Рамка в андроиде делается фоновым рисунком. Вот тесколько вариантов фона:

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="YOUR BORDER COLOR" />
        </shape>
    </item>
    <item android:top="YOUR TOP BORDER THICKNESS">
        THE THING YOU WANT A BORDER ON
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <!-- Border -->
    <item>
        <shape>
            <solid android:color="#f000"></solid>
        </shape>
    </item>
    <!-- Body -->
    <item android:left="2dip"
          android:top="2dp"
          android:right="2dp">
        <shape>
            <solid android:color="#ffafafaf"></solid>
        </shape> 
    </item>
</layer-list>

<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item>
      <shape android:shape="rectangle">
            <solid android:color="@color/detailtable_border" />
        </shape>
   </item>
 
   <item android:left="1.5dp" android:right="1.5dp" android:bottom="2dp">
      <shape android:shape="rectangle">
        <solid android:color="@color/detailrow_bg_normal" />
      </shape>
   </item>
</layer-list>

<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
    <stroke android:width="4dp" android:color="#FF00FF00" /> 
    <solid android:color="#ffffff" /> 
    <padding android:left="7dp" android:top="7dp" 
            android:right="7dp" android:bottom="0dp" /> 
    <corners android:radius="4dp" /> 
</shape>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape android:shape="rectangle">
        <solid android:color="#FF0000" />
    </shape>
</item>
<item android:left="5dp">
    <shape android:shape="rectangle">
        <solid android:color="#000000" />
    </shape>
</item>
</layer-list>

http://stackoverflow.com/questions/1598119/is-there-an-easy-way-to-add-a-border-to-the-top-and-bottom-of-an-android-view

http://stackoverflow.com/questions/9211208/how-to-draw-border-on-just-one-side-of-a-linear-layout http://stackoverflow.com/questions/10457135/how-to-add-border-around-linear-layout-except-at-the-bottom http://stackoverflow.com/questions/10972789/how-i-can-put-bottom-and-left-border-on-textview http://stackoverflow.com/questions/2224644/drawing-top-border-on-a-shape-on-android http://stackoverflow.com/questions/10571026/how-to-remove-border-only-from-bottom-of-the-element