Question 75412 in Flutter Question posted in
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listen for stream and print value in dart main function – Flutter

I want to print data.length after listening to this stream but the program executed synchronously. How can I listen to this data stream without using the await-for syntax

void main() async {
  final file = File('assets/text_long.txt');
  final stream = file.openRead();

  stream.listen(
    (data) {
      print(data.length);
    },
  );
}

Here is the output:

Exited (1)
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2

Answers


  1. Chosen as BEST ANSWER
    0

    Use asFuture method.

      final file = File('assets/text_long.txt');
  final stream = file.openRead();

  final streamSubscription = stream.listen(
    (data) {
      print(data.length);
    },
  );
  await streamSubscription.asFuture();

  2. 0

    Use await keyword.

    await stream.listen(
    (data) {
      print(data.length);
    },
  );
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