session-android/res/layout/activity_pn_mode.xml

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

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@drawable/default_session_background"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/very_large_spacing"
            android:layout_marginTop="@dimen/very_large_spacing"
            android:layout_marginRight="@dimen/very_large_spacing"
            android:textSize="@dimen/large_font_size"
            android:textStyle="bold"
            android:textColor="@color/text"
            android:text="@string/activity_pn_mode_title" />

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/very_large_spacing"
            android:layout_marginTop="@dimen/small_spacing"
            android:layout_marginRight="@dimen/very_large_spacing"
            android:textSize="@dimen/small_font_size"
            android:textColor="@color/text"
            android:text="@string/activity_pn_mode_explanation" />

        <LinearLayout
            android:id="@+id/fcmOptionView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/very_large_spacing"
            android:layout_marginTop="12dp"
            android:layout_marginRight="@dimen/very_large_spacing"
            android:padding="12dp"
            android:orientation="vertical"
            android:background="@drawable/pn_option_background">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="@dimen/medium_spacing"
                android:textColor="@color/text"
                android:textStyle="bold"
                android:text="@string/activity_pn_mode_fcm_option_title" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="4dp"
                android:textSize="@dimen/very_small_font_size"
                android:textColor="@color/text"
                android:text="@string/activity_pn_mode_fcm_option_explanation" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="4dp"
                android:textSize="@dimen/very_small_font_size"
                android:textColor="@color/accent"
                android:textStyle="bold"
                android:text="@string/activity_pn_mode_recommended_option_tag" />

        </LinearLayout>

        <LinearLayout
            android:id="@+id/backgroundPollingOptionView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="@dimen/very_large_spacing"
            android:layout_marginTop="@dimen/small_spacing"
            android:layout_marginRight="@dimen/very_large_spacing"
            android:padding="12dp"
            android:orientation="vertical"
            android:background="@drawable/pn_option_background">

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:textSize="@dimen/medium_spacing"
                android:textColor="@color/text"
                android:textStyle="bold"
                android:text="@string/activity_pn_mode_background_polling_option_title" />

            <TextView
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="4dp"
                android:textSize="@dimen/very_small_font_size"
                android:textColor="@color/text"
                android:text="@string/activity_pn_mode_background_polling_option_explanation" />

        </LinearLayout>

        <Button
            style="@style/MediumProminentFilledButton"
            android:id="@+id/registerButton"
            android:layout_width="match_parent"
            android:layout_height="@dimen/medium_button_height"
            android:layout_marginLeft="@dimen/massive_spacing"
            android:layout_marginTop="@dimen/medium_spacing"
            android:layout_marginRight="@dimen/massive_spacing"
            android:layout_marginBottom="@dimen/medium_spacing"
            android:text="@string/continue_2" />

    </LinearLayout>

</ScrollView>