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1.22 is out and introduces many things, but in this post, I'll only mention the buttons: * The old FlatButton has been replaced by TextButton. * The old RaisedButton has been replaced by ElevatedButton. * The old OutlineButton has been replaced by OutlinedButton.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

You can watch the 1 minute YouTube demo on the documentation: Hero class - widgets library - Dart APIAPI docs for the Hero class from the widgets library, for the Dart programming language.Dart API There's also a full page that goes in-depth about the topic: https://flutter.dev/docs/

Thanks to the hard work of package developers, it is easy to record audio in Flutter. First try I used one of the first results from a search on pub.dev. The package is called flutter_sound. After setting the permissions in the Android and iOS project as documented, I

In the previous post, we covered how to handle Share Text intents. This post builds on the previous one, so check it out if you haven't done so yet. This time we'll go through receiving Share Image intents. Note that this works for regular files too. Intent Filter The intent