Signal-Android/res/layout/camera_controls_portrait.xml

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

    <Button
        android:id="@+id/camera_capture_button"
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:layout_marginBottom="24dp"
        android:background="@drawable/ic_camera_shutter"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageButton
        android:id="@+id/camera_flip_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="16dp"
        android:layout_marginTop="14dp"
        android:src="@drawable/ic_switch_camera_32"
        android:scaleType="fitCenter"
        android:background="?selectableItemBackgroundBorderless"
        android:visibility="gone"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        tools:visibility="visible" />
    
    <com.makeramen.roundedimageview.RoundedImageView
        android:id="@+id/camera_gallery_button"
        android:layout_width="36dp"
        android:layout_height="36dp"
        android:layout_marginStart="32dp"
        android:scaleType="centerCrop"
        app:layout_constraintTop_toTopOf="@id/camera_capture_button"
        app:layout_constraintBottom_toBottomOf="@id/camera_capture_button"
        app:layout_constraintStart_toStartOf="parent"
        app:riv_corner_radius="4dp"
        app:riv_border_color="@color/core_white"
        app:riv_border_width="2dp"/>

    <include
        android:id="@+id/camera_count_button"
        layout="@layout/mediasend_count_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="11dp"
        android:layout_marginBottom="14dp"
        android:layout_marginEnd="32dp"
        android:layout_gravity="bottom|end"
        android:visibility="gone"
        app:layout_constraintTop_toTopOf="@id/camera_capture_button"
        app:layout_constraintBottom_toBottomOf="@id/camera_capture_button"
        app:layout_constraintEnd_toEndOf="parent"
        tools:visibility="visible" />

</androidx.constraintlayout.widget.ConstraintLayout>