帮忙看下我的tab布局有问题，谢谢了

我已经用代码设置全屏了，但是还会有白边，而且网上提供的设置tabs文字居中也不管用  ，我是android 2.1.
谢谢大家了
下面是我的布局代码,求真正管用设置TabWidget文字居中的代码，或者自定义的
<?xml version="1.0" encoding="utf-8"?>
 <TabHost 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
 android:layout_marginTop="-15dp"
><LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">    <ImageView 
                     android:src="@drawable/xlhead"
                       android:layout_width="fill_parent"
                      
                   android:layout_height="50dp"
                  android:scaleType="fitXY"
                   android:layout_marginTop="-15dp"
                      />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:layout_weight="1">  <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s1"
                 >
                 
           <ListView      
               android:id="@+tab/lv1"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>           
            </LinearLayout>
            
            
             <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s2"
       
                 >
            
                 <ListView      
               android:id="@+tab/lv2"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>       
          </LinearLayout>
          
             
        <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s3"
       
                 >
            
                 <ListView      
               android:id="@+tab/lv3"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>   
            </LinearLayout>
          
         <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s4"
       
                 >
            
                 <ListView      
               android:id="@+tab/lv4"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>   
       </LinearLayout>         
            <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s5"
       
                 >
            
                 <ListView      
               android:id="@+tab/lv5"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>   
       </LinearLayout>
       
            
               <LinearLayout 
                  android:layout_width="fill_parent"
    android:layout_height="fill_parent"
     android:orientation="horizontal"
      android:id="@+tab/s6"
       
                 >
            
                 <ListView      
               android:id="@+tab/lv6"
             android:layout_width="fill_parent"
    android:layout_height="fill_parent"
            >
       </ListView>   
       </LinearLayout>
</FrameLayout><TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:layout_marginBottom="-5dp"/></LinearLayout></TabHost>