flutter bottom navigation bar vs bottom app bar code example

Example: android bootom app bar tab bar

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/coordinator_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white"
android:fitsSystemWindows="false">



<com.google.android.material.bottomappbar.BottomAppBar
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/bottom_bar"
    android:clickable="false"
    app:fabAlignmentMode="center"
    android:layout_gravity="bottom"/>

<FrameLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="bottom">

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_navigation"
        android:layout_width="match_parent"
        android:clickable="false"
        android:layout_height="wrap_content"
        app:menu="@menu/bottom_menu" />
</FrameLayout>

<FloatingActionButton
    android:id="@+id/fab"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:layout_anchor="@id/bottom_bar"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>