Customized circular checkbox in Android

I am trying to get the Google apps photo select UI .. Am using Appcompat checkbox to achieve that with out success. The steps I am working on , 1. Set the checkbox background to custom circular shape 2. define custom shape in xml

This is my check box xml looks like ,

 <android.support.v7.widget.AppCompatCheckBox
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/checkBox"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:button="@drawable/photo_upload_custom_checkbox"
            />

My custom checkbox background,

   <shape xmlns:android="http://ift.tt/nIICcg"
   android:shape="oval">
    <stroke
       android:width="1dp"
       android:color="#78d9ff"/>
    <solid
    android:color="#79bfea"/>
   </shape>

I even changed from android:background to android:button .. nothing gives me the circular check box .. Any help is appreciated ? Should I use floating action bar ? or a view ? Any suggestions ?