Tabwidget- TabWidget选择标签

1./TestTabWidget/res/layout/main.xml:
xml   version="1.0" encoding="utf-8"?>

<TabHostxmlns: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_height="fill_parent"

    android:layout_width="fill_parent"

    >

    <TextView

    android:id="@+id/textview01"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:text="this is one tab!"

    />

    <TextView

    android:id="@+id/textview02"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:text="this is tow tab!"

    />

    <TextView

    android:id="@+id/textview03"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:text="this is third tab!"

    />

    FrameLayout>

    LinearLayout>

TabHost>

2.TestTabWidgetActivity：

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.TabActivity;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.graphics.Color;

import android.os.Bundle;

import android.widget.TabHost;

import android.widget.TabHost.OnTabChangeListener;

 

public class TestTabWidgetActivity extends TabActivity

{

    private TabHost mTabHost;

 

    @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

        mTabHost.addTab(mTabHost.newTabSpec("tab_test1").setIndicator("TAB 1",

               getResources().getDrawable(R.drawable.flag)).setContent(R.id.textview01));

        mTabHost.addTab(mTabHost.newTabSpec("tab_test2").setIndicator("TAB 2",

               getResources().getDrawable(R.drawable.flag2)).setContent(R.id.textview02));

        mTabHost.addTab(mTabHost.newTabSpec("tab_test3").setIndicator("TAB 3",

               getResources().getDrawable(R.drawable.flag3)).setContent(R.id.textview03));

        // 设置TabHost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.icon);

        // 设置当前显示哪一个标签setOnTabChangedListener

        mTabHost.setCurrentTab(0);

        // 标签处理事件

        mTabHost.setOnTabChangedListener(new OnTabChangeListener()

        {

            @Override

            public void onTabChanged(String tabId)

            {

                Dialog dialog = newAlertDialog.Builder(TestTabWidgetActivity.this).setTitle("提示").setMessage(

                        "当前选择的是" + tabId + "号标签").setPositiveButton("确定", newOnClickListener()

                {

                    @Override

                    public voidonClick(DialogInterface dialog, int which)

                    {

                        dialog.cancel();

                    }

                }).create();// 创建按钮

                dialog.show();

            }

        });

 3.效果图：

软件运行：

选择其中的一个标签，出现一个dialog提示框：