How to make relative layout with box shadow

There are two ways to create shadow:

1. If sdk version is lower than 5.0...

   A. You can also use android drawable image

   android:background="@android:drawable/dialog_holo_light_frame"
   

   B. Use below shadow_round.xml to make a drawable background for shadow of view. android:background="@drawable/shadow_round

    <!-- Drop Shadow Stack -->
    <item>
       <shape>
           <padding android:top="1dp" android:right="1dp" android:bottom="2dp" android:left="1dp" />
           <corners android:radius="10dp" />
           <solid android:color="#00CCCCCC" />
       </shape>
   </item>
   <item>
       <shape>
           <padding android:top="1dp" android:right="1dp" android:bottom="2dp" android:left="1dp" />
           <corners android:radius="10dp" />
           <solid android:color="#10CCCCCC" />
       </shape>
   </item>
   <item>
       <shape>
           <padding android:top="1dp" android:right="1dp" android:bottom="2dp" android:left="1dp" />
           <corners android:radius="10dp" />
           <solid android:color="#20CCCCCC" />
       </shape>
   </item>
    <item>
       <shape>
           <padding android:top="1dp" android:right="1dp" android:bottom="2dp" android:left="1dp" />
           <corners android:radius="10dp" />
           <solid android:color="#30CCCCCC" />
       </shape>
   </item>
   <item>
       <shape>
           <padding android:top="1dp" android:right="1dp" android:bottom="2dp" android:left="1dp" />
           <corners android:radius="10dp" />
           <solid android:color="#50CCCCCC" />
       </shape>
   </item> 
   
   <!-- Background -->
   <item>
   <shape>
       <solid android:color="#ffffff" />
       <corners android:radius="10dp" />
   </shape>
   </item>
   

2. If you are using SDK 5.0 or greater then use the view's elevation property.

   android:elevation="2dp"
   

simple add elevation property in your relative layout. or create xml in drowable folder and call as a background

   <?xml version="1.0" encoding="utf-8"?>

       <shape  
             xmlns:android="http://schemas.android.com/apk/res/android"
             android:shape="rectangle">
       <solid android:color="#ddd" />
       <stroke
           android:width="5dp"
           android:color="#b8b9b9" />
       <corners
           android:radius="3dp" />
       </shape>