PlayerAndroid/app/src/main/res/layout/fragment_volume.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="horizontal">

    <code.name.monkey.retromusic.views.IconImageView
        android:id="@+id/volume_down"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:background="?roundSelector"
        android:padding="16dp"
        app:srcCompat="@drawable/ic_volume_down_white_24dp" />

    <androidx.appcompat.widget.AppCompatSeekBar
        android:id="@+id/volume_seekbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"  />

    <code.name.monkey.retromusic.views.IconImageView
        android:id="@+id/volume_up"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:background="?roundSelector"
        android:padding="16dp"
        app:srcCompat="@drawable/ic_volume_up_white_24dp" />
</LinearLayout>