自定义RadioButton 文字在下，图片在上

<LinearLayout android:id="@+id/status_toolbar"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:orientation="horizontal"
    android:background="@drawable/status_toolbar_bg"
    android:gravity="center_vertical|center_horizontal"
    >

    <RadioButton
        android:background="@android:color/transparent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@null"
        android:drawableTop="@drawable/status_refresh_selector"
        android:gravity="center"
        android:text="刷新"
        android:layout_weight="1"
        android:textColor="@color/white" />

     
       <RadioButton android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@null"
        android:text="评论"
        android:gravity="center"
        android:layout_weight="1"
       android:background="@android:color/transparent"
        android:textColor="@color/white"
        android:drawableTop="@drawable/status_comment_selector"></RadioButton>
     
       <RadioButton android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@null"
        android:text="转发"
        android:gravity="center"
        android:layout_weight="1"
        android:background="@android:color/transparent"
        android:textColor="@color/white"
        android:drawableTop="@drawable/status_forward_selector"></RadioButton>
     
       <RadioButton android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@null"
        android:text="收藏"
        android:gravity="center"
        android:layout_weight="1"
        android:background="@android:color/transparent"
        android:textColor="@color/white"
        android:drawableTop="@drawable/status_fav_selector"></RadioButton>
    
       <RadioButton android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:button="@null"
        android:text="更多"
        android:gravity="center"
        android:layout_weight="1"
        android:background="@android:color/transparent"
        android:textColor="@color/white"
        android:drawableTop="@drawable/status_more_selector"></RadioButton>
      </LinearLayout>

关键语句功能：

android:button="@null" 删除原本系统默认在左的选择框

android:background="@android:color/transparent"  去除左边选择框被删除后的空白

android:drawableTop="@drawable/status_more_selector" 选择图片在文字上面

android:gravity="center" 保证文字与图片在平行

android:layout_weight="1" 使每一个RadioButton占的空间一样大