activity_singlepage.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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clipChildren="false">

    <com.ziwenl.library.GravityRotationImageView
        android:id="@+id/iv_back"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:paddingBottom="40dp"
        android:src="@mipmap/banner_a_back"
        app:isBack="true"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:background="@color/cardview_dark_background"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/iv_back">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="底部内容显示区域"
            android:textColor="@color/white"
            android:textSize="22sp" />
    </FrameLayout>

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="20dp"
        android:clipChildren="false"
        app:layout_constraintBottom_toBottomOf="@+id/iv_back"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <ImageView
            android:id="@+id/iv_middle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/banner_a_middle" />


        <com.ziwenl.library.GravityRotationImageView
            android:id="@+id/iv_front"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@mipmap/banner_a_front" />

    </FrameLayout>


</androidx.constraintlayout.widget.ConstraintLayout>