rx-java2

I'm using RxJava2, Kotlin-1.1 along with RxBindings in my project. I have simple login screen with 'login' button disabled by default, I want to enable the button only when username and password edittext fields are not empty. LoginActivity.java Observable<Boolean> isFormEnabled = Observable.combineLatest(mUserNameObservable, mPasswordObservable, (userName, password) -> userName.length() > 0 && password.length() > 0) .distinctUntilChanged(); I'm unable to translate the above code from Java to Kotlin: LoginActivity.kt class LoginActivity : AppCompatActivity() { val disposable =

Can anyone please explain the difference between Observable, Completable and Single in RxJava with clear examples? In which scenario we use one over the others? yosriz Observable is the generic ReactiveX building block, of event source that emits values over time. (and thus exists in every language ReactiveX extended to) in short Observable events are: onNext* (onCompleted | onError)? /(* zero or more ? - zero or 1) Single and Completable are new types introduced exclusively at RxJava that represent reduced types of Observable , that have more concise API. Single represent Observable that emit

I am trying use rxJava, rxAndroid, Retrofit2, and OkHTTP3 to download a file from a URL endpoint. My code is unable to create the call adapter for an "Observable< retrofit2.Response< okhttp3.ResponseBody>>". These methods are new to me so I believe I'm missing an important concept here. Any direction or points is greatly appreciated. FATAL EXCEPTION: main Process: com.example.khe11e.rxdownloadfile, PID: 14130 java.lang.IllegalArgumentException: Unable to create call adapter for io.reactivex.Observable> for method RetrofitInterface.downloadFileByUrlRx at retrofit2.ServiceMethod$Builder

I have two Completable. I would like to do following scenario: If first Completable gets to onComplete , continue with second Completable. The final results would be onComplete of second Completable. This is how I do it when I have Single getUserIdAlreadySavedInDevice() and Completable login() : @Override public Completable loginUserThatIsAlreadySavedInDevice(String password) { return getUserIdAlreadySavedInDevice() .flatMapCompletable(s -> login(password, s)) } You are looking for andThen operator. Returns a Completable that first runs this Completable and then the other completable.

After upgrading Android Studio 3.0 Beta 1 getting the following error. When I downgraded the error disappeared. Studio Build: Android Studio 3.0 Beta 1 Version of Gradle Plugin: 'com.android.tools.build:gradle:3.0.0-beta1' Version of Gradle:.0.0-beta1 Version of Java: 8 OS: MacOSX java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/devtools/build/android/desugar/runtime/ThrowableExtension; at io.reactivex.plugins.RxJavaPlugins.onError(RxJavaPlugins.java:364) at io.reactivex.android.schedulers.HandlerScheduler$ScheduledRunnable.run(HandlerScheduler.java:113) at android.os.Handler

I'm developing an Android app using Clean Architecture and I'm migrating it to RxJava 2.x. I have to make some network requests to a soap service, so I defined the api interface in the domain module: public interface SiginterApi { Observable<User> login(String user, String password); ... Observable<List<Campaign>> getCampaigns(List<Long> campaignIds); } I've read that a network request should be made with " Flowable ", because of the backpressure management since it's a 'cold observable'. On the other hand, I know the result of the request will be success (with the response) or error, so I don