RxJava | RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based prog | Reactive Programming library

 by   ReactiveX Java Version: 3.1.8 License: Apache-2.0

kandi X-RAY | RxJava Summary

kandi X-RAY | RxJava Summary

RxJava is a Java library typically used in Programming Style, Reactive Programming applications. RxJava has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has medium support. You can download it from GitHub, Maven.

RxJava is a Java VM implementation of Reactive Extensions: a library for composing asynchronous and event-based programs by using observable sequences. It extends the observer pattern to support sequences of data/events and adds operators that allow you to compose sequences together declaratively while abstracting away concerns about things like low-level threading, synchronization, thread-safety and concurrent data structures. Learn more about RxJava in general on the Wiki Home. :information_source: Please read the What's different in 3.0 for details on the changes and migration information when upgrading from 2.x. The 2.x version is end-of-life as of February 28, 2021. No further development, support, maintenance, PRs and updates will happen. The Javadoc of the very last version, 2.2.21, will remain accessible. The 1.x version is end-of-life as of March 31, 2018. No further development, support, maintenance, PRs and updates will happen. The Javadoc of the very last version, 1.3.8, will remain accessible.

            kandi-support Support

              RxJava has a medium active ecosystem.
              It has 47056 star(s) with 7697 fork(s). There are 2251 watchers for this library.
              There were 2 major release(s) in the last 6 months.
              There are 15 open issues and 3111 have been closed. On average issues are closed in 16 days. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of RxJava is 3.1.8

            kandi-Quality Quality

              RxJava has 0 bugs and 0 code smells.

            kandi-Security Security

              RxJava has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              RxJava code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              RxJava is licensed under the Apache-2.0 License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              RxJava releases are available to install and integrate.
              Deployable package is available in Maven.
              Build file is available. You can build the component from source.
              Installation instructions, examples and code snippets are available.
              It has 314620 lines of code, 24081 functions and 1887 files.
              It has medium code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed RxJava and discovered the below as its top functions. This is intended to give you an instant insight into RxJava implemented functionality, and help decide if they suit your requirements.
            • Runs the loop .
            • Discards a consumer .
            • Drains all of the items from a queue into a given queue .
            • Returns the cause of this exception .
            • Attempts to connect to the subscriber .
            • Drains all elements from the stream into the downstream .
            • Drains all items from the queue into the queue .
            • Checks memory usage .
            • Complete the stream .
            • Reset all variables .
            Get all kandi verified functions for this library.

            RxJava Key Features

            No Key Features are available at this moment for RxJava.

            RxJava Examples and Code Snippets

            Couchbase - Bulk insert via Java
            Javadot img1Lines of Code : 18dot img1License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            NamedCsvReader.builder().build("header 1,header 2\nfield 1,field 2")
                .forEach(row -> row.getField("header 2"));
            String json = "{\"name\":\"Hassan\",\"age\":23}";
            Person person = new ObjectMapper().readValue(
            How to connect android app to python flask server?
            Javadot img2Lines of Code : 106dot img2License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            package com.co.bicicletas.model.network
            import com.co.bicicletas.model.entities.BodyLoginResponse
            import com.co.bicicletas.model.entities.BodyPassResponse
            import com.co.bicicletas.model.entities.LoginDTO
            import com.co.bicicletas.model.ent
            refCount keeping connection even after an error
            Lines of Code : 7dot img3License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            val connectionObservable = bleDevice
                .refCount(1, 5, TimeUnit.MINUTES)
                .to(RxJavaBridge.toV2Observable()) // optional if you want to stick to R
            Java 11: How to summarize two Single<>> in java?
            Javadot img4Lines of Code : 11dot img4License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            Observable>> amounts = 
                Observable.fromArray(first, second);
            amounts.concatMapSingle(v -> v)
            .mapOptional(v -> v) // RxJava 3
            RxJava style LiveData TestObserver and test extension fails with NullPointerException
            Lines of Code : 87dot img5License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
             * RxJava style [Observer] for [LiveData] to test multiple values or states in container.
             * This class is useful for testing view or action states or order of states if you are using
             * stateful machine.
             * * Use with `InstantTa
            copy iconCopy
            //To add or update a data
            SharedPreferences sharedPref;
            sharedPref = getSharedPreferences("AnyNameForSharedPref", Context.MODE_PRIVATE);
            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putString("name", name);
            Firebase how does the offline cache works?
            Lines of Code : 24dot img7License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            val sharedPref = activity?.getPreferences(Context.MODE_PRIVATE) ?: return
            with (sharedPref.edit()) {
                putInt(getString(R.string.saved_high_score_key), newHighScore)
              def room_version = "2.2.5"
            RxAndroid + Retrofit callTimeout doesn't trigger onError
            Lines of Code : 4dot img8License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            This is now DEPRECATED!
            Retrofit 2.2 and newer have a first-party call adapter for RxJava 2: https://github.com/square/retrofit/tree/master/retrofit-adapters/rxjava2
            Replace Async Task with RxJava
            Javadot img9Lines of Code : 53dot img9License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            private void addTeamInBackground(Team team) {
                Observable.fromCallable(new Callable() {
                    public Boolean call() throws Exception {
                        // RxJava does not accept null ret
            Track how long a user has watched a video android exoplayer
            Lines of Code : 24dot img10License : Strong Copyleft (CC BY-SA 4.0)
            copy iconCopy
            mPlayer.addListener(object : IPlayerEventListener {
                      override fun onPlayerStateChanged(playWhenReady: Boolean, playbackState: Int) {
                           super.onPlayerStateChanged(playWhenReady, playbackState)
                           if (playba

            Community Discussions


            SocketException: java.net.SocketException: socket is closed release build
            Asked 2022-Mar-02 at 18:36

            We are having problems with Android network requests, to be more exact receiving random



            Answered 2022-Feb-25 at 10:33

            You can add code below to pro-guard file:

            Source https://stackoverflow.com/questions/70877944


            Manifest merger failed : android:exported needs to be explicitly specified for
            Asked 2022-Feb-07 at 15:04

            Merging Errors: Error: android:exported needs to be explicitly specified for element . Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. test.app main manifest (this file), line 19

            I don't even know what to do. I struggled with this mistake for a whole week, but I couldn't.

            Here is my sdk version



            Answered 2022-Feb-07 at 14:59

            Source https://stackoverflow.com/questions/71020415


            Send specific request multiple times with different parameters using Retrofit & RxJava
            Asked 2021-Dec-21 at 16:42

            I have n EditTexts with their own texts:

            editText1 -> text: 13

            editText2 -> text: 15

            editText3 -> text: 20


            And there is an API method named as getNewValue(String currentValue). It will get the new value of each EditText due to the current value.

            Scenario: getNewValue() request will be sent if each EditText get focused and the new value will be set on focused EditText.

            How can I achieve this goal using Retrofit, RxJava and ViewModel?

            I tried this code:




            Answered 2021-Dec-21 at 16:42

            I am not very familiar with Android programing, so sorry if I am missing something and make any mistake, but why don't you pass a reference to the EditText that has been focused to the getNewValue method?

            Consider for instance:

            Source https://stackoverflow.com/questions/70334465


            Is there a proper way to chain coroutines Flow?
            Asked 2021-Dec-17 at 13:42

            I am looking for a way to chain several flows in similar way as operations were chained in RxJava. Here is a code of current implementation:



            Answered 2021-Dec-17 at 13:27

            Am not sure why you're using transform and not a map or flatMap, but according to the documentation you have to emit the value from within the transform function, so I'd assume it'd look like:

            Source https://stackoverflow.com/questions/70393476


            MVVM - Having a hard time understanding how to create the Domain layer in Clean Architecture
            Asked 2021-Dec-15 at 14:13

            I'm trying to learn MVVM to make my app's architecture more clean. But I'm having a hard time grasping how to create a "Domain" layer for my app.

            Currently this is how the structure of my project is looking:

            My View is the activity. My ViewModel has a public method that the activity can call. Once the method in the ViewModel is called, it calls a method in my Repository class which performs a network call, which then returns the data back to the ViewModel. I then update the LiveData in the ViewModel so the Activity's UI is updated.

            This is where I'm confused on how to add a Domain layer to the structure. I've read a lot of Stackoverflow answers and blogs about the Domain layer and they mostly all tell you to remove all the business logic from the ViewModel and make a pure Java/Kotlin class.

            So instead of

            View --> ViewModel --> Repository

            I would be communicating from the ViewModel to the Domain class and the Domain class would communicate with the Repository?

            View --> ViewModel --> Domain --> Repository

            I'm using RxJava to make the call from my ViewModel to the Repository class.



            Answered 2021-Dec-15 at 01:50

            I had a hard time while trying to figure out the domain layer. The most common example of it is the use case.

            Your viewmodel won't communicate directly to the repository. As you said, you need viewmodel 》domain 》repository.

            You may think of a usecase as a abstraction for every repository method.

            Let's say you have a Movies Repository where you call a method for a movie list, another method for movie details and a third method for related movies.

            You'll have a usecase for every single method.

            What's the purpose of it?

            Let's say you have a DetailActivity that communicate with a Detail Viewmodel. Your viewmodel doesn't need to know all the repository (what's the purpose of calling a movie list method on you Detail screen?). So, all your DetailViewModel will know is "Detail Usecase " (that calls the Detail method in repository).

            Google has updated the architecture documentation few hours ago, take a look! https://android-developers.googleblog.com/2021/12/rebuilding-our-guide-to-app-architecture.html?m=1&s=09

            PS: Usecase is not a special android class, you do not need to inherent any behavior (as fragment, activity, viewmodel...) it's a normal class that will receive the repository as parameter.

            You'll have something like:


            Source https://stackoverflow.com/questions/70353712


            UseCases or Interactors with Kt Flow and Retrofit
            Asked 2021-Dec-06 at 15:34


            I started working on a new project and I've decided to move from RxJava to Kotlin Coroutines. I'm using an MVVM clean architecture, meaning that my ViewModels communicate to UseCases classes, and these UseCases classes use one or many Repositories to fetch data from network.

            Let me give you an example. Let's say we have a screen that is supposed to show the user profile information. So we have the UserProfileViewModel:



            Answered 2021-Dec-06 at 14:53

            The most obvious problem I see here is that you're using Flow for single values instead of suspend functions.

            Coroutines makes the single-value use case much simpler by using suspend functions that return plain values or throw exceptions. You can of course also make them return Result-like classes to encapsulate errors instead of actually using exceptions, but the important part is that with suspend functions you are exposing a seemingly synchronous (thus convenient) API while still benefitting from asynchronous runtime.

            In the provided examples you're not subscribing for updates anywhere, all flows actually just give a single element and complete, so there is no real reason to use flows and it complicates the code. It also makes it harder to read for people used to coroutines because it looks like multiple values are coming, and potentially collect being infinite, but it's not the case.

            Each time you write flow { emit(x) } it should just be x.

            Following the above, you're sometimes using flatMapMerge and in the lambda you create flows with a single element. Unless you're looking for parallelization of the computation, you should simply go for .map { ... } instead. So replace this:

            Source https://stackoverflow.com/questions/70246942


            Data Class with Nullable Parameter in Kotlin 1.5.0 & 1.6.0 Throwing BackendException
            Asked 2021-Dec-06 at 07:56

            Recently updated from Kotlin 1.4.20 to 1.5.30.

            I have this class which used to compile no problem



            Answered 2021-Dec-06 at 07:56

            My Gradle couldn't find the redacted-gradle-plugin but both of your classes compiles with this minimalistic build.gradle.kts:

            Source https://stackoverflow.com/questions/69643728


            How to delay emitting each item in iterable Spring Boot Flux
            Asked 2021-Nov-24 at 20:23

            My problem is slightly different, but I can describe the issue in the following manner.

            What I would like is some code that emits an item every delay period (3 seconds). But when I hit the /flux URL, the page waits for 3 seconds and gives all 4 items. That means it emits all the items after 3 seconds instead of one item every 3 seconds.



            Answered 2021-Nov-21 at 09:57

            We can tell the reactor to emit an element after a specific delay by using delayElements(Duration delay). It always tries to emit elements after a specific duration without blocking.

            Put this URL in a google chrome browser or any other consumer client like curl instead of the postman.


            Source https://stackoverflow.com/questions/70050658


            Failed to resolve transitive dependencies on JitPack release
            Asked 2021-Nov-06 at 15:42

            I'm working on building an android library and I want to include a dependency of the library as a transitive dependency into my app. Here's my library's build.gradle file:



            Answered 2021-Nov-06 at 15:42

            Jitpack uses ./gradlew install for generating the artifacts.

            Adding an install block and manually appending the dependencies to the pom file worked for me.

            Here's the install block that I added to the module level build.gradle file:

            Source https://stackoverflow.com/questions/68843928


            problem with creating type converter for room database
            Asked 2021-Sep-18 at 03:46

            hey guys I'm trying to make a database with room and I have a data class as Entity Like this:



            Answered 2021-Sep-18 at 03:46

            First. You cannot (I believe) have a val detailList:List?, you need a single (not a List) item.

            So (1) add a new Class that embodies the List e.g. :-

            Source https://stackoverflow.com/questions/69210605

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install RxJava

            The first step is to include RxJava 3 into your project, for example, as a Gradle compile dependency:. (Please replace x and y with the latest version numbers: ).
            Binaries and dependency information for Maven, Ivy, Gradle and others can be found at http://search.maven.org.
            Snapshots after May 1st, 2021 are available via https://oss.sonatype.org/content/repositories/snapshots/io/reactivex/rxjava3/rxjava/. Snapshots before May 1st, 2021 are available via https://oss.jfrog.org/libs-snapshot/io/reactivex/rxjava3/rxjava/ (Note that due to the Sunset of Bintray, our jfrog access has been severed, hence the new snapshot repo above.). JavaDoc snapshots are available at http://reactivex.io/RxJava/3.x/javadoc/snapshot.
            Further details on building can be found on the Getting Started page of the wiki.


            Google Group: RxJavaTwitter: @RxJavaGitHub IssuesStackOverflow: rx-java and rx-java2Gitter.im
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