转:android 自定义RadioButton样式

<?xml version="1.0" encoding="utf-8"?>   
<selector xmlns:android="http://schemas.android.com/apk/res/android">   
    <item   
    android:state_checked="false"   
    android:drawable="@drawable/tabswitcher_long" />   
    <item   
    android:state_checked="true"   
    android:drawable="@drawable/tabswitcher_short" />   
</selector>   

　<RadioGroup  

        android:gravity="center"  
        android:orientation="horizontal"    
        android:layout_width="fill_parent"     
        android:layout_height="wrap_content"  
        >  
        <RadioButton     
            android:id="@+id/btn_0"    
            android:layout_width="fill_parent"     
            android:layout_height="wrap_content"  
            android:text="最新信息"   
            android:textSize="17.0sp"     
            android:textColor="@android:color/black"    
            android:gravity="center"   
            android:layout_weight="1"  
            android:checked="true"  
            android:button="@null"  
            android:background="@drawable/radio"  
            />    
        <RadioButton     
            android:id="@+id/btn_1"  
            android:layout_width="fill_parent"     
            android:layout_height="wrap_content"  
            android:text="在线专家"  
            android:textSize="17.0sp"  
            android:textColor="@android:color/black"    
            android:gravity="center"  
            android:layout_weight="1"  
            android:button="@null"  
            android:background="@drawable/radio"  
            />    
        <RadioButton     
            android:id="@+id/btn_2"  
            android:layout_width="fill_parent"     
            android:layout_height="wrap_content"  
            android:text="预约服务"  
            android:textSize="17.0sp"  
            android:textColor="@android:color/black"    
            android:gravity="center"  
            android:layout_weight="1"  
            android:button="@null"  
            android:background="@drawable/radio"  
            />    
    </RadioGroup>