[Android] Avoid hidden navigation bar icons #105716
Description
On Android APIs 26-28, when the navigation bar is set to be transparent and the navigation bar icons brightness is set to dark, the icons become invisible. This cannot be avoided by setting the systemNavigationBarContrastEnforced since this is not available until API 29 (see documentation). See the following reproduction:
Reproduction code:
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return const MaterialApp(
title: 'Disappearing NavBar Icons Example',
home: MyHomePage(),
);
}
}
class MyHomePage extends StatelessWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return const Scaffold(
body: AnnotatedRegion(
value: SystemUiOverlayStyle(
systemNavigationBarColor: Colors.transparent,
systemNavigationBarContrastEnforced: true, //Has no effect API 26-28, allowing this issue
systemNavigationBarIconBrightness: Brightness.light,
),
child: Center(child: Text('Disappearing NavBar Icons Example'))
)
);
}
}
Original issue: #90098.