Memory Leak occurs when using ImageBuilder

[violet-dev]

• no cacheExtent, no use imageBuilder
  

• cacheExtent: height * 2, no use imageBuilder
  

• no cacheExtent, use imageBuilder
  

• cacheExtent: height * 2, use imageBuilder
  

Thanks for making a nice library!
When I use imageBuilder I get an error where the memory is not released properly.

  List<double> _height = List<double>.filled(999, 0);

  @override
  Widget build(BuildContext context) {
    final width = MediaQuery.of(context).size.height;
    final height = MediaQuery.of(context).size.height;
    return Scaffold(
      body: ListView.builder(
        itemCount: imgs2.length,
        // cacheExtent: height * 2,
        itemBuilder: (context, index) {
          return OptimizedCacheImage(
            imageUrl: imgs2[index],
            fit: BoxFit.cover,
            imageBuilder: (context, imageProvider) {
              Image imageView = Image(
                image: imageProvider,
              );
              if (_height[index] == 0) {
                ImageStream stream =
                    imageView.image.resolve(ImageConfiguration());
                stream.addListener(
                    ImageStreamListener((ImageInfo info, bool synchronousCall) {
                  var myImage = info.image;
                  Size size =
                      Size(myImage.width.toDouble(), myImage.height.toDouble());
                  _height[index] = width / size.aspectRatio;
                }));
              }
              return imageView;
            },
            progressIndicatorBuilder: (context, string, progress) {
              return SizedBox(
                height: 300,
                child: Center(
                  child: SizedBox(
                    child: CircularProgressIndicator(value: progress.progress),
                    width: 30,
                    height: 30,
                  ),
                ),
              );
            },
          );
        },
      ),
    );
  }

[√] Flutter (Channel beta, 1.21.0-9.2.pre, on Microsoft Windows [Version 10.0.18362.1082], locale ko-KR)
    • Flutter version 1.21.0-9.2.pre at C:\Dev\flutter
    • Framework revision 81a45ec2e5 (4 weeks ago), 2020-08-27 14:14:33 -0700
    • Engine revision 20a9531835
    • Dart version 2.10.0 (build 2.10.0-7.3.beta)


[√] Android toolchain - develop for Android devices (Android SDK version 30.0.0) 
    • Android SDK at F:\android-sdk
    • Platform android-30, build-tools 30.0.0
    • ANDROID_HOME = F:\android-sdk
    • Java binary at: F:\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 4.0)
    • Android Studio at F:\Android\Android Studio
    • Flutter plugin version 47.1.2
    • Dart plugin version 193.7361
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[√] VS Code (version 1.49.1)
    • VS Code at C:\Users\\AppData\Local\Programs\Microsoft VS Code
    • Flutter extension version 3.14.1

[√] Connected device (4 available)
    • Android SDK built for x86 (mobile) • emulator-5554 • android-x86    • Android 10 (API 29) (emulator)
    • Web Server (web)                   • web-server    • web-javascript • Flutter Tools
    • Chrome (web)                       • chrome        • web-javascript • Google Chrome 85.0.4183.102
    • Edge (web)                         • edge          • web-javascript • Microsoft Edge 85.0.564.51

• No issues found!

Full source code: https://github.com/violet-dev/ocimmmmmmmmmmmmm/blob/master/lib/main.dart
(images is sensational)

[violet-dev]

I fixed it like this temporarily

typedef ImageWidgetBuilder = Widget Function(
    BuildContext context, ImageProvider imageProvider, Widget child);
  Widget _octoImageBuilder(BuildContext context, Widget child) {
    return imageBuilder(context, _image, child);
  }

           imageBuilder: (context, imageProvider, child) {
              try {
                final RenderBox renderBoxRed =
                    _keys[index].currentContext.findRenderObject();
                final sizeRender = renderBoxRed.size;
                if (sizeRender.height != 300)
                  _height[index] = width / sizeRender.aspectRatio;
              } catch (e) {}
              return child;
            },

[humblerookie]

Thanks, @violet-dev for raising this, I'll investigate this.

[humblerookie]

Could you check this in the latest release? 2.0.0

[violet-dev]

@humblerookie
Thank you! I'll try that

[humblerookie]

Hi @violet-dev, closing this for now, Feel free to reopen if you face any issues.