CODEWITHSUNDEEP
androidkotlinrx-java2
Tom
Tom

Reputation: 1507

RxJava2, Android, Webview Create Observable in Kotlin

Just getting started with trying to "Rx-ify" some of Android's Webview events.

class PageStartData(val url: String, val favicon: Bitmap?)

myWebview.webViewClient = object: WebViewClient() {

   val pageStartEvents: Observable<PageStartData> = Observable.create{ emitter->
      override fun onPageStarted(view: WebView, url: String, favicon: Bitmap){
          emitter.onNext(PageStartData(url, favicon))
      }
   }

}

And I have found that the onPageStarted function is out of scope in the emitter lambda function. Very simple, I'm sure. How to fix?

All help appreciated.

Upvotes: 0

Views: 625

Answers (2)

Akaki Kapanadze
Akaki Kapanadze

Reputation: 2672

Check this:

sealed class WebViewEvent {
    data class PageStartData(val url: String?,
                             val favicon: Bitmap?) : WebViewEvent()
}

...

class RxWebViewWrapper(private val webView: WebView) : ObservableOnSubscribe<WebViewEvent> {
    override fun subscribe(emitter: ObservableEmitter<WebViewEvent>) {
        webView.webViewClient = object :WebViewClient(){
            override fun onPageStarted(view: WebView?,
                                       url: String?,
                                       favicon: Bitmap?) {
                super.onPageStarted(view, url, favicon)
                emitter.onNext(WebViewEvent.PageStartData(url, favicon))
            }
        }
    }
}

...

val source = Observable.create<WebViewEvent>(RxWebViewWrapper(myWebview))

Upvotes: 3

Andrei Tanana
Andrei Tanana

Reputation: 8442

It can be done via PublishSubject

myWebview.webViewClient = object : WebViewClient() {
        private val pageStartSubject = PublishSubject.create<PageStartData>()
        val pageStartEvents: Observable<PageStartData> = pageStartSubject

        override fun onPageStarted(view: WebView, url: String, favicon: Bitmap) {
            pageStartSubject.onNext(PageStartData(url, favicon))
        }
    }

Upvotes: 1

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