zircles-android/app/src/main/res/layout/fragment_scan.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    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">

    <!-- Guidelines -->

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline_overlay_start"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.136" />

    <androidx.constraintlayout.widget.Guideline
        android:id="@+id/guideline_overlay_end"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintGuide_percent="0.864" />

    <!-- Spacers -->


    <Space
        android:id="@+id/spacer_bottom_left"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintWidth_percent="0.116"
        tools:background="@color/zcashRed" />

    <Space
        android:id="@+id/spacer_bottom_right"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintWidth_percent="0.116"
        tools:background="@color/zcashRed" />

    <androidx.camera.view.PreviewView
        android:id="@+id/preview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- Overlays -->

    <View
        android:id="@+id/overlay_bottom"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/spacer_overlay" />

    <View
        android:id="@+id/overlay_end"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toBottomOf="@id/spacer_overlay"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/spacer_overlay"
        app:layout_constraintTop_toTopOf="@id/spacer_overlay" />

    <View
        android:id="@+id/overlay_start"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toBottomOf="@id/spacer_overlay"
        app:layout_constraintEnd_toStartOf="@id/spacer_overlay"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/spacer_overlay" />

    <View
        android:id="@+id/overlay_top"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toTopOf="@id/spacer_overlay"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <!-- being anal with these -->
    <View
        android:id="@+id/overlay_top_left_notch"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintStart_toEndOf="@id/overlay_start"
        app:layout_constraintTop_toBottomOf="@id/overlay_top"
        app:layout_constraintWidth_percent="0.02" />

    <View
        android:id="@+id/overlay_top_right_notch"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toStartOf="@id/overlay_end"
        app:layout_constraintTop_toBottomOf="@id/overlay_top"
        app:layout_constraintWidth_percent="0.02" />

    <View
        android:id="@+id/overlay_bottom_left_notch"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toTopOf="@id/overlay_bottom"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintStart_toEndOf="@id/overlay_start"
        app:layout_constraintWidth_percent="0.02" />

    <View
        android:id="@+id/overlay_bottom_right_notch"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="@color/scan_overlay_background"
        app:layout_constraintBottom_toTopOf="@id/overlay_bottom"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toStartOf="@id/overlay_end"
        app:layout_constraintWidth_percent="0.02" />

    <ImageView
        android:id="@+id/scan_frame"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:scaleType="centerCrop"
        android:src="@drawable/ic_scan_frame"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toStartOf="@id/spacer_bottom_right"
        app:layout_constraintStart_toEndOf="@id/spacer_bottom_left"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.3" />

    <com.google.android.material.button.MaterialButton
        android:id="@+id/button_receive"
        android:layout_width="0dp"
        android:layout_height="0dp"
        style="@style/Zcash.Button.White"
        android:gravity="center"
        android:padding="12dp"
        android:text="Switch to Your Address"
        android:textAppearance="@style/TextAppearance.MaterialComponents.Body1"
        android:textColor="#000000"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toStartOf="@id/spacer_bottom_right"
        app:layout_constraintHeight_percent="0.2"
        app:layout_constraintStart_toEndOf="@id/spacer_bottom_left"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.9226" />

    <ImageView
        android:id="@+id/back_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:tint="@color/text_light"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.05"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.065"
        app:srcCompat="@drawable/ic_close_black_24dp" />

    <View
        android:id="@+id/back_button_hit_area"
        android:layout_width="56dp"
        android:layout_height="56dp"
        android:clickable="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.01"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.045" />

    <TextView
        android:id="@+id/text_title"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        style="@style/TextAppearance.MaterialComponents.Headline6"
        android:autoSizeTextType="uniform"
        android:maxLines="1"
        android:text="Scan Recipient Address"
        android:textColor="@color/text_light"
        app:layout_constraintBottom_toBottomOf="@id/back_button"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toEndOf="@id/back_button_hit_area"
        app:layout_constraintTop_toTopOf="@id/back_button" />

    <Space
        android:id="@+id/spacer_overlay"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="H,1:1"
        app:layout_constraintEnd_toStartOf="@id/guideline_overlay_end"
        app:layout_constraintStart_toEndOf="@id/guideline_overlay_start"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.305"
        tools:background="#60ff0000" />
</androidx.constraintlayout.widget.ConstraintLayout>