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I'm trying to implement Dagger as a dependency injector in an IntelliJ project, but my code is failing on:
import javax.inject.Inject; Intellij is finding the 'javax' package, but not the 'inject' package, so it fails.
I am new to Android, so I apologize if this is a no brainer, but can anyone tell me why the inject package is not being found?
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Package javax. inject. This package specifies a means for obtaining objects in such a way as to maximize reusability, testability and maintainability compared to traditional approaches such as constructors, factories, and service locators (e.g., JNDI).
javax.injectProvides instances of T . Typically implemented by an injector. For any type T that can be injected, you can also inject Provider<T> . Compared to injecting T directly, injecting Provider<T> enables: retrieving multiple instances.
There is a 3rd way to inject dependencies in Java, and it is called Field Injection . The only way for field injection to work is: Mutating the field because it's a non-private and non-final field. Mutating a final/private field using reflection.
The @Inject annotation lets us define an injection point that is injected during bean instantiation. Injection can occur via three different mechanisms. A bean can only have one injectable constructor.
Dagger depends on JSR 330, the Java standard annotations which are used for dependency injection (think: @Inject, @Singleton, etc.).
This is a separate jar that you have to include. If you were using a build system with integrated dependency management (Maven, Gradle, Ant+Ivy, sbt) you'd get this for free. If you're still copying around jars then you have to add it manually.
You can download the latest jar from Maven central (at the bottom).
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