package com.lxt008;import android.app.AlertDialog;import android.app.Dialog;import android.app.TabActivity;import android.content.DialogInterface;import android.graphics.Color;import android.os.Bundle;import android.widget.TabHost;import android.widget.TabHost.OnTabChangeListener;public class Activity01 extends TabActivity{    //声明TabHost对象    TabHost mTabHost;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                //取得TabHost对象        mTabHost = getTabHost();                /* 为TabHost添加标签 */        //新建一个newTabSpec(newTabSpec)        //设置其标签和图标(setIndicator)        //设置内容(setContent)        mTabHost.addTab(mTabHost.newTabSpec("tab_test1")                .setIndicator("TAB 1",getResources().getDrawable(R.drawable.img1))                .setContent(R.id.textview1));        mTabHost.addTab(mTabHost.newTabSpec("tab_test2")                .setIndicator("TAB 2",getResources().getDrawable(R.drawable.img2))                .setContent(R.id.textview2));        mTabHost.addTab(mTabHost.newTabSpec("tab_test3")                .setIndicator("TAB 3",getResources().getDrawable(R.drawable.img3))                .setContent(R.id.textview3));                //设置TabHost的背景颜色        mTabHost.setBackgroundColor(Color.argb(150, 22, 70, 150));        //设置TabHost的背景图片资源        //mTabHost.setBackgroundResource(R.drawable.bg0);                //设置当前显示哪一个标签        mTabHost.setCurrentTab(0);                //标签切换事件处理，setOnTabChangedListener         mTabHost.setOnTabChangedListener(new OnTabChangeListener()        {            // TODO Auto-generated method stub            @Override            public void onTabChanged(String tabId)             {                    Dialog dialog = new AlertDialog.Builder(Activity01.this)                            .setTitle("提示")                            .setMessage("当前选中："+tabId+"标签")                            .setPositiveButton("确定",                            new DialogInterface.OnClickListener()                             {                                public void onClick(DialogInterface dialog, int whichButton)                                {                                    dialog.cancel();                                }                            }).create();//创建按钮                                  dialog.show();            }                    });    }}

<?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">    <LinearLayout        android:orientation="vertical"        android:layout_width="fill_parent"        android:layout_height="fill_parent">        <TabWidget            android:id="@android:id/tabs"            android:layout_width="fill_parent"            android:layout_height="wrap_content" />        <FrameLayout            android:id="@android:id/tabcontent"            android:layout_width="fill_parent"            android:layout_height="fill_parent">            <TextView                 android:id="@+id/textview1"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                 android:text="this is a tab" />            <TextView                 android:id="@+id/textview2"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                 android:text="this is another tab" />            <TextView                 android:id="@+id/textview3"                android:layout_width="fill_parent"                android:layout_height="fill_parent"                 android:text="this is a third tab" />        </FrameLayout>    </LinearLayout></TabHost>