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">

    <LinearLayout
        android:id="@+id/loading_content"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

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

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

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

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

    </LinearLayout>

    <RelativeLayout
        android:id="@+id/emptyLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:visibility="gone"
        tools:visibility="visible">

        <ImageView
            android:id="@+id/empty_list_icon"
            android:layout_width="match_parent"
            android:layout_height="72dp"
            android:contentDescription="@string/nc_app_product_name"
            android:src="@drawable/ic_logo"
            app:tint="#989898" />

        <TextView
            android:id="@+id/empty_list_view_headline"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/empty_list_icon"
            android:layout_gravity="center_horizontal"
            android:ellipsize="end"
            android:gravity="center"
            android:maxLines="2"
            android:paddingTop="@dimen/standard_padding"
            android:paddingBottom="@dimen/standard_half_padding"
            android:text="@string/nc_conversations_empty"
            android:textAlignment="center"
            android:textColor="@color/conversation_item_header"
            android:textSize="22sp" />

        <TextView
            android:id="@+id/empty_list_view_text"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@id/empty_list_view_headline"
            android:layout_gravity="center_horizontal"
            android:ellipsize="end"
            android:gravity="center"
            android:paddingTop="@dimen/standard_half_padding"
            android:paddingBottom="@dimen/standard_half_padding"
            android:text="@string/nc_conversations_empty_details"
            android:textAlignment="center"
            android:textColor="@color/textColorMaxContrast"
            android:textSize="16sp" />
    </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" />

        </FrameLayout>

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <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"
        android:contentDescription="@string/nc_new_conversation"
        app:borderWidth="0dp"
        app:srcCompat="@drawable/ic_add_white_24px"
        app:tint="@color/white"
        app:backgroundTint="@color/colorPrimary"/>

    <com.nextcloud.ui.popupbubble.PopupBubble
        android:id="@+id/newMentionPopupBubble"
        android:theme="@style/Button.Primary"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|center"
        android:layout_marginStart="88dp"
        android:layout_marginTop="16dp"
        android:layout_marginEnd="88dp"
        android:layout_marginBottom="16dp"
        android:minHeight="@dimen/min_size_clickable_area"
        android:text="@string/nc_new_mention"
        app:background="@color/colorPrimary"
        app:cornerRadius="@dimen/button_corner_radius"
        app:icon="@drawable/ic_baseline_arrow_downward_24px" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>