Chapter Summary

Summarizing dependency injection with GetX

In this chapter on dependency injection with GetX, we were introduced to the concept of dependency injection and learned the various methods and approaches provided by GetX to inject dependencies into classes. We explored helper widgets that separate the presentation layer from the dependency initialization layer and learned how to configure dependency disposal. In this summary lesson, we will revisit the key concepts and important points from all the lessons of this chapter. So, let’s go through each lesson one by one.

Introduction to dependency injection

• Overview:

  • Design pattern for supplying dependencies to classes or functions from external sources.

  • Benefits include decoupling, modularity, testability, reusability, flexibility, and configurability.

• Basic dependency injection:

  • Dependencies passed through class constructors.

  • Example: class First and class Second demonstrating dependency injection through constructor parameters.

• Dependency injection in Flutter:

  • Dependencies passed through widget constructors.

  • Example: Widget1 and Widget2 using constructor parameters to pass dependencies in the widget tree.

• Dependency injection in GetX:

  • Controller creation:

    • Create a controller class with dependencies.

    • Example: Controller with a name variable.

  • Initialization:

    • Initialize controller using Get.put() in a widget.

    • Example: Widget1 initializing Controller with Get.put().

  • Accessing dependencies:

    • Access controller instance using Get.find() in other widgets.

    • Example: Widget2 accessing Controller instance with Get.find().

Bindings

• Overview:

  • Classes for initializing dependencies and binding them to routes in GetX.

  • Separates dependency initialization from the presentation layer, enhancing code organization.

• Creating a bindings class: ...