CODEWITHSUNDEEP
androidkotlin
misterios
misterios

Reputation: 354

lateinit property response has not been initialized

I'm initializing response in init block but is throws exception :/ why ?

lateinit var response: MutableLiveData<List<AccessListItem?>>


init {
       response.value.apply { emptyList<AccessListItem>() }
}

Exception:

kotlin.UninitializedPropertyAccessException: lateinit property response has not been initialized

Upvotes: 3

Views: 2717

Answers (2)

Saurabh Dhage
Saurabh Dhage

Reputation: 1711

what happening is you are setting the value to the field without actually initializing live data

set

init {
       response.value.apply { emptyList<AccessListItem>() }
}

to

  init {
          response = MutableLiveData()
           response.value.apply { emptyList<AccessListItem>() }
    }

Upvotes: 0

Joffrey
Joffrey

Reputation: 37799

You're not initializing response in the init block (you would need response = something). You're actually not even initializing response.value. What you're actually doing is accessing response.value, which requires accessing response, which fails because response is never initialized.

You need to either initialize response in the init block or at the property declaration. Most likely with the MutableLiveData() constructor, or any other way to get the live data.

For instance, you can initialize the property this way:

val response = MutableLiveData<List<AccessListItem?>>()

Note that you don't need lateinit nor var anymore, just a simple val, because you will not need to change response (the live data) itself but only its value.

In order to put some value in it, you then need to set response.value. You can do that with response.value = emptyList(). Now this piece of code can be put in an init block like you tried to do:

val response = MutableLiveData<List<AccessListItem?>>()

init {
    response.value = emptyList()
}

But you can also use the scope function apply to directly perform this operation when initializing the response property:

val response = MutableLiveData<List<AccessListItem?>>().apply {
    value = emptyList()
}

Upvotes: 3

Related Questions