override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val navView = findViewById(R.id.nav_view)

    navView.setItemStyle(MaterialNavigationView.ITEM_STYLE_ROUND_RIGHT)
    navView.setItemStyle(MaterialNavigationView.ITEM_STYLE_ROUND_RECTANGLE)
}