custom_progress_bar_style.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" android:height="50dp">
        <shape>
            <gradient
                android:startColor="@color/skyblue"
                android:centerColor="@color/colorPrimary"
                android:endColor="@color/orange"
                android:angle="270" />
            <corners android:radius="20dp"/>
        </shape>
    </item>

    <!-- add another layer to design more etc -->
<!--    <item android:id="@android:id/progress" android:height="10dp">-->
<!--        <clip>-->
<!--            <shape>-->
<!--                <gradient-->
<!--                    android:startColor="@color/skyblue"-->
<!--                    android:centerColor="@color/colorPrimary"-->
<!--                    android:centerY="1.0"-->
<!--                    android:endColor="@color/orange"-->
<!--                    android:angle="270"-->
<!--                    />-->
<!--            </shape>-->
<!--        </clip>-->
<!--    </item>-->

</layer-list>