CODEWITHSUNDEEP
flutterdart
BriscoPeas Aristide
BriscoPeas Aristide

Reputation: 129

Flutter does not work anymore after upgrading

My project was working perfectly and Just today i have upgrade my Flutter then everything start going run.

At the bottom is the error they give me. Please help me.

file:///Users/macbook/Documents/flutter/.pub-cache/hosted/pub.dartlang.org/animated_background-1.0.4/lib/image_helper.dart:17:30: Error: The argument type 'dynamic Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
 - 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
    newStream.removeListener(listener);
                             ^
file:///Users/macbook/Documents/flutter/.pub-cache/hosted/pub.dartlang.org/animated_background-1.0.4/lib/image_helper.dart:20:25: Error: The argument type 'dynamic Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
 - 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  newStream.addListener(listener);
                        ^
file:///Users/macbook/Documents/flutter/.pub-cache/hosted/pub.dartlang.org/animated_background-1.0.4/lib/image_helper.dart:21:41: Error: The argument type 'dynamic Function(ImageInfo, bool)' can't be assigned to the parameter type 'ImageStreamListener'.
 - 'ImageInfo' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
 - 'ImageStreamListener' is from 'package:flutter/src/painting/image_stream.dart' ('file:///Users/macbook/Documents/flutter/packages/flutter/lib/src/painting/image_stream.dart').
Try changing the type of the parameter, or casting the argument to 'ImageStreamListener'.
  return () => newStream.removeListener(listener);
                                        ^
Compiler failed on /Users/macbook/AndroidStudioProjects/alimmentation/lib/main.dart
Finished with error: Gradle task assembleDebug failed with exit code 1

Upvotes: 4

Views: 3964

Answers (4)

Ethan Liew
Ethan Liew

Reputation: 111

Facing ImageStreamListener error in flutter printing plugin. I am using flutter 1.5.4 hotfix 2 version.

Use printing: 2.0.2 # fix it at this version to solve ImageStreamListener issue.

Hope it helps

Upvotes: 0

lastant
lastant

Reputation: 161

Solved a similar issue by replacing

/*...*/.addListener((ImageInfo image, bool synchronousCall) { /*...*/ });

with

import 'package:flutter/painting.dart';

/*...*/.addListener(new ImageStreamListener((ImageInfo image, bool synchronousCall) { /*...*/ }) as ImageStreamListener);

Upvotes: 6

Miguel Ruivo
Miguel Ruivo

Reputation: 17776

Change your animated_background dependency in the pubspec.yaml file to the following:

animated_background:
    git: https://github.com/AndreBaltazar8/flutter_animated_background.git

Do a flutter clean afterwards and rebuild.

Reason: That happens because that dependency has actually been changed in the repo to match some of the framework changes related to the Image API, but not in the pub.dev.

Upvotes: 0

Mauricio Pastorini
Mauricio Pastorini

Reputation: 852

I had the same problem, here is some code only as an example

Code that broke: 

var sunImage = new NetworkImage(incident.mobileSignature[0].uriFile,
          headers: AuthenticationService.getAuthHeaders());
sunImage.obtainKey(new ImageConfiguration()).then((val) {
    var load = sunImage.load(val);
    load.addListener((listener, err) async {
        ByteData data = await listener.image.toByteData(format:ui.ImageByteFormat.png);
        setState(() => this.signatureImage = data);
    });
  });
}

The code broke on line load.addListener((listener, err) async { ....

I solved creating an ImageListener function that does the same as my previous function with the listener variable. And then create an ImageStreamListener that receives this ImageListener as parameter. Note also that you can send as parameters onError and onChunk to the ImageStreamListener.

var sunImage = new NetworkImage(incident.mobileSignature[0].uriFile,
          headers: AuthenticationService.getAuthHeaders());
sunImage.obtainKey(new ImageConfiguration()).then((val) {
    var load = sunImage.load(val);
    ImageListener imageListener = (ImageInfo imageInfo, syncCall) async {
        ByteData data =
              await imageInfo.image.toByteData(format: ui.ImageByteFormat.png);
          setState(() => this.signatureImage = data);
    };
    ImageStreamListener listenerStream = new ImageStreamListener(imageListener);
    load.addListener(listenerStream, onError: ...., onChunk: ......); // These last parameters are optional
});

Upvotes: 1

Related Questions