volume_control.xml

Enable keyboard shortcuts

<?xml version="1.0" encoding="utf-8"?>

<merge xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"

    android:background="@drawable/media_controls_background">

    <SeekBar

        android:id="@+id/volumeSeekBar"

        android:layout_width="74dp"

        android:layout_height="10dp"

        android:layout_marginLeft="1dp"

        android:rotation="270"

        android:transformPivotX="36dp"

        android:transformPivotY="5dp"

        android:layout_gravity="center"

        android:paddingTop="3dp"

        android:paddingBottom="3dp"

        android:paddingLeft="3dp"

        android:paddingRight="3dp"

        android:max="1000"

        android:progress="0"

        android:background="@null"

        android:shape="oval"

        android:splitTrack="false"

        android:progressDrawable="@drawable/volume_seekbar_background"

        android:secondaryProgress="0"

        android:thumbOffset="1dp"

        android:thumb="@drawable/media_seekbar_thumb" />

</merge>