What are the differences between the Provides and Binds annotations in Dagger, and in which situations are they recommended?

In Dagger, the annotations @Provides and @Binds are used to specify how dependencies are created, but they differ in implementation and usage.

• @Provides is applied to methods in modules and allows explicit description of object creation logic. It is a regular method that can contain arbitrary code, such as creating an object with parameters or performing additional actions.

• @Binds is used to bind an interface to a specific implementation. A method with @Binds must be abstract and simply return the implementation of the interface. This is a more efficient way because it does not generate additional code for object creation, but simply informs Dagger that when the interface is requested, a specific class should be used.

Usage recommendations:

• Use @Binds when you need to bind an interface to an implementation and the object can be created directly (e.g., via a constructor with @Inject).
• Use @Provides when object creation requires additional logic, parameters, or cannot use a constructor with @Inject.

Example:

@Module
abstract class MyModule {
    @Binds
    abstract MyInterface bindMyInterface(MyImplementation impl);
}

@Module
class MyModule {
    @Provides
    MyObject provideMyObject() {
        return new MyObject("param");
    }
}