Steps to Reproduce
Create a new project and have this pop-up box:
return showDialog<Null>(
context: context,
barrierDismissible: false, // user must tap button!
child: new AlertDialog(
title: new Text(title),
content: new SingleChildScrollView(
child: new ListBody(
children: <Widget>[
new Text(msg)
],
),
),
actions: <Widget>[
new FlatButton(
child: new Text('NO'),
onPressed: () {
//Navigator.pop(context, "CANCEL");
Navigator.maybePop(context, "CANCEL");
},
),
new FlatButton(
child: new Text('YES'),
onPressed: () {
//Navigator.pop(context, "OK");
Navigator.maybePop(context, "CANCEL");
},
),
],
),
).then((val){
return val;
});Once the cancel or OK button is clicked, it generates an error
Logs
E/flutter ( 4523): [ERROR:topaz/lib/tonic/logging/dart_error.cc(16)] Unhandled exception:
E/flutter ( 4523): type 'String' is not a subtype of type 'Null' of 'result' where
E/flutter ( 4523): String is from dart:core
E/flutter ( 4523): Null is from dart:core
E/flutter ( 4523):
E/flutter ( 4523): #0 _ModalRoute&TransitionRoute&LocalHistoryRoute.didPop (package:flutter/src/widgets/routes.dart)
E/flutter ( 4523): #1 NavigatorState.pop (package:flutter/src/widgets/navigator.dart:1683:15)
E/flutter ( 4523): #2 NavigatorState.maybePop (package:flutter/src/widgets/navigator.dart:1648:9)
E/flutter ( 4523): <asynchronous suspension>
E/flutter ( 4523): #3 Navigator.maybePop (package:flutter/src/widgets/navigator.dart:1024:34)
E/flutter ( 4523): #4 showMainFrameDialogWithCancel.<anonymous closure> (package:myapp/src/util/ScreenUtils.dart:1334:23)
E/flutter ( 4523): #5 _InkResponseState._handleTap (package:flutter/src/material/ink_well.dart:490:14)
E/flutter ( 4523): #6 _InkResponseState.build.<anonymous closure> (package:flutter/src/material/ink_well.dart:545:30)
E/flutter ( 4523): #7 GestureRecognizer.invokeCallback (package:flutter/src/gestures/recognizer.dart:102:24)
E/flutter ( 4523): #8 TapGestureRecognizer._checkUp (package:flutter/src/gestures/tap.dart:161:9)
E/flutter ( 4523): #9 TapGestureRecognizer.handlePrimaryPointer (package:flutter/src/gestures/tap.dart:94:7)
E/flutter ( 4523): #10 PrimaryPointerGestureRecognizer.handleEvent (package:flutter/src/gestures/recognizer.dart:315:9)
E/flutter ( 4523): #11 PointerRouter._dispatch (package:flutter/src/gestures/pointer_router.dart:73:12)
E/flutter ( 4523): #12 PointerRouter.route (package:flutter/src/gestures/pointer_router.dart:101:11)
E/flutter ( 4523): #13 _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent (package:flutter/src/gestures/binding.dart:143:19)
E/flutter ( 4523): #14 _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (package:flutter/src/gestures/binding.dart:121:22)
E/flutter ( 4523): #15 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerEvent (package:flutter/src/gestures/binding.dart:101:7)
E/flutter ( 4523): #16 _WidgetsFlutterBinding&BindingBase&GestureBinding._flushPointerEventQueue (package:flutter/src/gestures/binding.dart:64:7)
E/flutter ( 4523): #17 _WidgetsFlutterBinding&BindingBase&GestureBinding._handlePointerDataPacket (package:flutter/src/gestures/binding.dart:48:7)
E/flutter ( 4523): #18 _invoke1 (dart:ui/hooks.dart:134:13)
E/flutter ( 4523): #19 _dispatchPointerDataPacket (dart:ui/hooks.dart:91:5)
Flutter Doctor
[✓] Flutter (Channel dev, v0.3.0, on Mac OS X 10.13.4 17E199, locale en-PH)
• Flutter version 0.3.0 at /Users/macbook/Documents/flutter
• Framework revision c73b8a7cf6 (13 days ago), 2018-04-12 16:17:26 -0700
• Engine revision 8a6e64a8ef
• Dart version 2.0.0-dev.47.0.flutter-4126459025
[!] Android toolchain - develop for Android devices (Android SDK 26.0.3)
• Android SDK at /Users/macbook/Library/Android/sdk
• Android NDK at /Users/macbook/Library/Android/sdk/ndk-bundle
• Platform android-27, build-tools 26.0.3
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses
[✓] iOS toolchain - develop for iOS devices (Xcode 9.3)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 9.3, Build version 9E145
• ios-deploy 1.9.2
• CocoaPods version 1.3.1
[✓] Android Studio (version 2.3)
• Android Studio at /Applications/Android Studio.app/Contents
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_112-release-b06)
[✓] IntelliJ IDEA Community Edition (version 2017.2.5)
• IntelliJ at /Applications/IntelliJ IDEA CE.app
• Flutter plugin version 19.1
• Dart plugin version 172.4343.25
[!] VS Code (version 1.17.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Dart Code extension not installed; install from
https://marketplace.visualstudio.com/items?itemName=Dart-Code.dart-code
[✓] Connected devices (1 available)
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 7.0 (API 24) (emulator)
Steps to Reproduce
Create a new project and have this pop-up box:
Once the cancel or OK button is clicked, it generates an error
Logs
Flutter Doctor