ANR may occur when used with apps that provide document providers #146

import 'package:flutter/material.dart';
import 'package:shared_storage/shared_storage.dart' as saf;
void main() {
 runApp(const MyApp());
}
class MyApp extends StatelessWidget {
 const MyApp({super.key});
 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 title: 'Flutter Demo',
 theme: ThemeData(
 colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
 useMaterial3: true,
 ),
 home: const MyHomePage(title: 'Flutter Demo Home Page'),
 );
 }
}
class MyHomePage extends StatefulWidget {
 const MyHomePage({super.key, required this.title});
 final String title;
 @override
 State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
 Uri? selectUri;
 String answer = '';
 void openDocumentTree() => saf.openDocumentTree().then((value) {
 setState(() {
 selectUri = value;
 });
 });
 void canRead(Uri? uri) => saf.canRead(uri ?? Uri()).then((value) {
 setState(() {
 answer = value.toString();
 });
 });
 void exists(Uri? uri) => saf.exists(uri ?? Uri()).then((value) {
 setState(() {
 answer = value.toString();
 });
 });
 
 @override
 Widget build(BuildContext context) {
 return Scaffold(
 appBar: AppBar(
 backgroundColor: Theme.of(context).colorScheme.inversePrimary,
 title: Text(widget.title),
 ),
 body: Center(
 child: Column(
 mainAxisAlignment: MainAxisAlignment.center,
 children: <Widget>[
 Text(
 'uri: ${selectUri.toString()}',
 style: Theme.of(context).textTheme.headlineLarge,
 ),
 Text(
 'answer: $answer',
 style: Theme.of(context).textTheme.headlineLarge,
 ),
 const SizedBox(height: 200,),
 FilledButton(
 onPressed: () => openDocumentTree(),
 child: Text('openDocumentTree',
 style: Theme.of(context).textTheme.bodyMedium,)),
 FilledButton(
 onPressed: () => canRead(selectUri),
 child: Text('canRead',
 style: Theme.of(context).textTheme.bodyMedium,)),
 FilledButton(
 onPressed: () => exists(selectUri),
 child: Text('exists',
 style: Theme.of(context).textTheme.bodyMedium,))
 ],
 ),
 ),
 );
 }
}