When I try to build APK as the release version, I got a gray screen without nothing inside that in Flutter
the problem was because I used a Positioned widget inside some another Widget that makes a problem. after removing a Positioned widget in all screen that I used and build the app again everything works perfectly.
in --release
mode we can't see any log but in debug
mode after I read all log I see I had to remove the Positioned widget.
in --release
mode a gray screen is equal to red screen in debug
mode.
but I have not any red screen in debug
mode in this happen make hard for me debugging
and here is a log that I saw in debug mode:
I/flutter (12822): The following assertion was thrown while applying parent data.:
I/flutter (12822): Incorrect use of ParentDataWidget.
I/flutter (12822): The ParentDataWidget Positioned wants to apply ParentData of type StackParentData to a RenderObject,
I/flutter (12822): which has been set up to accept ParentData of incompatible type FlexParentData.
I/flutter (12822): Usually, this means that the Positioned widget has the wrong ancestor RenderObjectWidget. Typically,
I/flutter (12822): Positioned widgets are placed directly inside Stack widgets.
I/flutter (12822): The offending Positioned is currently placed inside a Column widget.
I/flutter (12822): The ownership chain for the RenderObject that received the incompatible parent data was:
I/flutter (12822): Opacity ← ControlledAnimation<Map<String, dynamic>> ← FadeAnimation ← Positioned ← Column ←
I/flutter (12822): Container ← _SingleChildViewport ← IgnorePointer-[GlobalKey#7bb01] ← Semantics ← _PointerListener ←
I/flutter (12822): ⋯
I/flutter (12822):
I/flutter (12822): When the exception was thrown, this was the stack:
I/flutter (12822): #0 RenderObjectElement._updateParentData.<anonymous closure> (package:flutter/src/widgets/framework.dart:5687:11)
I/flutter (12822): #1 RenderObjectElement._updateParentData (package:flutter/src/widgets/framework.dart:5703:6)
I/flutter (12822): #2 RenderObjectElement.attachRenderObject (package:flutter/src/widgets/framework.dart:5724:7)
I/flutter (12822): #3 RenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5418:5)
I/flutter (12822): #4 SingleChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5871:11)
I/flutter (12822): ... Normal element mounting (21 frames)
I/flutter (12822): #25 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3488:14)
I/flutter (12822): #26 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5989:32)
I/flutter (12822): ... Normal element mounting (115 frames)
I/flutter (12822): #141 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3488:14)
I/flutter (12822): #142 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5989:32)
I/flutter (12822): ... Normal element mounting (191 frames)
I/flutter (12822): #333 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3488:14)
I/flutter (12822): #334 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5989:32)
I/flutter (12822): ... Normal element mounting (360 frames)
I/flutter (12822): #694 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3488:14)
I/flutter (12822): #695 MultiChildRenderObjectElement.mount (package:flutter/src/widgets/framework.dart:5989:32)
I/flutter (12822): ... Normal element mounting (240 frames)
I/flutter (12822): #935 Element.inflateWidget (package:flutter/src/widgets/framework.dart:3488:14)
I/flutter (12822): #936 Element.updateChild (package:flutter/src/widgets/framework.dart:3256:18)
I/flutter (12822): #937 RenderObjectToWidgetElement._rebuild (package:flutter/src/widgets/binding.dart:1132:16)
I/flutter (12822): #938 RenderObjectToWidgetElement.mount (package:flutter/src/widgets/binding.dart:1103:5)
I/flutter (12822): #939 RenderObjectToWidgetAdapter.attachToRenderTree.<anonymous closure> (package:flutter/src/widgets/binding.dart:1045:17)
I/flutter (12822): #940 BuildOwner.buildScope (package:flutter/src/widgets/framework.dart:2618:19)
I/flutter (12822): #941 RenderObjectToWidgetAdapter.attachToRenderTree (package:flutter/src/widgets/binding.dart:1044:13)
I/flutter (12822): #942 WidgetsBinding.attachRootWidget (package:flutter/src/widgets/binding.dart:925:7)
I/flutter (12822): #943 WidgetsBinding.scheduleAttachRootWidget.<anonymous closure> (package:flutter/src/widgets/binding.dart:906:7)
I/flutter (12822): (elided 11 frames from class _RawReceivePortImpl, class _Timer, dart:async, and dart:async-patch)
I/flutter (12822): ════════════════════════════════════════════════════════════════════════════════════════════════════
Comments
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Mehrdad Dolatkhah over 1 year
when I try to build release apk I got this error:
* What went wrong: Execution failed for task ':path_provider:verifyReleaseResources'. > A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade > Android resource linking failed /home/mehrdad/.gradle/caches/transforms-2/files-2.1/a528b13ac93e64cafa3d0480e2c93207/core-1.1.0/res/values/values.xml:142:5-173:25: AAPT: error: resource android:attr/fontVariationSettings not found. /home/mehrdad/.gradle/caches/transforms-2/files-2.1/a528b13ac93e64cafa3d0480e2c93207/core-1.1.0/res/values/values.xml:142:5-173:25: AAPT: error: resource android:attr/ttcIndex not found. * Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights. * Get more help at https://help.gradle.org BUILD FAILED in 34s
after some search in the flutter issue and flutter document, I see some same question that was the same with my problem. in debug mode when I try flutter run app install on android phone without any problem and it works perfectly. but then I try these commands:
flutter clean flutter build apk
I got top error. this is my pubspec.yaml file:
name: atlas_gen_demo description: A new Flutter project. # The following line prevents the package from being accidentally published to # pub.dev using `pub publish`. This is preferred for private packages. publish_to: "none" # Remove this line if you wish to publish to pub.dev # The following defines the version and build number for your application. # A version number is three numbers separated by dots, like 1.2.43 # followed by an optional build number separated by a +. # Both the version and the builder number may be overridden in flutter # build by specifying --build-name and --build-number, respectively. # In Android, build-name is used as versionName while build-number used as versionCode. # Read more about Android versioning at https://developer.android.com/studio/publish/versioning # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion. # Read more about iOS versioning at # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html version: 1.0.0+1 environment: sdk: ">=2.7.0 <3.0.0" dependencies: flutter: sdk: flutter # The following adds the Cupertino Icons font to your application. # Use with the CupertinoIcons class for iOS style icons. cupertino_icons: ^0.1.3 simple_animations: ^1.3.3 sqflite: ^1.1.3 path_provider: ^0.4.1 shared_preferences: ^0.5.0 flushbar: ^1.5.0 flutter_datetime_picker: ^1.3.8 #git: #url: https://github.com/derohimat/flutter_datetime_picker.git dev_dependencies: flutter_test: sdk: flutter # For information on the generic Dart part of this file, see the # following page: https://dart.dev/tools/pub/pubspec # The following section is specific to Flutter. flutter: # The following line ensures that the Material Icons font is # included with your application, so that you can use the icons in # the material Icons class. uses-material-design: true # To add assets to your application, add an assets section, like this: assets: - assets/images/ # An image asset can refer to one or more resolution-specific "variants", see # https://flutter.dev/assets-and-images/#resolution-aware. # For details regarding adding assets from package dependencies, see # https://flutter.dev/assets-and-images/#from-packages # To add custom fonts to your application, add a fonts section here, # in this "flutter" section. Each entry in this list should have a # "family" key with the font family name, and a "fonts" key with a # list giving the asset and other descriptors for the font. For # example: fonts: - family: persianBold fonts: - asset: assets/fonts/main_bold.ttf - family: persianMedium fonts: - asset: assets/fonts/main_medium.ttf # For details regarding fonts from package dependencies, # see https://flutter.dev/custom-fonts/#from-packages
I think maybe this problem is for
flutter_datetime_picker: ^1.3.8
. but I'm not sure. may please guide me to fix this problem. thank yousource code in GitHub: https://github.com/mehrdaddolatkhah/Atlas-gen-demo
Edit: or maybe the problem is for
:path_provider:verifyReleaseResources
I used path_provider in my db_helper in this method:initDb() async { io.Directory documentDirectory = await getApplicationDocumentsDirectory(); String path = join(documentDirectory.path, DB_NAME); var db = await openDatabase(path, version: 1, onCreate: _onCreate); return db; }
is it possible we have a problem with
path_provider
?Edit number 2: after update pubspec.yaml:
cupertino_icons: ^0.1.3 simple_animations: ^1.3.3 sqflite: ^1.1.3 path_provider: ^1.6.10 shared_preferences: ^0.5.0 flushbar: ^1.5.0 flutter_datetime_picker: ^1.3.8
and with this command:
flutter build apk --release
I can build an APK without any problem but when installing the APK on the android device I just see a gray screen without nothing. why this happen?
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Sanket Vekariya almost 4 yearsIs your code updated on git? because I am not facing any kind of issue with that.
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Sanket Vekariya almost 4 yearsCheckout your git project release build here: gofile.io/d/BXHMJT and it works fine for me. :)
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Mehrdad Dolatkhah almost 4 yearsthank you for your response guys. I fixed the issue. this problem was because use positioned in my widget tree and after remove positioned everything worked correctly.
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