Scoping Bindings in Hilt: Understanding Component Scopes and Default Behavior

When working with Hilt, it's essential to understand how bindings are scoped to components. In this article, we'll delve into the world of component scopes, default behavior, and how you can use annotations to tailor your binding needs.

In a typical scenario, when using Hilt to make `MyManager` available for injection in an application component, you might assume that Hilt will supply the same instance throughout the entire app. However, this is not necessarily the case. The annotation used in your code tells Hilt where it should inject `MyManager` objects - in this case, the application component and all its children.

For example, consider a guide provided by Google that demonstrates how to use Hilt with a specific scope. This guide shows how Hilt can inject the same instance of an object throughout your entire app. By using the annotation, you're scoping your Hilt binding to the application component, ensuring that Hilt creates only one instance per component and shares it across all requests.

But what happens when you need a new instance each time your app requests a binding? Hilt allows you to scope a binding to a particular component, creating a new instance of the needed type every time. This flexibility is valuable in situations where you require unique instances for different components or screens.

By default, all bindings in Hilt are unscoped, which means that Hilt creates a new instance each time it's requested. However, if you want to use the same instance of `MyManager` throughout your app, you'll need to use the annotation. This tells Hilt to share the same instance across all components and requests.

In summary, understanding component scopes and default behavior in Hilt is crucial for effective binding management. By using annotations strategically, you can tailor your bindings to meet specific requirements and ensure that your app runs smoothly with the correct instances of your objects.

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