<@U6P03BM0W> I'm guessing a common Android mistake...

# kodein

[salomonbrys]

@dave08 I'm guessing a common Android mistake that I should probably document.
Consider the following code:

val MyActivity : Activity(), KodeinAware {
    val db: Database by instance()
    val manager = MyManager(db)
}

The db value is lazy: it will get fetched only when needed.
However, the manager value is not: it will get created at class initialization.
Because the Kodein instance is located in the Application class, the Activity needs to be properly attached to the application, which is why, in Android, you cannot access to dependencies before onCreate.
In this example, myManager is created at initialization, so it asks for the db value. Because it is its first access, the db value is fetched from Kodein. However, because it is first Kodein access, the Kodein instance itself has to be retrieved from the applicationContext. But, at initialization, the activity is not properly attached ! Hence the exception.