In certain cases, according to the application we need to change the mark or the drawable of the checkbox.

Step 1:- Create selector in the  drawable, say checkbox_selector.xml :-

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
     <item
           android:state_checked="true"
           android:drawable="@drawable/checkbox_selected" />
    <item 
          android:state_checked="false" 
          android:drawable="@drawable/checkbox" />
</selector>

Step 2:-  include above created drawable in the intended checkbox as below:-

   <CheckBox   
      android:id="@+id/ch_tns"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content" 
      android:button="@drawable/checkbox_selector"/>