nextcloud-android/res/layout/file_activity_details.xml

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

<fragment
    android:id="@+id/fileDetail"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    class="eu.alefzero.owncloud.ui.fragment.FileDetailFragment" />

</LinearLayout>