Meshtastic-Android/app/src/main/res/layout/activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout 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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:id="@+id/mainActivityLayout">

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/appBarLayout"
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

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

                <com.google.android.material.appbar.MaterialToolbar
                    android:id="@+id/toolbar"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    style="@style/MyToolbar"
                    android:visibility="visible"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent">

                    <ImageView
                        android:id="@+id/appIconImageVIew"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:contentDescription="@string/application_icon"
                        android:scaleType="center"
                        android:scaleX="1.5"
                        android:scaleY="1.5"
                        app:srcCompat="@drawable/app_icon"
                        tools:layout_editor_absoluteX="16dp"
                        tools:layout_editor_absoluteY="18dp" />

                    <TextView
                        android:id="@+id/title"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginStart="8dp"
                        android:gravity="center"
                        android:minHeight="?actionBarSize"
                        android:padding="16dp"
                        android:text="@string/app_name"
                        android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />

                </com.google.android.material.appbar.MaterialToolbar>
            </androidx.constraintlayout.widget.ConstraintLayout>

            <com.google.android.material.tabs.TabLayout
                android:id="@+id/tab_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:tabGravity="fill"
                app:tabIconTint="@color/tab_color_selector"
                app:tabIndicatorColor="@color/selectedColor" />
        </com.google.android.material.appbar.AppBarLayout>

        <androidx.viewpager2.widget.ViewPager2
            android:id="@+id/pager"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior" />
    </androidx.coordinatorlayout.widget.CoordinatorLayout>
</FrameLayout>