Cubit

example.dart

        child: BlocConsumer<UsuarioCubit, UsuarioState>(
          listener: (context, state) {
            if (state is UsuarioProcessState) {
              FlutterToast(context).showToast(
                child: Container(
                  color: Colors.blue[200],
                  width: double.infinity,
                  child: Column(
                    children: [
                      LinearProgressIndicator(),
                      Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: Text("Carregando..."),
                      ),
                    ],
                  ),
                ),
              );
            }
            if (state is UsuarioErrorState) {
              debugPrint(state.error);
            }
            if (state is UsuarioSuccessState) {
              FlutterToast(context).showToast(
                child: Container(
                  color: Colors.blue[200],
                  width: double.infinity,
                  child: Padding(
                    padding: const EdgeInsets.all(8.0),
                    child: Text(state.successMessage),
                  ),
                ),
              );
            }
          },
          builder: (context, state) {
            return Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                Text(
                  'You have pushed the button this many times:',
                ),
                Text(
                  '',
                  style: Theme.of(context).textTheme.headline4,
                ),
                RaisedButton(
                    onPressed: () async {
                      context.bloc<UsuarioCubit>().fetchEscola();
                    },
                    child: Text("Carregar"))
              ],
            );
          },
        ),