottom"><item name="android:textSize">10.0dip</item><item name="android:textColor">#ffffffff</item><item name="android:ellipsize">marquee</item><item name="android:gravity">center_horizontal</item><item name="android:background">@drawable/home_btn_bg</item><item name="android:paddingTop">1.0dip</item><item name="android:layout_width">fill_parent</item><item name="android:layout_height">fill_parent</item><item name="android:button">@null</item><item name="android:singleLine">true</item><item name="android:drawablePadding">1.0dip</item><item name="android:layout_weight">1.0</item></style></resources>home_btn_bg.xml：<?xml version="1.0" encoding="utf-8"?><selectorxmlns:android="http://schemas.android.com/apk/res/android"><item android:state_focused="true" android:state_enabled="true" android:state_pressed="false" android:drawable="@drawable/home_btn_bg_s" /><item android:state_enabled="true" android:state_pressed="true" android:drawable="@drawable/home_btn_bg_s" /><item android:state_enabled="true" android:state_checked="true" android:drawable="@drawable/button_2" /></selector>后来发现一个问题，当TabMenu extends TabActivity时，就无法直接监听返回按键了，后来改了一丢丢，在TabMenu 最下面加上如下代码就OK了：// 监听返回键@Overridepublic boolean dispatchKeyEvent(KeyEvent event){if (event.getAction() == KeyEvent.ACTION_DOWN && event.getKeyCode() == KeyEvent.KEYCODE_BACK){new AlertDialog.Builder(this).setCancelable(false).setTitle("温馨提示").setMessage("您确定要退出吗?").setPositiveButton("确定", new DialogInterface.OnClickListener(){public void onClick(DialogInterface dialog, int which){finish();}}).setNegativeButton("取消", new DialogInterface.OnClickListener(){public void onClick(DialogInterface dialog, int which){}}).show();return true;// 不知道返回true或是false有什么区别??}return super.dispatchKeyEvent(event);}