Fast Track Flutter [Chapter-3]

State Management Bloc

Section 0: Introduction

Stream

Basic Concept Stream

illustration 1

river flows illustration = data flow.

ship illustration = data..

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yield = process of flowing data.

Explanation:

When we want to send ship(data), the ship(data) will pass through yield so that it can be sent ship(data) to the destination.

illustration 2

Case: Counter Number with delay

The output will be auto-counted numbers from 0 to 10, with a delay

Cubit

Cubit Architecture

Important: you need install package bloc & flutter_bloc

how to install package : https://bloclibrary.dev/#/gettingstarted

Basic Cubit

Cubit is a simple BLoC implementation, used to trigger state changes via ‘emit’

Case: Counter Number emit

Cubit Observer

We can observe all changes for a given Cubit by overriding:

• onChange, for observing all changes output to the console.
• onError, for handling all reported errors globally.

docs: https://bloclibrary.dev/#/coreconcepts?id=observing-a-cubit

add cubit observer

Section 1: Cubit