Android horizontal progress bar with rounded corners

rounded_corners_progress_drawable.xml

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@android:id/background"
        android:bottom="1dp"
        android:left="1dp"
        android:right="1dp"
        android:top="1dp">
        <!-- 1 dp padding makes the background thinner -->
        <shape>
            <corners android:radius="1dp" />
            <solid android:color="@color/progress_background" />
        </shape>
    </item>

    <item android:id="@android:id/progress">
        <scale android:scaleWidth="100%">
            <shape>
                <!-- For circular endings, the radius must be a half of the heigh -->
                <corners android:radius="2dp" />
                <solid android:color="@color/progress_level" />
            </shape>
        </scale>
    </item>

</layer-list>