<selector xmlns:android="http://schemas.android.com/apk/res/android" >

     <item

         android:drawable="@drawable/sel_check"

         android:state_checked="true"/>

     <item

         android:drawable="@drawable/sel_nor"

         android:state_checked="false"/>

     <item

         android:drawable="@drawable/sel_nor"/>

 </selector>

  <!-- CustomCheckBox theme -->

     <style name="CustomCheckBoxTheme" parent="@android:style/Widget.CompoundButton.CheckBox">

         <item name="android:button">@drawable/checkbox_style</item>

     </style>

 <CheckBox

                 android:id="@+id/tv_upper"

                 android:layout_width="wrap_content"

                 android:layout_height="wrap_content"

                 android:gravity="center_vertical"

                 style="@style/CustomCheckBoxTheme" />