這範主是對TabHost元件的重新定義，實現標籤底部顯示，每個標籤的背景和高度，標籤文字的顏色、大小，標籤底部的白色橫線，每個標籤的分割線等屬性的修改。

1.AndroidManifest.xml 

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.android.tabhost" android:versionCode="1"
 android:versionName="1.0">
 <application android:icon="@drawable/icon" android:label="@string/app_name">
  <activity android:name=".MyTabHostFive" android:label="@string/app_name">
   <intent-filter>
    <action android:name="android.intent.action.MAIN" />
    <category android:name="android.intent.category.LAUNCHER" />
   </intent-filter>
  </activity>
  <activity android:name=".Layout1" android:label="@string/app_name" />
  <activity android:name=".Layout2" android:label="@string/app_name" />
  <activity android:name=".Layout3" android:label="@string/app_name" />
 </application>
 <uses-sdk android:minSdkVersion="7" />

</manifest>

2.MyTabHostFive.java

package com.android.tabhost;

import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import android.widget.TabHost.OnTabChangeListener;

public class MyTabHostFive extends TabActivity
{
  
    private TabHost mTabHost;

   
    private TabWidget mTabWidget;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        mTabHost = this.getTabHost();
  
        mTabHost.setPadding(mTabHost.getPaddingLeft(),
                mTabHost.getPaddingTop(), mTabHost.getPaddingRight(),
                mTabHost.getPaddingBottom() - 5);
        Resources rs = getResources();

        Intent layout1intent = new Intent();
        layout1intent.setClass(this, Layout1.class);
        TabHost.TabSpec layout1spec = mTabHost.newTabSpec("layout1");
        layout1spec.setIndicator("layou1",
                rs.getDrawable(android.R.drawable.stat_sys_phone_call));
        layout1spec.setContent(layout1intent);
        mTabHost.addTab(layout1spec);

        Intent layout2intent = new Intent();
        layout2intent.setClass(this, Layout2.class);
        TabHost.TabSpec layout2spec = mTabHost.newTabSpec("layout2");
        layout2spec.setIndicator("layout2",
                rs.getDrawable(android.R.drawable.stat_sys_phone_call_forward));
        layout2spec.setContent(layout2intent);
        mTabHost.addTab(layout2spec);

        Intent layout3intent = new Intent();
        layout3intent.setClass(this, Layout3.class);
        TabHost.TabSpec layout3spec = mTabHost.newTabSpec("layout3");
        layout3spec.setIndicator("layout3",
                rs.getDrawable(android.R.drawable.stat_sys_phone_call_on_hold));
        layout3spec.setContent(layout3intent);
        mTabHost.addTab(layout3spec);

 
        mTabWidget = mTabHost.getTabWidget();
        for (int i = 0; i < mTabWidget.getChildCount(); i++)
        {
        
            View view = mTabWidget.getChildAt(i);
          
            if (mTabHost.getCurrentTab() == i)
            {
                view.setBackgroundDrawable(getResources().getDrawable(
                        R.drawable.number_bg_pressed));
            }
            else
            {
                view.setBackgroundDrawable(getResources().getDrawable(
                        R.drawable.number_bg));
            }
       
            mTabWidget.getChildAt(i).getLayoutParams().height = 50;
            TextView tv = (TextView) mTabWidget.getChildAt(i).findViewById(
                    android.R.id.title);
         
            tv.setTextColor(Color.rgb(49, 116, 171));
        }

   
        mTabHost.setOnTabChangedListener(new OnTabChangeListener()
        {
            @Override
            public void onTabChanged(String tabId)
            {
                for (int i = 0; i < mTabWidget.getChildCount(); i++)
                {
                    View view = mTabWidget.getChildAt(i);
                    if (mTabHost.getCurrentTab() == i)
                    {
                        view.setBackgroundDrawable(getResources().getDrawable(
                                R.drawable.number_bg_pressed));
                    }
                    else
                    {
                        view.setBackgroundDrawable(getResources().getDrawable(
                                R.drawable.number_bg));
                    }
                }
            }
        });
    }
}

3.Layout1.java

package com.android.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Layout1 extends Activity
{
    private TextView textView = null;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout1);
        textView = (TextView) findViewById(R.id.text1);
        textView.setText("我是第一頁");
    }
}

4.Layout2.java

package com.android.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Layout2 extends Activity
{
    private TextView textView = null;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout2);
        textView = (TextView) findViewById(R.id.text2);
        textView.setText("我是第二頁");
    }
}

5.Layout3.java

package com.android.tabhost;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class Layout3 extends Activity
{
    private TextView textView = null;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout3);
        textView = (TextView) findViewById(R.id.text3);
        textView.setText("我是第三頁");
    }
}

6.執行結果:

原始碼下載:http://www.fileserve.com/file/5PEXzbV