session-android/res/layout/create_passphrase_activity.xml

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:id="@+id/scroll_parent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true"
            android:background="@drawable/background_pattern_repeat">

  <RelativeLayout android:id="@+id/prompt_layout"
                  android:layout_width="match_parent"
                  android:layout_height="wrap_content">

    <ImageView android:id="@+id/watermark"
               android:layout_width="wrap_content"
               android:layout_height="wrap_content"
               android:layout_centerHorizontal="true"
               android:layout_marginBottom="20dp"
               android:src="@drawable/lockscreen_watermark"
               android:contentDescription="@string/PassphrasePromptActivity_watermark_content_description"
               android:layout_marginTop="100dp"/>

    <RelativeLayout android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_below="@id/watermark">

      <ProgressBar android:id="@+id/passphrase_edit"
                   android:layout_width="75dp"
                   android:layout_height="75dp"
                   android:indeterminate="true"
                   android:padding="10dp"
                   android:layout_centerHorizontal="true"/>

    </RelativeLayout>

  </RelativeLayout>

</ScrollView>