c-brain-glass/app/src/main/res/layout/activity_chat.xml

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

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/baseRecyclerView"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            android:layout_width="match_parent"
            android:layout_height="400dp"
            android:background="@drawable/bg_chat"
            android:overScrollMode="never" />
        <ProgressBar
            android:id="@+id/pb"
            app:layout_constraintTop_toBottomOf="@+id/baseRecyclerView"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintBottom_toBottomOf="@+id/baseRecyclerView"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:indeterminateDrawable="@drawable/load_progress" />

        <TextView
            android:id="@+id/hint1"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:gravity="center"
            android:text='滚动翻页'
            android:textColor="#ff40FF5E"
            android:textSize="14sp"
            app:layout_constraintEnd_toStartOf="@+id/hint2"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toBottomOf="@+id/baseRecyclerView" />
        <TextView
            android:id="@+id/hint2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginTop="12dp"
            android:gravity="center"
            android:text='双击退出'
            android:textColor="#ff40FF5E"
            android:textSize="14sp"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/hint1"
            app:layout_constraintTop_toBottomOf="@+id/baseRecyclerView" />

    </androidx.constraintlayout.widget.ConstraintLayout>
</layout>