Flutter Packages Get Failed

Question

I am trying to add this library to my flutter project: https://pub.dartlang.org/packages/charts_flutter#-installing-tab-

When I add the dependency to my pubspec.yaml file and hit packages get, I get the following error:

The current Dart SDK version is 2.1.0-dev.9.4.flutter-f9ebf21297.

Because charts_flutter >=0.6.0 depends on charts_common >=0.6.0 which requires SDK version >=2.1.0 <3.0.0, charts_flutter >=0.6.0 is forbidden. So, because undaunted_golf_flutter depends on charts_flutter ^0.6.0, version solving failed.

pub get failed (1) Process finished with exit code 1

To me, it looks like I have the most up to date version of Dart, which matches the minimum version the chart_common library requires. I updated my Android Studio yesterday (2/15/2019), the same day the charts_flutter and charts_common were updated.

What am I missing here?

Solution

The current Dart SDK version is 2.1.0-dev.9.4.flutter-f9ebf21297.

... charts_flutter ... requires SDK version >=2.1.0 <3.0.0

This means you need to update your Flutter installation.

Either flutter upgrade or if that doesn't result in a new enough Flutter version,

use

flutter channel dev
flutter doctor

or alternatively use an older charts_flutter version than >=0.6.0 that does not depend on <= 2.1.0-dev

Comments

[Eric Duffett]

I tried flutter upgrade. Here is what comes back: /Users/duffette/flutter/bin/flutter --no-color upgrade Upgrading Flutter from /Users/duffette/flutter... Already up to date. Upgrading engine... Already up-to-date. Flutter 1.0.0 • channel stable • github.com/flutter/flutter.git Framework • revision 5391447fae (3 months ago) • 2018-11-29 19:41:26 -0800 Engine • revision 7375a0f414 Tools • Dart 2.1.0 (build 2.1.0-dev.9.4 f9ebf21297)

[Günter Zöchbauer]

Then you need to switch to dev channel to get newer Flutter versions until the next stable channel update is released (or use an older charts_flutter package.