how can I fix this error in flutter with android studio
/C:/src/flutterSDK/flutter/.pub-cache/hosted/pub.dartlang.org/get-4.6.3/lib/get_navigation/src/snackbar/snackbar.dart:452:31: Error: Method 'addPostFrameCallback' cannot be called on 'SchedulerBinding?' because it is potentially null.
'SchedulerBinding' is from 'package:flutter/src/scheduler/binding.dart' ('/C:/src/flutterSDK/flutter/packages/flutter/lib/src/scheduler/binding.dart').
Try calling using ?. instead.
SchedulerBinding.instance.addPostFrameCallback(
^^^^^^^^^^^^^^^^^^^^
This error happens because the package get 4.6.2 or 4.6.3 is for new flutter sdk version 3.0. So you got this error. you have to use get 4.6.1 for fluter SDK version 2.xx
I had the same problem.. on "dart.get" package. Then I did this..
First go to pubspec.yaml file then edit the get version not more than
(get: ^4.6.1).. if you are using fluter sdk v2.xx.
if the version won't get lower then try this method
go to pubspec.lock file. edit the version not more than (4.6.1).. if you are using fluter sdk v2.xx.
you will find in pubspec.lock file
and last you have to do this
then "pub get" .. error will be gone.
This is because of recent flutter updates. All flutter SDKs >= V2.10.3 have this issue. There's no proper solution for this error yet.
Temporary Solution:
You can simply downgrade your flutter SDK to V2.10.2 or lower to get rid of this issue.
Note:
After downgrading, make sure you also change the dart version in pubspec.yaml of your flutter project according to the Flutter SDK.
This error is due to some changes happened in null-safety properties in Flutter 3.0.0. In your case you can try to import:
get: 4.6.1 instead of get: ^4.6.3.
Source: https://github.com/jonataslaw/getx/issues/2356
try this
flutter doctor --android-licenses
Related
Earlier, I was using flutter 3.4, and My project compiled successfully. Recently, We've migrated to flutter 3.7 and I am getting the below error.
error: [+1994 ms] ../../../../../../development/flutter/packages/flutter/lib/src/material/color_scheme.dart:237:54: Error: The getter 'outlineVariant' isn't defined for the class 'Scheme'.
The issue happens due to the latest flutter version upgrade. I fixed the issue by downgrading the flutter version to flutter 3.4 instead of flutter 3.7
For me doing flutter clean and then flutter pub get solved the problem.
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/fluttertoast-8.1.3/lib/fluttertoast.dart:165:28: Error: Member not found: 'Overlay.maybeOf'.
var _overlay = Overlay.maybeOf(context!);
^^^^^^^
/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/fluttertoast-8.1.3/lib/fluttertoast.dart:154:18: Error: The getter 'mounted' isn't defined for the class 'BuildContext'.
- 'BuildContext' is from 'package:flutter/src/widgets/framework.dart' ('/C:/src/flutter/packages/flutter/lib/src/widgets/framework.dart').
framework.dart:1
Try correcting the name to the name of an existing getter, or defining a getter or field named 'mounted'.
if (context?.mounted != true) {
^^^^^^^
3
FAILURE: Build failed with an exception.
* Where:
Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1159
After adding fluttertoast in my project it shows this problem while I run project on my device.
Now, what does it mean?
I was trying to show toast when an error or success occurred. But without snackbar fluttertoast is the only option to do.
But after adding dependency this problem showed.
Update: Found the actual issue:
Flutter toast v8.1.3 cannot work with a Flutter version older than 3.7.0 because of a breaking change in Flutter v3.7.0. You have to either use fluttertoast v8.1.2 or you have to upgrade your flutter version to v3.7.0+.
Old Answer
I faced a similar issue after running the flutter pub upgrade but even after rolling back the changes in the pubspec.yaml file, I got the same error. But this issue was fixed after rolling back the changes in the pubspec.lock file. Make sure to do flutter clean after reverting changes in pubspec.lock file.
I also came across the same problem,
Due to some limitations I was not able to change the flutter version, and Changing the version of fluttertoast has not led to any success. so what I do is try some other alternatives
toast: ^0.3.0
https://pub.dev/packages/toast
I removed fluttertoast completely from the project and install a new dependency by running the command in the terminal
flutter pub add toast
usage:
Toast.show("Toast plugin app", duration: Toast.lengthShort, gravity: Toast.bottom);
try to use this:
if (!mounted) return;
snackBar(yourText, context);//or use your fluttertoast
if you had any problem or question i'm here to answer.
happy coding.
Unfortunately, this error is caused by a version incompatibility between the fluttertoast package and your version of Flutter. The Overlay.maybeOf method was removed in Flutter 2.0 and replaced with Overlay.of, which is likely what the fluttertoast package is using.
In order to fix this error, you can try upgrading to the latest version of fluttertoast, or if that doesn't work, downgrade your version of Flutter to a version compatible with the version of fluttertoast you are using.
So i am trying to get started with riverpod and creating a new flutter project with the "click and counter" default sample.
As soon as I add on the pubspec
flutter_hooks: ^0.18.0
hooks_riverpod: ^2.0.0
And
import 'package:hooks_riverpod/hooks_riverpod.dart';
I get this error on the debug console and can't figure it out what is the problem
: Error: Method not found: 'Error.throwWithStackTrace'.
../…/framework/provider_base.dart:904
Error.throwWithStackTrace(error, chain);
^^^^^^^^^^^^^^^^^^^
: Error: A non-null value must be returned since the return type 'Never' doesn't allow null.
../…/framework/provider_base.dart:898
Never _rethrowProviderError(Object error, StackTrace stackTrace) {
^
Error.throwWithStackTrace was added in Dart 2.16 (Flutter version 2.10 from Feb 8, 2022).
https://api.flutter.dev/flutter/dart-core/Error/throwWithStackTrace.html
(Check the #Since annotation.)
If your Flutter/Dart version is below that, you'll get the error you saw.
Two options that may help are:
Specify an exact version of dependencies (don't use ^ ahead of version)
upgrade Flutter/Dart to at least 2.10/2.16
flutter upgrade
If your problematic package (hooks_riverpod: ^2.0.0 in your case) is listed with ^, it'll use the latest version that doesn't break dependencies.
I'm guessing that when you created a new project and used that same dependency version, upon initial pub get it downloaded a newer version of the package (or a newer version of a dependency that that package uses) into "pub cache" which is relying on the new Error API method.
Your project will store this information in:
<your_project_dir>/dart_tool/package_config.json
The min Dart SDK version listed for the package should normally have changed from 2.12 to 2.16. (update: it's been updated now) This would give us a hint that we need to update our Flutter/Dart if we see our build failing.
In an earlier version of this answer, I noted that the ^ prefix on package dependency versions is supposed to prevent these types of issues, but I'm no longer certain it was meant to cover this situation where the underlying platform needs to be updated (as opposed to a breaking change in the API of the package itself).
Anyways, at first glance, it might make sense to go from 2.0.0 to 3.0.0 for a package version # when it depends on a new core Dart API method that did not exist when 2.0.0 was published.
Notes
The author of riverpod also wrote the new API for Error.throwWithStackTrace so likely the latest version of hooks_riverpod is using the latest API changes. (The version you're listing 2.0.0 is pre-release currently). You could try earlier versions of riverpod in your pubspec.yaml (such as 1.0.3)
for anyone facing " Method not found: 'Error.throwWithStackTrace' " with firebase.
try to add this to your pubspec.yaml
dependency_overrides:
firebase_messaging_platform_interface: 3.1.6
I saw this.
How about trying flutter pub upgrade?
If it is not resolved, then check analyzer version and check which dependency locks that.
As noted in Baker's answer, Error.throwWithStackTrace was recently added in Dart 2.16.
If you're getting an error about Error.throwWithStackTrace not being found for some package, the package author neglected to update their package's minimum Dart SDK version. You should report that to the package maintainer. In the meantime, you should use an earlier version of the problematic package or use a newer version of the Dart SDK.
Try running flutter upgrade
By this it will upgrade your flutter and dart SDK version and hope it resolves your issue
if you are still facing the issues after "flutter upgrade" or you use this line of code in pubspec.yaml
dependency_overrides:
firebase_messaging_platform_interface: 3.1.6
you receive this type of errors
java.lang.AssertionError: annotationType(): unrecognized Attribute name MODULE (class com.sun.tools.javac.util.UnsharedNameTable$NameImpl)
at com.sun.tools.javac.util.Assert.error(Assert.java:133)
at com.sun.tools.javac.code.TypeAnnotations.annotationType(TypeAnnotations.java:231)
at com.sun.tools.javac.code.TypeAnnotations$TypeAnnotationPositions.separateAnnotationsKinds(TypeAnnotations.java:294)
at com.sun.tools.javac.code.TypeAnnotations$TypeAnnotationPositions.visitMethodDef(TypeAnnotations.java:1066)
at com.sun.tools.javac.tree.JCTree$JCMethodDecl.accept(JCTree.java:778)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:49)
at com.sun.tools.javac.code.TypeAnnotations$TypeAnnotationPositions.scan(TypeAnnotations.java:275)
at com.sun.tools.javac.tree.TreeScanner.scan(TreeScanner.java:57)
so Try to upgrade your gradle version, this line in your build.gradle
classpath 'com.android.tools.build:gradle:4.1.0'
after doing that it may be possible it ask you to change your
gradle-wrapper.properties
distributionUrl=https://services.gradle.org/distributions/gradle-6.1.1-all.zip
to
distributionUrl=https://services.gradle.org/distributions/gradle-6.5-all.zip
also upgarde this packages
firebase_core: ^1.10.0
firebase_messaging: ^11.1.0
when i put admob_flutter: ^2.0.0-nullsafety.1 in pubspec, and type on cmd flutter pub get this error occurs!
The plugin admob_flutter uses a deprecated version of the Android embedding.
To avoid unexpected runtime failures, or future build failures, try to see if this plugin supports the Android V2 embedding. Otherwise, consider removing it since a future release of
Flutter will remove these deprecated APIs.
It's for latest flutter updates. so you can't do anything. Please use other package or wait till fix the problem by package developer because this error is produced after flutter version 2.5.
I have downgraded my flutter version by command flutter downgrade and it shows an option of a downgraded flutter version and it resolves my error.
Downgrading flutter worked for me.
Recently I've updated to flutter 2.5 and the newest androids studio, and tried to compile my flutter project to android device. Android studio throws me the error below. If I write flutter run in a terminal there is no problem compiling to android device.
Guess this must be related to android studio. I tried downgrade to an earlier android studio version, but the problem persists.
I'm not sure what plugin this is, it doesn't seem like any I use in my project.
Edit: If I downgrade flutter from 2.5 to 2.0 my project compiles again. So the problem is within flutter 2.5
Launching lib/main.dart on Android SDK built for x86 in debug mode...
Running Gradle task 'assembleDebug'...
../plugins/flutter/.pub-cache/hosted/pub.dartlang.org/photo_view-0.11.1/lib/src/core/photo_view_gesture_detector.dart:106:29: Error: The argument type 'PointerEvent' can't be assigned to the parameter type 'PointerDownEvent'.
- 'PointerEvent' is from 'package:flutter/src/gestures/events.dart' ('../plugins/flutter/packages/flutter/lib/src/gestures/events.dart').
- 'PointerDownEvent' is from 'package:flutter/src/gestures/events.dart' ('../plugins/flutter/packages/flutter/lib/src/gestures/events.dart').
super.addAllowedPointer(event);
There was an API change in version 2.5 of flutter and several packages must update accordingly.
Your logs show that the exact package which contains the error is photo_view.
Luckily enough the package has just been updated to fix this, so just update its version in your pubspec.yaml:
photo_view: ^0.12.0
UPDATE
If you don't have the package directly in your pubspec
You have two options
1 It's probably a transient dependency, you can run flutter pub deps
to list the installed packages and its dependencies and try to update the one that uses photo_view (if it does have an update)
2 Add a dependency override to your pubspec.yaml, this will effectively override the version of the package being used
dependency_overrides:
photo_view: ^0.12.0
Add this just before your dev_dependencies
from your debug code
('../plugins/flutter/packages/flutter/lib/src/gestures/events.dart').
you open the file or click if there are link clickable
Search for this:
void addAllowedPointer(PointerEvent event) {
and replace with this:
void addAllowedPointer(PointerDownEvent event) {
Here is the reference link
https://flutter.dev/docs/release/breaking-changes/gesture-recognizer-add-allowed-pointer
This problem arises due to the GestureRecognizer Cleanup -
Here is the documentation if you are intrested in the migration code
But in case you just want to build your flutter app without any migrations following are couple of solutions to that problem
You can update photo_view dependency in your pubspec.yaml file to
photo_view :^0.12.0
If you do not want to update your dependency due to any reason you can opt for this temporary fix . In the pubspec.yaml file add the following custom photo_view with better gesture recognition in dependency_overrides.
dependency_overrides:
photo_view:
git: git://github.com/robertodoering/photo_view.git