What is Dagger in coding?

Dagger is a fully static, compile-time dependency injection framework for Java, Kotlin, and Android. It is an adaptation of an earlier version created by Square and now maintained by Google. Dagger aims to address many of the development and performance issues that have plagued reflection-based solutions.

Is Dagger 2 deprecated?

It’s officially deprecated and you can pretty much ignore it. Google’s framework, which became dominant in Android ecosystem, was originally called Dagger 2. Sometimes we still refer to it as such, but, in most cases, we simply call it Dagger today.

What is use of Dagger 2 in Android?

Dagger 2 is a compile-time android dependency injection framework that uses Java Specification Request 330 and Annotations. Some of the basic annotations that are used in dagger 2 are: @Module This annotation is used over the class which is used to construct objects and provide the dependencies.

Why do you use Dagger 2?

Dagger 2 walks through the dependency graph and generates code that is both easy to understand and trace, while also saving you from writing a large amount of boilerplate code you would normally need to write by hand to obtain references and pass them to other objects as dependencies.

What is dagger 2 Kotlin?

Dagger2 is a static compile-time dependency injection Framework for Java,Kotlin and Android. It should actually be Dagger, Dagger2 simply implies the second version which was a complete re-write of the DI framework. The earlier version was created by Square. Dagger2 is now maintained by Google.

What is dagger module?

It defines a configuration point for your object graph, where you declare which objects you want to be available for injection and their scopes. As a simple example, let’s say we want a singleton object to be used by any Activity in the app.

What is Android dependency injection?

Dependency injection (DI) is a technique widely used in programming and well suited to Android development. By following the principles of DI, you lay the groundwork for good app architecture. Implementing dependency injection provides you with the following advantages: Reusability of code. Ease of refactoring.

Is Dagger better than Guice?

If you’re working on an Android application, reflection is very slow. This means that using Guice could have a noticeable effect on performance and Dagger is probably the right answer for you. If you’re working on a Java application, then your options are more open.

What is @binds in Dagger?

@Binds helps your code stay efficient. @Provides methods can be instance methods, which require Dagger to instantiate your Module in order to call them. Making your @Provides method static will also accomplish this, but your @Provides method will still compile if you forget the static .

What is Dagger module?

How does the dagger work?

Dagger automatically generates code that mimics the code you would otherwise have hand-written. Because the code is generated at compile time, it’s traceable and more performant than other reflection-based solutions such as Guice. Note: Use Hilt for dependency injection on Android.