跑不起来啊。这个demo

[tianlinzx]

Compiler message:
file:///Volumes/Data/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/palette_generator-0.1.1/lib/palette_generator.dart:188:29: Error: The argument type 'void Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.

• 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
• 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
  Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  stream.removeListener(imageListener);
  ^
  file:///Volumes/Data/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/palette_generator-0.1.1/lib/palette_generator.dart:194:31: Error: The argument type 'void Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
• 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
• 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
  Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  stream.removeListener(imageListener);
  ^
  file:///Volumes/Data/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/palette_generator-0.1.1/lib/palette_generator.dart:201:24: Error: The argument type 'void Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
• 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
• 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
  Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  stream.addListener(imageListener);
  ^
  file:///Volumes/Data/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/photo_view-0.2.5/lib/photo_view.dart:279:24: Error: The argument type 'Null Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
• 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
• 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
  Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  stream.addListener(listener);
  ^
  file:///Volumes/Data/software/flutter/.pub-cache/hosted/pub.flutter-io.cn/photo_view-0.2.5/lib/photo_view.dart:281:29: Error: The argument type 'Null Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
• 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
• 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Volumes/Data/software/flutter/packages/flutter/lib/src/painting/image_stream.dart').
  Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  stream.removeListener(listener);
  ^
  Compiler failed on /Volumes/Data/github/flutter/flutter_app/lib/main.dart
  Error launching application on iPhone Xʀ.

[豆浆油条]

这个是第三方包palette_generator的问题见palette_generator issues 22

你把这个库注释掉试试palette_generator

[tianlinzx]

我刚刚试了一下，切换到稳定版的flutter，ok了。