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

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:custom="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <org.sufficientlysecure.keychain.ui.widget.ToolableViewAnimator
        android:id="@+id/view_animator"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:animateLayoutChanges="true"
        android:inAnimation="@anim/fade_in"
        android:measureAllChildren="false"
        android:minHeight="?listPreferredItemHeightSmall"
        android:outAnimation="@anim/fade_out"
        android:paddingBottom="16dp"
        android:paddingLeft="24dp"
        android:paddingRight="24dp"
        android:paddingTop="16dp"
        custom:initialView="0">

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/nfc_activity_text"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/nfc_text"
                android:textAppearance="@android:style/TextAppearance.Medium" />

            <ImageView
                android:id="@+id/nfc_image"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_below="@+id/nfc_activity_text"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:src="@drawable/yubikey_phone" />
        </RelativeLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/nfc_activity_text2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/nfc_wait"
                android:textAppearance="@android:style/TextAppearance.Medium" />

            <ProgressBar
                style="?android:attr/progressBarStyleLarge"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_centerVertical="true"
                android:padding="8dp" />

            <!-- placeholder to retain dialog size -->
            <ImageView
                android:id="@+id/nfc_image_placeholder1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_below="@+id/nfc_activity_text2"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:src="@drawable/yubikey_phone"
                android:visibility="invisible" />

        </RelativeLayout>

        <RelativeLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <TextView
                android:id="@+id/nfc_activity_text3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/nfc_finished"
                android:textAppearance="@android:style/TextAppearance.Medium" />

            <!-- placeholder to retain dialog size -->
            <ImageView
                android:id="@+id/nfc_image_placeholder2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:layout_alignParentStart="true"
                android:layout_below="@+id/nfc_activity_text3"
                android:layout_marginTop="8dp"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:src="@drawable/yubikey_phone"
                android:visibility="invisible" />

            <ImageView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true"
                android:layout_centerVertical="true"
                android:adjustViewBounds="true"
                android:background="@android:color/transparent"
                android:src="@drawable/ic_check_circle_black_48dp" />

        </RelativeLayout>

    </org.sufficientlysecure.keychain.ui.widget.ToolableViewAnimator>

</LinearLayout>