open-keychain/OpenKeychain/src/main/res/layout-large/encrypt_files_activity.xml

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

    <android.support.v4.widget.FixedDrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <include layout="@layout/drawer_list" />

    </android.support.v4.widget.FixedDrawerLayout>

    <include layout="@layout/encrypt_files_content" />
</FrameLayout>