ListView: Talkback can't reach offscreen elements if a view is pushed and then popped #40419
Description
Steps to Reproduce
With talkback on:
- Create a
ListViewwith some elements - Push a new Widget using
MaterialPageRouteand then pop it - Elements not visible on the screen cannot be reached by talkback.
Tried on a Nexus 5x.
On iOS/Voiceover it seems to work correctly.
Here's a basic example:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Material App',
theme: ThemeData.dark(),
home: MyHomePage(title: 'how are you',),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: ListView.builder(
itemCount: 100,
itemBuilder: (context, index) {
return ListTile(
title: Text('Item $index'),
onTap: () {
Navigator.of(context).push(
MaterialPageRoute(
builder: (context) => PushedPage(),
),
);
},
);
},
),
);
}
}
class PushedPage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Pushed page'),
),
);
}
}
Flutter analyze output
Analyzing flutter_app1...
No issues found! (ran in 14.4s)
Flutter doctor output
[✓] Flutter (Channel stable, v1.9.1+hotfix.2, on Mac OS X 10.14.6 18G95, locale it-IT)
• Flutter version 1.9.1+hotfix.2 at /Users/lorenzooliveto/Flutter/flutter
• Framework revision 2d2a1ffec9 (6 days ago), 2019-09-06 18:39:49 -0700
• Engine revision b863200c37
• Dart version 2.5.0
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
• Android SDK at /Users/lorenzooliveto/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 28.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 10.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 10.3, Build version 10G8
• CocoaPods version 1.7.5
[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 39.0.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] Connected device (1 available)
• Nexus 5X • 00953f3bb077bb69 • android-arm64 • Android 8.1.0 (API 27)
• No issues found!
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Critical issues such as a build break or regressionAccessibility, e.g. VoiceOver or TalkBack. (aka a11y)Various Google teamsViewports, list views, slivers, etc.Found to occur in 1.22flutter/packages/flutter repository. See also f: labels.The issue has been confirmed reproducible and is ready to work onAndroid applications specificallyIssue is closed as already fixed in a newer versionA fix is in flight