BlocListener not being executed after Cubit function call

Issue

So, I have a cubit with a function that POSTs some data. I have three states, DataLoading, DataError and DataLoaded for my cubit.

When the user taps on a button, I call the function in the cubit. After that, I have a BlocListener to wait until the Cubit emits the DataLoaded state. The issue is that the listener is reacting to the state changes.

Button(
  text: 'Add',
  onTap: () {
    final data = _textController.text;
    
    context.read<PostDataCubit>().post(data);

    BlocListener<PostDataCubit, PostDataState>(
      listener: (context, state) {
        if (state is DataLoaded) {
          // navigate to another route
        } else if (state is DataError) {
          // show error
        }
      },
    );
  }
),

I’ve tried using await on the read() call but that didn’t work. How do I react to the state changes here? Thanks.

Solution

This BlocListener isn’t listening because you have added the listener inside a function instead of adding it in widget tree. Wrap your button inside BlocConsumer widget and it will works fine. Have a look into below code.

BlocListener<PostDataCubit, PostDataState>(
  listener: (context, state) {
     if (state is DataLoaded) {
          // navigate to another route
      } else if (state is DataError) {
           // show error
       }
    },
   builder: (context, state) {
     return Button(
        text: 'Add',
         onTap: () {
           final data = _textController.text;

            context.read<PostDataCubit>().post(data);
        });
      },
 ),

Answered By – TheAlphamerc

Answer Checked By – Senaida (FlutterFixes Volunteer)

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