TabHost的基本使用方法
非常简单的例子说明一个TabHost的使用

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" ><TabHost    android:id="@android:id/tabhost"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_alignParentBottom="true"    android:layout_alignParentLeft="true" >    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:orientation="vertical" >        <TabWidget            android:id="@android:id/tabs"            android:layout_width="match_parent"            android:layout_height="wrap_content" >        </TabWidget>        <FrameLayout            android:id="@android:id/tabcontent"            android:layout_width="match_parent"            android:layout_height="match_parent" >            <LinearLayout                android:id="@+id/tab1"                android:layout_width="match_parent"                android:layout_height="match_parent" >            </LinearLayout>            <LinearLayout                android:id="@+id/tab2"                android:layout_width="match_parent"                android:layout_height="match_parent" >            </LinearLayout>            <LinearLayout                android:id="@+id/tab3"                android:layout_width="match_parent"                android:layout_height="match_parent" >            </LinearLayout>        </FrameLayout>    </LinearLayout></TabHost></RelativeLayout>

package com.msg.vo;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.app.AlertDialog;import android.app.Dialog;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.AdapterView.OnItemLongClickListener;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.TabHost;import android.widget.TabHost.TabSpec;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);createTabs();}private void createTabs(){TabHost th = (TabHost)findViewById(android.R.id.tabhost);th.setup();TabSpec ts1 = th.newTabSpec("1");ts1.setIndicator("tab1");ts1.setContent(R.id.tab1);TabSpec ts2 = th.newTabSpec("2");ts2.setIndicator("tab2");ts2.setContent(R.id.tab2);TabSpec ts3 = th.newTabSpec("3");ts3.setIndicator("tab3");ts3.setContent(R.id.tab3);th.addTab(ts1);th.addTab(ts2);th.addTab(ts3);}}