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

<?xml version="1.0" encoding="utf-8"?><!--
  ~ Nextcloud Talk application
  ~
  ~ @author Mario Danic
  ~ @author Andy Scherzinger
  ~ Copyright (C) 2021 Andy Scherzinger <info@andy-scherzinger.de>
  ~ Copyright (C) 2017-2019 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/>.
  -->

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/callStateRelativeLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <ImageView
        android:id="@+id/errorImageView"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_above="@id/callStateTextView"
        android:layout_centerHorizontal="true"
        android:contentDescription="@null"
        android:src="@drawable/ic_signal_wifi_off_white_24dp"
        android:visibility="gone" />

    <ProgressBar
        android:id="@+id/callStateProgressBar"
        android:layout_width="@dimen/item_height"
        android:layout_height="@dimen/item_height"
        android:layout_above="@id/callStateTextView"
        android:layout_centerHorizontal="true"
        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" />

    <TextView
        android:id="@+id/callStateTextView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:layout_margin="16dp"
        android:gravity="center"
        android:text="@string/nc_connecting_call"
        android:textAlignment="center"
        android:textColor="@color/white" />

</RelativeLayout>