fragment_channels.xml

<!-- android/app/src/main/res/layout/fragment_channels.xml:1 -->
<?xml version="1.0" encoding="utf-8"?>
<layout 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">


    <data>

        <variable
            name="viewModel"
            type="com.getstream.sdk.chat.viewmodel.ChannelListViewModel" />
    </data>

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".ChannelsFragment">


        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context="com.example.chattutorial.MainActivity">


            <com.getstream.sdk.chat.view.ChannelListView
                android:id="@+id/channelList"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                android:layout_marginBottom="10dp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:streamReadStateAvatarHeight="15dp"
                app:streamReadStateAvatarWidth="15dp"
                app:streamReadStateTextSize="9sp"
                app:streamShowReadState="true" />

            <ProgressBar
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:isGone="@{!safeUnbox(viewModel.loading)}"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <ProgressBar
                android:layout_width="25dp"
                android:layout_height="25dp"
                android:layout_marginBottom="16dp"
                app:isGone="@{!safeUnbox(viewModel.loadingMore)}"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <com.google.android.material.floatingactionbutton.FloatingActionButton
            android:id="@+id/new_channel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="end|bottom"
            android:layout_margin="16dp"
            android:src="@drawable/ic_add_white_24dp" />
    </FrameLayout>
</layout>