flutter precache image

Famous Flatworm answered on November 20, 2022 Popularity 8/10 Helpfulness 2/10

answer flutter precache image

flutter precache image

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Future<void> precacheImage(
  ImageProvider provider,
  BuildContext context, {
  Size? size,
  ImageErrorListener? onError,
}) {
  final ImageConfiguration config = createLocalImageConfiguration(context, size: size);
  final Completer<void> completer = Completer<void>();
  final ImageStream stream = provider.resolve(config);
  ImageStreamListener? listener;
  listener = ImageStreamListener(
    (ImageInfo? image, bool sync) {
      if (!completer.isCompleted) {
        completer.complete();
      }
      // Give callers until at least the end of the frame to subscribe to the
      // image stream.
      // See ImageCache._liveImages
      SchedulerBinding.instance.addPostFrameCallback((Duration timeStamp) {
        stream.removeListener(listener!);
      });
    },
    onError: (Object exception, StackTrace? stackTrace) {
      if (!completer.isCompleted) {
        completer.complete();
      }
      stream.removeListener(listener!);
      if (onError != null) {
        onError(exception, stackTrace);
      } else {
        FlutterError.reportError(FlutterErrorDetails(
          context: ErrorDescription('image failed to precache'),
          library: 'image resource service',
          exception: exception,
          stack: stackTrace,
          silent: true,
        ));
      }
    },
  );
  stream.addListener(listener);
  return completer.future;
}

Popularity 8/10 Helpfulness 2/10 Language whatever

Source: api.flutter.dev

Tags: flutter image whatever

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Contributed on Nov 20 2022

Famous Flatworm

0 Answers Avg Quality 2/10

flutter precache image

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