<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true">
        <layer-list>
            <item>
                <shape>
                    <solid android:color="@android:color/transparent" />
                </shape>
            </item>
            <item android:gravity="center_vertical|start" >
                <shape>
                    <size android:width="4dp" android:height="40dp" />
                    <solid android:color="?colorSecondary" />
                    <corners android:bottomRightRadius="8dp" android:topRightRadius="8dp" />
                </shape>
            </item>
        </layer-list>
    </item>

    <item>
        <shape>
            <solid android:color="?android:colorBackground" />
        </shape>
    </item>

</selector>