Error to return Dart/flutter value

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Good evening, you guys. I am trying to learn how to use Bloc with rxdart. I am having difficulty recovering the value of the API When debugging does not know if an Exception appears it follows image, more has result more when placing it shows error follows inserir a descrição da imagem aqui

follows complete code API_SERVICE inserir a descrição da imagem aqui

Books_bloc inserir a descrição da imagem aqui

bookModel inserir a descrição da imagem aqui

booktile inserir a descrição da imagem aqui

Thank you in advance.

dart flutter
  • 1

    You need to provide more information, especially on the error that is presented, or on the behavior that you expect to be happening. A tip is to put the code in text, so that someone can use it to test and simulate the problem, it is difficult to debug something through images. Here is a link to how to post https://answall.com/editing-help

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Solved with Bloc removal leaving only with setState.

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