seedvault/app/src/main/res/layout/fragment_storage_check.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">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="32dp"
        android:layout_height="32dp"
        android:layout_margin="16dp"
        android:tint="?android:colorAccent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/ic_storage"
        tools:ignore="ContentDescription" />

    <TextView
        android:id="@+id/titleView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:gravity="center_horizontal"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView"
        tools:text="@string/storage_check_fragment_backup_title" />

    <TextView
        android:id="@+id/patienceView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:gravity="center_horizontal"
        android:text="@string/storage_check_fragment_patience"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/titleView" />

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="32dp"
        android:layout_marginEnd="16dp"
        app:layout_constraintBottom_toTopOf="@+id/backButton"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/patienceView"
        app:layout_constraintVertical_bias="0.0" />

    <TextView
        android:id="@+id/errorView"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="16dp"
        android:layout_marginTop="32dp"
        android:layout_marginEnd="16dp"
        android:textColor="?android:colorError"
        android:textSize="18sp"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/patienceView"
        app:layout_constraintVertical_bias="0.0"
        tools:text="@string/storage_check_fragment_backup_error"
        tools:visibility="visible" />

    <Button
        android:id="@+id/backButton"
        style="@style/ActionPrimaryButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="16dp"
        android:text="@string/storage_check_fragment_error_button"
        android:visibility="invisible"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:visibility="visible" />

</androidx.constraintlayout.widget.ConstraintLayout>