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

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <data>
        <import type="android.view.View" />
        <variable
            name="viewModel"
            type="org.linphone.ui.main.viewmodel.MainViewModel" />
    </data>

    <androidx.drawerlayout.widget.DrawerLayout
        android:id="@+id/drawer_menu"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        tools:context=".ui.main.MainActivity">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <LinearLayout
                android:id="@+id/notifications_area"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:background="@{viewModel.showAlert ? (viewModel.maxAlertLevel >= 10 ? @drawable/color_danger_500 : @drawable/color_main_activity_top_bar) : (viewModel.pendingFilesOrTextSharing ? @drawable/color_main_activity_top_bar : (viewModel.atLeastOneCall ? @drawable/color_success_500 : @drawable/color_main1_500)), default=@drawable/color_main1_500}"
                app:layout_constraintTop_toTopOf="parent">

                <include
                    android:id="@+id/alerts_top_bar"
                    layout="@layout/main_activity_alert_top_bar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="@{viewModel.showAlert ? View.VISIBLE : View.GONE, default=gone}"
                    app:viewModel="@{viewModel}"/>

                <include
                    android:id="@+id/file_sharing_top_bar"
                    layout="@layout/main_activity_pending_sharing_top_bar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="@{viewModel.pendingFilesOrTextSharing ? View.VISIBLE : View.GONE, default=gone}"
                    app:viewModel="@{viewModel}"/>

                <include
                    android:id="@+id/in_call_top_bar"
                    layout="@layout/main_activity_in_call_top_bar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:visibility="@{viewModel.atLeastOneCall ? View.VISIBLE : View.GONE, default=gone}"
                    app:viewModel="@{viewModel}"/>

            </LinearLayout>

            <androidx.fragment.app.FragmentContainerView
                android:id="@+id/main_nav_container"
                android:name="androidx.navigation.fragment.NavHostFragment"
                android:layout_width="0dp"
                android:layout_height="0dp"
                app:defaultNavHost="true"
                app:navGraph="@navigation/main_nav_graph"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toBottomOf="@id/notifications_area"
                app:layout_constraintBottom_toBottomOf="parent"/>

            <LinearLayout
                android:id="@+id/toasts_area"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:orientation="vertical"
                android:layout_marginTop="@dimen/toast_top_margin"
                android:layout_marginStart="15dp"
                android:layout_marginEnd="15dp"
                app:layout_constraintWidth_max="@dimen/toast_max_width"
                app:layout_constraintTop_toTopOf="@id/main_nav_container"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <!-- Side Menu -->
        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/drawer_menu_content"
            android:name="org.linphone.ui.main.fragment.DrawerMenuFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="?attr/color_main2_000"
            android:layout_gravity="start"
            app:layout="@layout/drawer_menu" />

    </androidx.drawerlayout.widget.DrawerLayout>

</layout>