Signal-Android/app/src/main/res/layout/username_education_fragment.xml

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

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="@dimen/signal_m3_toolbar_height"
            android:minHeight="@dimen/signal_m3_toolbar_height"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:navigationIcon="@drawable/ic_arrow_left_24" />

        <com.google.android.material.imageview.ShapeableImageView
            android:id="@+id/username_symbol"
            android:layout_width="72dp"
            android:layout_height="72dp"
            android:layout_marginTop="64dp"
            android:background="@color/signal_colorSurface2"
            app:contentPadding="16dp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:shapeAppearanceOverlay="@style/ShapeAppearanceOverlay.Signal.Circle"
            app:srcCompat="@drawable/symbol_at_24" />

        <TextView
            android:id="@+id/title"
            style="@style/Signal.Text.HeadlineLarge"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginHorizontal="@dimen/dsl_settings_gutter"
            android:layout_marginTop="12dp"
            android:text="@string/UsernameEducationFragment__set_up_your_signal_username"
            android:textAlignment="center"
            android:textColor="@color/signal_colorOnSurface"
            app:layout_constrainedWidth="true"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username_symbol" />

        <ImageView
            android:id="@+id/username_education_icon_1"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginStart="32dp"
            android:layout_marginTop="40dp"
            android:importantForAccessibility="no"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/title"
            app:srcCompat="@drawable/number_color_48" />

        <TextView
            android:id="@+id/username_education_text_1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="32dp"
            android:textAppearance="@style/Signal.Text.BodyLarge"
            android:textColor="@color/signal_colorOnSurfaceVariant"
            android:text="@string/UsernameEducationFragment__usernames_are_paired_with_a_set_of_digits"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/username_education_icon_1"
            app:layout_constraintTop_toTopOf="@id/username_education_icon_1" />

        <ImageView
            android:id="@+id/username_education_icon_2"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginStart="32dp"
            android:layout_marginTop="36dp"
            android:importantForAccessibility="no"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username_education_icon_1"
            app:srcCompat="@drawable/link_color_48" />

        <TextView
            android:id="@+id/username_education_text_2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="32dp"
            android:textAppearance="@style/Signal.Text.BodyLarge"
            android:textColor="@color/signal_colorOnSurfaceVariant"
            android:text="@string/UsernameEducationFragment__each_username_has_a_unique_qr_code"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/username_education_icon_2"
            app:layout_constraintTop_toTopOf="@id/username_education_icon_2" />

        <ImageView
            android:id="@+id/username_education_icon_3"
            android:layout_width="48dp"
            android:layout_height="48dp"
            android:layout_marginStart="32dp"
            android:layout_marginTop="36dp"
            android:importantForAccessibility="no"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username_education_icon_2"
            app:srcCompat="@drawable/lock_color_48" />

        <TextView
            android:id="@+id/username_education_text_3"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginEnd="32dp"
            android:textAppearance="@style/Signal.Text.BodyLarge"
            android:textColor="@color/signal_colorOnSurfaceVariant"
            android:text="@string/UsernameEducationFragment__turn_off_phone_number_discovery"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@id/username_education_icon_3"
            app:layout_constraintTop_toTopOf="@id/username_education_icon_3" />

        <androidx.constraintlayout.widget.Barrier
            android:id="@+id/username_education_row_3_barrier"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:barrierDirection="bottom"
            app:constraint_referenced_ids="username_education_icon_3,username_education_text_3" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/username_education_learn_more"
            style="@style/Widget.Signal.Button.TextButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="24dp"
            android:text="@string/LearnMoreTextView_learn_more"
            android:textAppearance="@style/Signal.Text.BodyLarge"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username_education_row_3_barrier" />

        <com.google.android.material.button.MaterialButton
            android:id="@+id/continue_button"
            style="@style/Signal.Widget.Button.Large.Tonal"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="16dp"
            android:layout_marginBottom="64dp"
            android:text="@string/UsernameEducationFragment__continue"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@id/username_education_learn_more"
            app:layout_constraintVertical_bias="1" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>