open-keychain/OpenKeychain/src/main/res/layout/view_key_fragment.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingTop="16dp"
        android:paddingLeft="16dp"
        android:paddingRight="16dp">

        <android.support.v7.widget.CardView
            android:id="@+id/card_view"
            android:layout_gravity="center"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            card_view:cardCornerRadius="4dp">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <TextView
                    style="@style/SectionHeader"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginTop="8dp"
                    android:text="@string/section_user_ids" />

                <org.sufficientlysecure.keychain.ui.widget.FixedListView
                    android:id="@+id/view_key_user_ids"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginBottom="4dp" />
            </LinearLayout>
        </android.support.v7.widget.CardView>


    </LinearLayout>

</ScrollView>