Can we do constructor injection in service class in android?

Question

here is my Service class

class MyFirebaseMessagingService @Inject constructor(private val repository : Repository) :
    FirebaseMessagingService() {....}

class Repository @Inject constructor(private val apiService: ApiService) {}

and ApiService is Interface

The problem is on the first launch of app. This app is crashing with below message

java.lang.RuntimeException: Unable to instantiate service com.projects.driverapp.MyFirebaseMessagingService: java.lang.InstantiationException: java.lang.Class<com.projects.driverapp.MyFirebaseMessagingService> has no zero argument constructor

But after this crash, on second launch of app , this project works fine without crash, what is the root cause ?

Answer 1

Use @AndroidEntryPoint in your service class and Add field injection (@Inject)

Example:

@AndroidEntryPoint
class YourServiceClass : Service() {

  @Inject lateinit var analyticsRepo: AnalyticsRepository // Replace your class
  ...
}

According to the documentation, it is recommended to annotate services with @AndroidEntryPoint. Typically, services should have a constructor with zero parameters so that they can be initiated using startService().