<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
  android:shape="rectangle"> 
  <solid android:color="@color/transparent"/> 
  <stroke 
    android:width="1dp" 
    android:color="#ce1818" /> 
  <corners android:radius="@dimen/public_space_value_5"/> 
</shape> 

<Button 
        android:layout_width="80dp" 
        android:layout_height="50dp" 
        android:background="@drawable/bg_red_hollow_rectangle" 
        android:gravity="center" 
        android:text="分享" />