Ошибка: тип аргумента «void Function (ImageInfo, bool)» не может быть назначен типу параметра «ImageStreamListener» - PullRequest
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Ошибка: тип аргумента «void Function (ImageInfo, bool)» не может быть назначен типу параметра «ImageStreamListener»

3 голосов
/ 09 июля 2019

После обновления запуска флаттера приложение не запускается. Я обновляю, потому что ImageStreamListener

Я пытался переключаться между разными каналами [master, stable, dev] и не работал.

Я обнаружил эту проблему во флаттере, но она не помогает.

Вот мой flutter doctor

[✓] Flutter (Channel unknown, v1.7.11, on Mac OS X 10.14.5 18F132, locale en-PE)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Xcode - develop for iOS and macOS (Xcode 10.2.1)
[✓] iOS tools - develop for iOS devices
[✓] Chrome - develop for the web
[✓] Android Studio (version 3.4)
[!] IntelliJ IDEA Ultimate Edition (version 2019.1)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.36.0)
[✓] Connected device (3 available)

и сообщение об ошибке 

Compiler message:                                                       
file:///Users/enzoftware/Development/flutter/.pub-cache/hosted/pub.dartlang.org/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:///Users/enzoftware/Development/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/enzoftware/Development/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:///Users/enzoftware/Development/flutter/.pub-cache/hosted/pub.dartlang.org/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:///Users/enzoftware/Development/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/enzoftware/Development/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:///Users/enzoftware/Development/flutter/.pub-cache/hosted/pub.dartlang.org/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:///Users/enzoftware/Development/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/enzoftware/Development/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);                                  
                       ^                                                
Compiler failed on /Users/enzoftware/Projects/Wibo/wibo-flutter-mobile-user/lib/main.dart

FAILURE: Build failed with an exception.                                

* Where:                                                                
Script '/Users/enzoftware/Development/flutter/packages/flutter_tools/gradle/flutter.gradle' line: 652

* What went wrong:                                                      
Execution failed for task ':app:compileflutterBuildDebugArm'.           
> Process 'command '/Users/enzoftware/Development/flutter/bin/flutter'' finished with non-zero exit value 1

* Try:                                                                  
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org                              

BUILD FAILED in 29s                                                     
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                        29.7s
Gradle task assembleDebug failed with exit code 1

Заранее спасибо.

1 Ответ

1 голос
/ 09 июля 2019

В этом API недавно произошли критические изменения.

вот пример старого и нового использования 

    // get the width, height
    Image image = new Image.file(myImageFile);
    Completer<ImageInfo> completer = Completer();

    // Old API
//    image.image
//        .resolve(new ImageConfiguration())
//        .addListener((ImageInfo info, bool _) {
//      completer.complete(info);
//    });

    // New API
    image.image
        .resolve(new ImageConfiguration())
        .addListener(ImageStreamListener((ImageInfo info, bool _) {
      completer.complete(info);
    }));

    // wait for ImageInfo to finish
    ImageInfo imageInfo = await completer.future;
...