linphone-android/app/src/main/res/layout/call_outgoing_activity.xml

<?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>
        <import type="android.view.View" />
        <variable
            name="toggleMicrophoneClickListener"
            type="android.view.View.OnClickListener" />
        <variable
            name="toggleSpeakerClickListener"
            type="android.view.View.OnClickListener" />
        <variable
            name="terminateCallClickListener"
            type="android.view.View.OnClickListener" />
        <variable
            name="viewModel"
            type="org.linphone.activities.call.viewmodels.CallViewModel" />
        <variable
            name="controlsViewModel"
            type="org.linphone.activities.call.viewmodels.ControlsViewModel" />
    </data>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="?attr/backgroundColor">

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/status_fragment"
            android:name="org.linphone.activities.call.fragments.StatusFragment"
            android:layout_width="match_parent"
            android:layout_height="40dp"
            android:layout_alignParentTop="true"
            tools:layout="@layout/call_status_fragment" />

        <RelativeLayout
            android:id="@+id/top_bar"
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_below="@id/status_fragment"
            android:background="?attr/lightToolbarBackgroundColor">

            <TextView
                style="@style/toolbar_title_font"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:gravity="center"
                android:text="@string/call_outgoing_title" />

        </RelativeLayout>

        <TextView
            android:id="@+id/contact_name"
            android:text="@{viewModel.contact.fullName ?? viewModel.displayName}"
            style="@style/big_contact_name_font"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/top_bar"
            android:layout_centerHorizontal="true"
            android:gravity="center_vertical|center_horizontal"
            android:paddingTop="5dp" />

        <org.linphone.views.MarqueeTextView
            android:id="@+id/contact_number"
            android:text="@{viewModel.address}"
            style="@style/sip_uri_font"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/contact_name"
            android:layout_centerHorizontal="true"
            android:layout_gravity="center_vertical|center_horizontal"
            android:singleLine="true"
            android:paddingBottom="10dp" />

        <org.linphone.contact.BigContactAvatarView
            android:id="@+id/avatar"
            android:layout_width="200dp"
            android:layout_height="200dp"
            android:layout_margin="5dp"
            android:layout_below="@id/contact_number"
            android:layout_centerHorizontal="true"
            android:gravity="center"
            tools:layout="@layout/contact_avatar_big"
            app:viewModel="@{viewModel}"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="60dp"
            android:layout_alignParentLeft="true"
            android:layout_alignParentBottom="true"
            android:orientation="horizontal">

            <ImageView
                android:onClick="@{toggleMicrophoneClickListener}"
                android:selected="@{controlsViewModel.isMicrophoneMuted}"
                android:contentDescription="@{controlsViewModel.isMicrophoneMuted ? @string/content_description_disable_mic_mute : @string/content_description_enable_mic_mute}"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="?attr/button_background_drawable"
                android:padding="10dp"
                android:src="@drawable/micro" />

            <ImageView
                android:onClick="@{toggleSpeakerClickListener}"
                android:selected="@{controlsViewModel.isSpeakerSelected}"
                android:contentDescription="@{controlsViewModel.isSpeakerSelected ? @string/content_description_disable_speaker : @string/content_description_enable_speaker}"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:background="?attr/button_background_drawable"
                android:padding="15dp"
                android:src="@drawable/speaker" />

            <ImageView
                android:onClick="@{terminateCallClickListener}"
                android:contentDescription="@string/content_description_terminate_call"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_weight="0.7"
                android:background="@drawable/call_hangup_background"
                android:padding="12dp"
                android:src="@drawable/call_hangup" />

        </LinearLayout>

    </RelativeLayout>

</layout>