BottomSheetBehavior 不起作用如何解决？

如何解决BottomSheetBehavior 不起作用如何解决？

我正在观看来自 Udemy 的关于使用 BottomSheetBehavior 的教程视频，但它无法正常工作，只是像图片中那样保持静止。我已经添加了新的 android X 版本的 BottomSheetBehavior 并且只是按照教程中的步骤操作。任何人都可以帮助我为什么它不起作用？

activity_main

<?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"
    tools:context=".MainActivity">


    <include layout="@layout/content_main"/>
    <include layout="@layout/bottom_sheet"/>

</androidx.constraintlayout.widget.ConstraintLayout>

Bottom_Sheet

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/bottom_sheet"
    android:background="@android:color/white"
    android:orientation="vertical"
    app:behavior_hideable="false"
    app:behavior_peekHeight="74dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

    <View
        android:layout_width="match_parent"
        android:layout_height="2dp"
        android:background="@android:color/darker_gray" />

    <FrameLayout
        android:id="@+id/bottom_sheet_button"
        android:layout_width="match_parent"
        android:layout_height="56dp"
        android:layout_margin="8dp"
        android:background="@color/black">

        <ImageView
            android:id="@+id/bottom_sheet_button_image"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:src="@android:drawable/ic_menu_camera" />

        <ProgressBar
            android:id="@+id/bottom_sheet_button_progress"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:visibility="gone"/>

    </FrameLayout>

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/bottom_sheet_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

content_main

<?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"
    android:background="#eee"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context=".MainActivity"
    tools:showIn="@layout/activity_main">

    <FrameLayout
        android:id="@+id/face_detection_camera_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

    <com.otaliastudios.cameraview.Cameraview
        android:id="@+id/face_detection_camera_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <ImageView
        android:id="@+id/face_detection_camera_image_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="centerCrop" />

    <Button
        android:id="@+id/face_detection_camera_toggle_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="top|end"
        android:layout_margin="8dp"
        android:text="toggle" />
    </FrameLayout>

    <ImageView
        android:id="@+id/face_detection_image_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="90dp"
        android:layout_marginEnd="16dp"
        android:layout_marginStart="16dp"
        android:layout_marginTop="16dp"
        android:scaleType="fitCenter"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


</androidx.constraintlayout.widget.ConstraintLayout>