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

<LinearLayout 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="wrap_content"
    android:orientation="vertical"
    android:paddingBottom="16dp"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:paddingTop="16dp">

    <android.support.v7.widget.CardView
        android:id="@+id/card_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        card_view:cardBackgroundColor="?attr/colorCardViewBackground"
        card_view:cardCornerRadius="4dp"
        card_view:cardElevation="2dp"
        card_view:cardUseCompatPadding="true">

        <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_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:visibility="gone"
        card_view:cardBackgroundColor="?attr/colorCardViewBackground"
        card_view:cardCornerRadius="4dp"
        card_view:cardElevation="2dp"
        card_view:cardUseCompatPadding="true">

        <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:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="?android:selectableItemBackground"
                android:clickable="true"
                android:orientation="horizontal">

                <ImageView
                    android:id="@+id/system_contact_picture"
                    android:layout_width="48dp"
                    android:layout_height="48dp"
                    android:layout_margin="6dp"
                    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:text="@string/view_key_fragment_no_system_contact"
                    android:textAppearance="?android:attr/textAppearanceMedium" />
            </LinearLayout>
        </LinearLayout>
    </android.support.v7.widget.CardView>

</LinearLayout>