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

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/tmb_background">

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

</FrameLayout>