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="avatarClickListener"
            type="View.OnClickListener" />
        <variable
            name="viewModel"
            type="org.linphone.ui.viewmodel.TopBarViewModel" />
    </data>

    <!-- Background color here is mandatory for transparency effect on child views -->
    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/primary_color"
        tools:context=".ui.MainActivity">

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

            <androidx.drawerlayout.widget.DrawerLayout
                android:id="@+id/side_menu"
                android:layout_width="match_parent"
                android:layout_height="0dp"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintBottom_toBottomOf="parent">

                <androidx.fragment.app.FragmentContainerView
                    android:id="@+id/main_nav_host_fragment"
                    android:name="androidx.navigation.fragment.NavHostFragment"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    app:defaultNavHost="true"
                    app:navGraph="@navigation/main_nav_graph"/>

                    <!-- Side Menu -->
                    <RelativeLayout
                        android:id="@+id/side_menu_content"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        android:background="@color/white"
                        android:layout_gravity="left">

                        <!-- TODO -->

                    </RelativeLayout>

            </androidx.drawerlayout.widget.DrawerLayout>

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

</layout>