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:paddingBottom="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="wrap_content"
            card_view:cardBackgroundColor="@android:color/white"
            card_view:cardElevation="2dp"
            card_view:cardUseCompatPadding="true"
            card_view:cardCornerRadius="4dp">

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

                <TextView
                    style="@style/CardViewHeader"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    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>

        <android.support.v7.widget.CardView
            android:id="@+id/linked_system_contact_card"
            android:layout_gravity="center"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="gone"
            card_view:cardBackgroundColor="@android:color/white"
            card_view:cardElevation="2dp"
            card_view:cardUseCompatPadding="true"
            card_view:cardCornerRadius="4dp">

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

                <TextView
                    style="@style/CardViewHeader"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/section_linked_system_contact"/>

                <LinearLayout
                    android:id='@+id/system_contact_layout'
                    android:clickable="true"
                    android:background="?android:selectableItemBackground"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal">

                    <ImageView
                        android:id="@+id/system_contact_picture"
                        android:layout_margin="6dp"
                        android:layout_width="48dp"
                        android:layout_height="48dp"
                        android:scaleType="centerCrop"
                        android:src="@drawable/ic_person_grey_48dp"/>

                    <TextView
                        android:id="@+id/system_contact_name"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_vertical"
                        android:textAppearance="?android:attr/textAppearanceMedium"
                        android:text="@string/view_key_fragment_no_system_contact"/>
                </LinearLayout>
            </LinearLayout>
        </android.support.v7.widget.CardView>

    </LinearLayout>

</ScrollView>