FossifyGallery/app/src/main/res/layout/photo_video_tmb.xml

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

    <FrameLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/medium_thumbnail_holder"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:foreground="@drawable/selector">

        <com.simplemobiletools.gallery.views.MyImageView
            android:id="@+id/medium_thumbnail"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>

    </FrameLayout>
</merge>