RxJava implementation - scope & detail.

gistfile1.txt

Official : https://github.com/ReactiveX/RxAndroid

Observables/Flowable : https://github.com/balamaci/rxjava-walkthrough#flowable

AsyncTask replacement 

https://medium.com/@kurtisnusbaum/rxandroid-basics-part-1-c0d5edcf6850
https://medium.com/@kurtisnusbaum/rxandroid-basics-part-2-6e877af352

Additional docs:

https://proandroiddev.com/offline-apps-its-easier-than-you-think-9ff97701a73f

Probable changes:

Replace AsyncTask in RecentList to load Recents from DB. [Observables would serve purpose]
Replace AsyncTask in Favourite list to load from SharedPrefs [Observables would serve purpose]
Replace Dialpad TextWatcher with AsycTask
Study possible API query to be transformed.

--
e.g.,

Observable/Flowable/Single well explained - https://android.jlelse.eu/be-reactive-develop-your-next-app-with-rxjava-4f00bfde0020
EditText AutoComplete - https://proandroiddev.com/building-an-autocompleting-edittext-using-rxjava-f69c5c3f5a40
private fun configureAutoComplete() {
  autoCompletePublishSubject
    .debounce(300, TimeUnit.MILLISECONDS)
    .distinctUntilChanged()
    .switchMap { autoCompleteApi.autoComplete(it) }
    .subscribeOn(Schedulers.io())
    .observeOn(AndroidSchedulers.mainThread())
    .subscribe({ result ->
      onAutoCompleteResultReceived(result)
    }, { t: Throwable? -> Timber.w(t, "Failed to get search results") })
}
Observables/Flowable : https://github.com/balamaci/rxjava-walkthrough#flowable
Understanding RxJava Subject — (Publish, Replay, Behavior and Async Subject) - https://blog.mindorks.com/understanding-rxjava-subject-publish-replay-behavior-and-async-subject-224d663d452f
Suitable for Dialpad - https://medium.com/crunching-rxandroid/crunching-rxandroid-intro-c27eb6f009ea
RxJava: convert a listener into an Observable : http://www.andreamaglie.com/2015/rxjava-listener-to-observable/