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인프런 영문 브랜드 로고

인프런 커뮤니티 질문&답변

milkboy2564님의 프로필 이미지
milkboy2564

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Flutter 입문 - 안드로이드, iOS 개발을 한 번에 (with Firebase)

오류

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강의 듣다가 아래와 같은 오류가 발생하고 에뮬레이터 상에서 사진처럼 저런 에러가 발생했습니다

저 부분 말고 나머지 기능은 전부 다 실행이 되는데 어떻게 해결해야 될까요..

구글링을 해봐도 해결방법을 모르겠어서 남깁니다 ㅠ

══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════

The following assertion was thrown building:

'package:flutter/src/painting/_network_image_io.dart': Failed assertion: line 26 pos 14: 'url !=

null': is not true.

Either the assertion indicates an error in the framework itself, or we should provide substantially

more information in this error message to help you determine and fix the underlying cause.

In either case, please report this assertion by filing a bug on GitHub:

  https://github.com/flutter/flutter/issues/new?template=BUG.md

When the exception was thrown, this was the stack:

#2      new NetworkImage (package:flutter/src/painting/_network_image_io.dart:26:14)

#3      new Image.network (package:flutter/src/widgets/image.dart:404:68)

#4      _SearchPageState._buildListItem (package:instagram_clone/search_page.dart:65:24)

#5      _SearchPageState._buildBody.<anonymous closure>.<anonymous closure> (package:instagram_clone/search_page.dart:48:20)

#6      SliverChildBuilderDelegate.build (package:flutter/src/widgets/sliver.dart:448:22)

#7      SliverMultiBoxAdaptorElement._build.<anonymous closure> (package:flutter/src/widgets/sliver.dart:1136:67)

#8      _HashMap.putIfAbsent (dart:collection-patch/collection_patch.dart:140:29)

#9      SliverMultiBoxAdaptorElement._build (package:flutter/src/widgets/sliver.dart:1136:26)

#10     SliverMultiBoxAdaptorElement.createChild.<anonymous closure> (package:flutter/src/widgets/sliver.dart:1149:55)

#11     BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2620:19)

#12     SliverMultiBoxAdaptorElement.createChild (package:flutter/src/widgets/sliver.dart:1142:11)

#13     RenderSliverMultiBoxAdaptor._createOrObtainChild.<anonymous closure> (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:356:23)

#14     RenderObject.invokeLayoutCallback.<anonymous closure> (package:flutter/src/rendering/object.dart:1868:58)

#15     PipelineOwner._enableMutationsToDirtySubtrees (package:flutter/src/rendering/object.dart:920:15)

#16     RenderObject.invokeLayoutCallback (package:flutter/src/rendering/object.dart:1868:13)

#17     RenderSliverMultiBoxAdaptor._createOrObtainChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:345:5)

#18     RenderSliverMultiBoxAdaptor.insertAndLayoutChild (package:flutter/src/rendering/sliver_multi_box_adaptor.dart:491:5)

#19     RenderSliverGrid.performLayout (package:flutter/src/rendering/sliver_grid.dart:590:17)

#20     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#21     RenderSliverEdgeInsetsPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:137:11)

#22     RenderSliverPadding.performLayout (package:flutter/src/rendering/sliver_padding.dart:377:11)

#23     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#24     RenderViewportBase.layoutChildSequence (package:flutter/src/rendering/viewport.dart:471:13)

#25     RenderViewport._attemptLayout (package:flutter/src/rendering/viewport.dart:1465:12)

#26     RenderViewport.performLayout (package:flutter/src/rendering/viewport.dart:1374:20)

#27     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#28     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#29     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#30     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#31     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#32     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#33     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#34     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#35     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#36     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#37     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#38     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#39     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#40     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#41     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#42     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#43     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#44     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#45     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#46     MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:173:11)

#47     _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:495:7)

#48     MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:242:7)

#49     RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:401:14)

#50     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#51     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#52     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#53     RenderProxyBoxMixin.performLayout (package:flutter/src/rendering/proxy_box.dart:115:13)

#54     _RenderCustomClip.performLayout (package:flutter/src/rendering/proxy_box.dart:1269:11)

#55     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#56     RenderPositionedBox.performLayout (package:flutter/src/rendering/shifted_box.dart:396:13)

#57     RenderObject.layout (package:flutter/src/rendering/object.dart:1769:7)

#58     MultiChildLayoutDelegate.layoutChild (package:flutter/src/rendering/custom_layout.dart:173:11)

#59     _ScaffoldLayout.performLayout (package:flutter/src/material/scaffold.dart:495:7)

#60     MultiChildLayoutDelegate._callPerformLayout (package:flutter/src/rendering/custom_layout.dart:242:7)

#61     RenderCustomMultiChildLayoutBox.performLayout (package:flutter/src/rendering/custom_layout.dart:401:14)

#62     RenderObject._layoutWithoutResize (package:flutter/src/rendering/object.dart:1632:7)

#63     PipelineOwner.flushLayout (package:flutter/src/rendering/object.dart:889:18)

#64     RendererBinding.drawFrame (package:flutter/src/rendering/binding.dart:404:19)

#65     WidgetsBinding.drawFrame (package:flutter/src/widgets/binding.dart:867:13)

#66     RendererBinding._handlePersistentFrameCallback (package:flutter/src/rendering/binding.dart:286:5)

#67     SchedulerBinding._invokeFrameCallback (package:flutter/src/scheduler/binding.dart:1117:15)

#68     SchedulerBinding.handleDrawFrame (package:flutter/src/scheduler/binding.dart:1056:9)

#69     SchedulerBinding._handleDrawFrame (package:flutter/src/scheduler/binding.dart:972:5)

#73     _invoke (dart:ui/hooks.dart:253:10)

#74     _drawFrame (dart:ui/hooks.dart:211:3)

(elided 5 frames from class _AssertionError and dart:async)

════════════════════════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════

The following assertion was thrown building:

'package:flutter/src/painting/_network_image_io.dart': Failed assertion: line 26 pos 14: 'url != null': is not true.

Either the assertion indicates an error in the framework itself, or we should provide substantially more information in this error message to help you determine and fix the underlying cause.

In either case, please report this assertion by filing a bug on GitHub:

  https://github.com/flutter/flutter/issues/new?template=BUG.md

When the exception was thrown, this was the stack: 

#2      new NetworkImage (package:flutter/src/painting/_network_image_io.dart:26:14)

#3      new Image.network (package:flutter/src/widgets/image.dart:404:68)

#4      _SearchPageState._buildListItem (package:instagram_clone/search_page.dart:65:24)

#5      _SearchPageState._buildBody.<anonymous closure>.<anonymous closure> (package:instagram_clone/search_page.dart:48:20)

#6      SliverChildBuilderDelegate.build (package:flutter/src/widgets/sliver.dart:448:22)

...

════════════════════════════════════════════════════════════════════════════════════════════════════

Flutteriosandroid

답변 3

1

오준석님의 프로필 이미지
오준석
지식공유자

검색해 보니 minSdkVersion 21 이상으로 설정하면 해당 에러가 사라지는 것 같습니다.

https://stackoverflow.com/questions/61732409/plugin-project-firebase-core-web-not-found

0

milkboy2564님의 프로필 이미지
milkboy2564
질문자

해결했습니다! 

마지막으로 하나만 더 질문하려고하는데 

Plugin project :firebase_core_web not found. Please update settings.gradle.

Plugin project :cloud_firestore_web not found. Please update settings.gradle.

위 문장은 gradle 업데이트해주면 되는건가요?

0

오준석님의 프로필 이미지
오준석
지식공유자

에러메시지를 보면 url 에 null 값이 들어있는 것으로 보입니다.

DB에 이미지 url 값이 없는지 확인해 보시고 원인을 찾으셔야 할 듯 하네요.

milkboy2564님의 프로필 이미지
milkboy2564

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