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flutterflame

Flame Error: Cannot run with sound null safety

After installing flame and when i run my app in flutter (flutter run). I got a long error regarding null safety:

Running Gradle task 'assembleDebug'...
Error: Cannot run with sound null safety, because the following dependencies
don't support null safety:

 - package:flame
 - package:ordered_set
 - package:box2d_flame
 - package:audioplayers
 - package:path_provider
 - package:flutter_svg
 - package:path_provider_linux
 - package:path_provider_windows
 - package:path_provider_platform_interface
 - package:uuid
 - package:xdg_directories
 - package:plugin_platform_interface
 - package:crypto
 - package:convert
 - package:path_drawing
 - package:xml
 - package:path_parsing
 - package:petitparser
...
Solution

  • You are using the old version (0.29.3) which doesn't support null-safety, you have to use one of the newer release candidates of 1.0.0.

    dependencies:
  flame: ^1.0.0-releasecandidate.11

    https://pub.dev/packages/flame/versions/1.0.0-releasecandidate.11/install