SecurityDefenseDevice/app/src/main/res/layout/face_verification_activity.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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".login.FaceVerificationActivity">
    <androidx.camera.view.PreviewView
        android:id="@+id/previewView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.example.defenseapplication.view.FaceOverlayView
        android:id="@+id/overlay"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <View
        android:id="@+id/statusBarPlaceholder"
        android:layout_width="match_parent"
        android:layout_height="36dp"
        android:background="#26000000"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@+id/topContainer" />

    <androidx.constraintlayout.widget.ConstraintLayout
        android:id="@+id/topContainer"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:paddingStart="16dp"
        android:paddingTop="8dp"
        android:paddingEnd="16dp"
        android:paddingBottom="8dp"
        app:layout_constraintTop_toBottomOf="@id/statusBarPlaceholder"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <ImageView
            android:id="@+id/backIcon"
            android:layout_width="24dp"
            android:layout_height="24dp"
            android:contentDescription="@null"
            android:src="@drawable/ic_back_arrow"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/tvTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/face_collection"
            android:textColor="@android:color/white"
            android:textSize="22sp"
            android:textStyle="bold"
            app:layout_constraintBottom_toBottomOf="@id/backIcon"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="@id/backIcon" />

    </androidx.constraintlayout.widget.ConstraintLayout>

    <LinearLayout
        android:id="@+id/hintContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal"
        android:paddingStart="16dp"
        android:paddingEnd="16dp"
        app:layout_constraintBottom_toTopOf="@id/bottomContainer"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <ImageView
            android:layout_width="12dp"
            android:layout_height="12dp"
            android:layout_marginEnd="8dp"
            android:contentDescription="@null"
            android:src="@drawable/ic_red_dot" />

        <TextView
            android:id="@+id/tvFaceHint"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/face_in_circle"
            android:textColor="@android:color/white"
            android:textSize="20sp"
            android:textStyle="bold"
            android:letterSpacing="0.03" />

    </LinearLayout>

    <LinearLayout
        android:id="@+id/bottomContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:paddingHorizontal="24dp"
        android:paddingTop="20dp"
        android:paddingBottom="28dp"
        android:background="@drawable/bg_bottom_gradient"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

    <android.widget.Button
        android:id="@+id/btnCaptureFace"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:text="@string/collect_face"
        android:textAllCaps="false"
        android:textSize="17sp"
        android:textStyle="bold"
        android:background="@drawable/bg_capture_face_button"
        android:textColor="#F2FFFFFF" />
    </LinearLayout>

    <ProgressBar
        android:id="@+id/progressBar"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:visibility="gone"
        android:background="#AA000000"
        android:indeterminateTint="@color/white"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>