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

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/widget_holder"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:id="@+id/widget_imageview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:src="@mipmap/ic_launcher"/>

</RelativeLayout>