nextcloud-talk-android/app/src/main/res/layout/controller_conversations_rv.xml

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Nextcloud Talk application
  ~
  ~ @author Mario Danic
  ~ Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.com>
  ~
  ~ This program is free software: you can redistribute it and/or modify
  ~ it under the terms of the GNU General Public License as published by
  ~ the Free Software Foundation, either version 3 of the License, or
  ~ at your option) any later version.
  ~
  ~ This program is distributed in the hope that it will be useful,
  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of
  ~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  ~ GNU General Public License for more details.
  ~
  ~ You should have received a copy of the GNU General Public License
  ~ along with this program.  If not, see <http://www.gnu.org/licenses/>.
  -->

<androidx.coordinatorlayout.widget.CoordinatorLayout 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/generic_rv_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ProgressBar
        android:id="@+id/progressBar"
        android:layout_width="@dimen/item_height"
        android:layout_height="@dimen/item_height"
        android:layout_gravity="center"
        android:layout_marginStart="@dimen/activity_horizontal_margin"
        android:layout_marginLeft="@dimen/activity_horizontal_margin"
        android:layout_marginEnd="@dimen/activity_horizontal_margin"
        android:layout_marginRight="@dimen/activity_horizontal_margin"
        android:indeterminate="true"
        android:indeterminateTint="@color/colorPrimary"
        android:indeterminateTintMode="src_in" />

    <RelativeLayout
        android:id="@+id/emptyLayout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone">

        <ImageView
            android:id="@+id/noConversationsImageView"
            android:layout_width="72dp"
            android:layout_height="72dp"
            android:layout_centerInParent="true"
            android:src="@drawable/ic_logo"
            android:tint="@color/colorPrimary" />

        <TextView
            android:id="@+id/sendHiTextView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/noConversationsImageView"
            android:layout_margin="8dp"
            android:text="@string/nc_conversations_empty"
            android:textAlignment="center"
            android:textSize="20sp" />
    </RelativeLayout>

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout
        android:id="@+id/swipeRefreshLayoutView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:visibility="gone"
        app:layout_behavior="com.nextcloud.talk.utils.FABAwareScrollingViewBehavior">

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <androidx.recyclerview.widget.RecyclerView
                android:id="@+id/recycler_view"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                tools:listitem="@layout/rv_item_conversation" />

        </FrameLayout>

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <include layout="@layout/fast_scroller" />

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|end"
        android:layout_margin="16dp"
        app:srcCompat="@drawable/ic_add_white_24px" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>