CODEWITHSUNDEEP
androidkotlinanko
yasin
yasin

Reputation: 1307

Anko. Running async layout modifications

I'm trying to add a button to my activity using anko. I know is possible using RxJava (I've done that). I want to know how to do that using Anko and asynchronous. The code works when is running on a synchronous thread.

class MainActivity : AppCompatActivity() {
    fun someMethod(){
        async(UI) {
            bg {
                var button = Button(this@MainActivity)
                button.background = [email protected](R.drawable.ic_action_balloon)
                myFrame.addView(button)
            }
        }
     }

When I build the code, I get this error:

Error:(32, 17) Val cannot be reassigned

Error:(32, 55) Unresolved reference: getDrawable

Upvotes: 1

Views: 251

Answers (2)

Zoltán Tankó
Zoltán Tankó

Reputation: 35

You can only modify Views from the UI thread (bg runs on a different thread).

I tried your code, it compiles but does nothing.

Also, if you don't want to return anything from that coroutine, use launch instead of async.

Anyway, drop the bg and it should work. Didn't you, by chance, mean to do something like this?

launch(UI) {
    val someJob = bg {
        //Do some work here
        someResult
    }
    doWhateverWithUI(someJob.await())
}

Upvotes: 0

Fredy Mederos
Fredy Mederos

Reputation: 2636

The function activity.getDrawable was introduced in the API 21. You should use activity.resources.getDrawable instead.

Upvotes: 1

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