======== Exception caught by widgets library ======================================================= The following ProviderNotFoundException was thrown building TweetWidget(dirty): Error: Could not find the correct Provider above this TweetWidget Widget

This happens because you used a BuildContext that does not include the provider of your choice. There are a few common scenarios:

You added a new provider in your main.dart and performed a hot-reload. To fix, perform a hot-restart.
The provider you are trying to read is in a different route.

Providers are "scoped". So if you insert of provider inside a route, then other routes will not be able to access that provider.

You used a BuildContext that is an ancestor of the provider you are trying to read.

Make sure that TweetWidget is under your MultiProvider/Provider. This usually happens when you are creating a provider and trying to read it immediately.

For example, instead of:

Widget build(BuildContext context) {
return Provider<Example>(
  create: (_) => Example(),
  // Will throw a ProviderNotFoundError, because `context` is associated
  // to the widget that is the parent of `Provider<Example>`
  child: Text(context.watch<Example>()),
),
}

consider using builder like so:

Widget build(BuildContext context) {
return Provider<Example>(
  create: (_) => Example(),
  // we use `builder` to obtain a new `BuildContext` that has access to the provider
  builder: (context) {
    // No longer throws
    return Text(context.watch<Example>()),
  }
),
}

If none of these solutions work, consider asking for help on StackOverflow: https://stackoverflow.com/questions/tagged/flutter

The relevant error-causing widget was: TweetWidget TweetWidget:file:///E:/develop/projects/hacklab/flutter/TwitterClient/lib/pages/timeline_page.dart:42:52 When the exception was thrown, this was the stack:

0 Provider._inheritedElementOf (package:provider/src/provider.dart:356:7)

1 Provider.of (package:provider/src/provider.dart:293:30)

2 WatchContext.watch (package:provider/src/provider.dart:700:21)

3 TweetWidget.build (package:twitter_test/widgets/TweetWidget.dart:76:59)

4 StatelessElement.build (package:flutter/src/widgets/framework.dart:4876:49)

5 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4806:15)

6 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

7 ComponentElement._firstBuild (package:flutter/src/widgets/framework.dart:4787:5)

8 ComponentElement.mount (package:flutter/src/widgets/framework.dart:4781:5)

9 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3817:16)

10 MultiChildRenderObjectElement.inflateWidget (package:flutter/src/widgets/framework.dart:6350:36)

11 Element.updateChild (package:flutter/src/widgets/framework.dart:3551:18)

12 RenderObjectElement.updateChildren (package:flutter/src/widgets/framework.dart:5883:32)

13 MultiChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6375:17)

14 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

15 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

16 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

17 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

18 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

19 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

20 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

21 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

22 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

23 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

24 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

25 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

26 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4977:11)

27 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

28 StatefulElement.update (package:flutter/src/widgets/framework.dart:5009:5)

29 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

30 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

31 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

32 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

33 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

34 ProxyElement.update (package:flutter/src/widgets/framework.dart:5154:5)

35 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

36 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

37 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

38 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

39 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

40 ProxyElement.update (package:flutter/src/widgets/framework.dart:5154:5)

41 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

42 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

43 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

44 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

45 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

46 SingleChildRenderObjectElement.update (package:flutter/src/widgets/framework.dart:6222:14)

47 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

48 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

49 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

50 ProxyElement.update (package:flutter/src/widgets/framework.dart:5154:5)

51 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

52 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

53 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4977:11)

54 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

55 StatefulElement.update (package:flutter/src/widgets/framework.dart:5009:5)

56 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

57 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

58 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4977:11)

59 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

60 StatefulElement.update (package:flutter/src/widgets/framework.dart:5009:5)

61 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

62 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

63 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

64 ProxyElement.update (package:flutter/src/widgets/framework.dart:5154:5)

65 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

66 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

67 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

68 StatelessElement.update (package:flutter/src/widgets/framework.dart:4883:5)

69 Element.updateChild (package:flutter/src/widgets/framework.dart:3530:15)

70 ComponentElement.performRebuild (package:flutter/src/widgets/framework.dart:4832:16)

71 StatefulElement.performRebuild (package:flutter/src/widgets/framework.dart:4977:11)

72 Element.rebuild (package:flutter/src/widgets/framework.dart:4529:5)

73 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2659:19)

74 WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:891:21)

75 RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:370:5)

76 SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1146:15)

77 SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1083:9)

78 SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:997:5)

82 _invoke (dart:ui/hooks.dart:151:10)

83 PlatformDispatcher._drawFrame (dart:ui/platform_dispatcher.dart:308:5)

84 _drawFrame (dart:ui/hooks.dart:115:31)

(elided 3 frames from dart:async)

Widget build(BuildContext context) { return Provider<Example>( create: (_) => Example(), // Will throw a ProviderNotFoundError, because `context` is associated // to the widget that is the parent of `Provider<Example>` child: Text(context.watch<Example>()), ), }

Widget build(BuildContext context) { return Provider<Example>( create: (_) => Example(), // we use `builder` to obtain a new `BuildContext` that has access to the provider builder: (context) { // No longer throws return Text(context.watch<Example>()), } ), }

ZOI-dayo / TwitterClient

TweetWidgetの表示時にエラー #26