Android Shape Divider

安卓框架提供了一种LinearLayout 内部布局元素分割线的实现，建立一个指定长宽的矩形Shape：

  <?xml version="1.0" encoding="utf-8"?>
  <shape xmlns:android="http://schemas.android.com/apk/res/android"
      android:shape="rectangle">
       <size
         android:width="@dimen/spacing_medium"
         android:height="@dimen/spacing_medium" />
      <solid android:color="@android:color/transparent" />
  </shape>

作为LinearLayout的Divider属性引入：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:divider="@drawable/spacer_medium"
     android:orientation="vertical"
     android:padding="@dimen/spacing_medium"
     android:showDividers="middle">

     <!-- TextView -->

     <LinearLayout
         android:id="@+id/buttons_container"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:divider="@drawable/spacer_medium"
         android:orientation="horizontal"
         android:showDividers="middle">

         <!-- Buttons -->

     </LinearLayout>

 </LinearLayout>