Today I upgraded Flutter from version 2.7 to 2.9, and my app compilation started failing with this error: ~/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-common/1.5.31/43331609c7de811fed085e0dfd150874b157c32/kotlin-stdlib-common-1.5.31.jar!/META-INF/kotlin-stdlib-common.kotlin_module: Module was compiled with an incompatible version of Kotlin.

My app suddenly refused to run on my Android Emulator. The error was: Launching lib/main.dart on sdk gphone64 arm64 in debug mode... WARNING: [Processor] Library '~/.gradle/caches/modules-2/files-2.1/com.github.canardoux/flutter_sound_core/8.4.2/d794510c32a335c61b742367e24e84ea0b0995c8/flutter_sound_core-8.4.2.aar' contains

Today I tried to run a Desktop (macOS) Flutter app that used to run perfectly. This time, instead of launching, it threw this error: Launching lib/main.dart on macOS in debug mode... lib/main.dart:1ProcessException: Process exited abnormally: xcrun: error: unable to find utility "xcodebuild", not a developer

Today I ran into some performance issue when I used my image gallery app on a folder of 17k images. Lots of jank. So I decided to use the Flutter profiler for the first time. I started from the Flutter performance profiling page. Flutter performance profilingDiagnosing UI performance issues in

I recently started using eBay's golden_toolkit for screenshot tests instead of Flutter's built-in matchesGoldenFile. My main issue with the built-in function was that it would use the Ahem font, which is all blocks. It makes it much harder to see if your app rendered correctly. In the past, I

The tool recommended by Flutter is Sentry. I've tried it and it's perfect for me. First you check out the tutorial about it. Report errors to a serviceHow to keep track of errors that users encounter.Flutter Logo What does it look like? With Sentry, whenever an exception occurs, it'll

I wanted to convert a ListView into a GridView so that it would show more information on a large screen such as Web. My ListView code looked like this: return ListView.builder( physics: scrollable ? null : NeverScrollableScrollPhysics(), shrinkWrap: shrinkWrap, padding: EdgeInsets.only(top: 16.0), itemCount: words.length, itemBuilder: (context, index)

According to the guide at https://dart.dev/null-safety/migration-guide, migrating to null safety is straightforward. Let's try it on a large project. So today I switched the sdk version to 2.12 in my pubspec.yaml, and 300+ compilation errors appeared. I tried the migration tool: % dart migrate Migrating

Yesterday I made a quick update to my app. All the code compiled and all the tests succeeded, so I published an update. This morning, I wake up to a half broken app. What happened? The simplified snippet was: await Firebase.initializeApp(); final instance = FirebaseFirestore.instance; final transformer = StreamTransformer.fromHandlers(

I tried compiling my app on a new environment, and it failed when installing iOS pods with this error: Specs satisfying the sqflite (from .symlinks/plugins/sqflite/ios) dependency were found, but they required a higher minimum deployment target. Longer logs: % flutter build ios --release --no-codesign ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Warning ────────────────────────────────────────────────────────────────────────────── Your Flutter application

I am using permissionhandler on a Flutter project, and this just happened. permission_handler-4.4.0+hotfix.4/android/src/main/java/com/baseflow/permissionhandler/PermissionManager.java:315: error: cannot find symbol if (Build.VERSION.SDK_INT < Build.VERSION_CODES.Q) { ^ symbol: variable Q location: class VERSION_CODES /Users/anhtuan/

I've been using a bluetooth keyboard with my Flutter app. And in some cases, I experienced repeated crashes. Some of the errors were: E/InputEventSender( 4319): Exception dispatching finished signal. E/MessageQueue-JNI( 4319): Exception in MessageQueue callback: handleReceiveCallback E/MessageQueue-JNI( 4319): java.lang.IndexOutOfBoundsException: charAt: -1 < 0 E/MessageQueue-JNI( 4319)

I've recently had to hide the keyboard on scroll in my app. Once the user has finished typing, they typically scroll down. By hiding the keyboard, they gain a lot of real estate. First try: ScrollController My view uses a SingleChildScrollView to show scrollable content. My first try was to

Here's a few collections of links to posts that have helped me. Scroll a widget into view In my case, I had a bunch of disparate widgets rendered in a ListView, so I couldn't predict where the widget I wanted to scroll to was. ListView's ScrollController only allows you to

Flutter 1.22 is out and introduces many things, but in this post, I'll only mention the buttons: * The old FlatButton has been replaced by TextButton. * The old RaisedButton has been replaced by ElevatedButton. * The old OutlineButton has been replaced by OutlinedButton. Note that the visual difference is almost imperceptible.

My app compiled fine, but when uploading to the App Store, I got this error": Return status of iTunes Transporter was 1: ERROR ITMS-90208: "Invalid Bundle. The bundle Runner.app/Frameworks/App.framework does not support the minimum OS Version specified in the Info.plist." A quick search on Google

I wanted to try out google_fonts and use it to display beautiful text in Korean. It was harder than the doc said. I started according to the instructions at https://pub.dev/packages/google_fonts, adding the dependency to my pubspec.yaml, then using one of its predefined methods:

Because of this new package I needed, I had to upgrade my Flutter. So I ran flutter upgrade as usual. This time instead of upgrading without a hitch, it told me: % flutter upgrade Upgrading Flutter from ~/flutter... From https://github.com/flutter/flutter ... fatal: Not possible to fast-forward, aborting. So

It should be as simple as running: flutter channel stable flutter upgrade But after doing so, I ran into the following error when trying to run integration tests in iOS: [VERBOSE-2:shell.cc(199)] Dart Error: Can't load Kernel binary: Invalid kernel binary format version. [VERBOSE-2:engine.cc(198)] Could