CODEWITHSUNDEEP
androidkotlinobservablerx-java2
Toni Joe
Toni Joe

Reputation: 8397

Cannot call from() operator on Observable in Kotlin Android

I'm trying to learn RxJava2 for Android using kotlin and I'm following an this good online tutorial. First I added this two lines the gradle.build file:

compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'io.reactivex.rxjava2:rxjava:2.1.3'

The I tried to implement the Observable pattern with this code:

import io.reactivex.Observable

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val observable = Observable.from(arrayOf(1, 2, 3, 4, 5, 6))

    }
}

This is supposed to work easily, but I cannot call from() operator on the Observable (Unresolved reference: from). So basically I'am stuck before I even started. Does any one have any idea what i did wrong?

Upvotes: 2

Views: 785

Answers (2)

Maroš Šeleng
Maroš Šeleng

Reputation: 1640

Besides from* methods there are also extension functions for lists/arrays in rx-kotlin, so you might call for example listOf(...).toObservable()

Upvotes: 1

Kiskae
Kiskae

Reputation: 25573

from was removed in RxJava2 because it had a lot of overloads which might make it not behave as you would expect. It has been split into specific methods like fromArray or fromIterable.

Upvotes: 5

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