open-keychain/OpenKeychain/src/main/res/layout-large/decrypt_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
            xmlns:bootstrapbutton="http://schemas.android.com/apk/res-auto"
            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/decrypt_content"/>

</FrameLayout>