samples/LiveEffect/src/main/res/drawable/balance_seekbar.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
    <item android:id="@android:id/background">
        <shape android:shape="rectangle" >
            <solid
                android:color="@color/colorBlue" />
        </shape>
    </item>
    <item android:id="@android:id/progress">
        <clip>
            <shape android:shape="rectangle" >
                <solid
                    android:color="@color/colorBlue" />
            </shape>
        </clip>
    </item>
</layer-list>