dialog_image.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/large_image"
        android:layout_width="match_parent"
        android:layout_height="167dp"
        android:background="@color/white"
        android:scaleType="centerInside" />
</LinearLayout>