Not able to listen to a broadcast Stream

Question

My standard stream:

var stream = (StreamController<int>()..add(1)).stream;
stream.listen(print); // prints 1

My broadcast stream:

var stream = (StreamController<int>.broadcast()..add(1)).stream;
stream.listen(print); // doesn't print anything

edenar · Accepted Answer · 2020-06-18T10:27:54.043

20

Broadcast streams does not buffer events when there is no listener unlike standard streams. Declare the broadcast stream first, listen to it then add an event.

var controller= StreamController<int>.broadcast();
controller.stream.listen(print); 
controller.sink.add(1); // will print 1

edited Jun 18 '20 at 10:27

answered Jun 18 '20 at 03:42

edenar

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This seems like a comment, please add code to support your answer. Thanks – iDecode Jun 18 '20 at 09:41
Now you deserve a +1, can you also tell me where did you find this about broadcast? – iDecode Jun 19 '20 at 07:14
It's in the code as well as Flutter API docs: https://api.flutter.dev/flutter/dart-async/Stream-class.html – edenar Jun 19 '20 at 09:21

Not able to listen to a broadcast Stream

1 Answers1