Questions tagged [rx-java]
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences
26 questions
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Class for user actions
I implemented a class for relationships with the user (deletion, name change, check for existence), I created this class to remove extra logic from the activity class. Could you talk about how my code ...
- 459
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Android+Firebase testing using Mockito
I have an interactor/usecase class in my application. My application follows MVVM architecture with interactor/usecases responsible for logic (e.g. get data from api-service, store in local-database ...
- 151
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84
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Listing YouTube videos using API with RxJava
I am new to RxJava and have the following code which I use to search YouTube videos via the API and ultimately display them in a list.
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4
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167
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Parsing CAN frames from a ByteArray
Here's my method used for parsing a ByteArray into multiple frames of CAN interface. It works now correctly but it's somewhat ugly in my opinion.
It's written in ...
- 141
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230
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Async Task using RxJava2 in Android
I have tried to create the async task using the RxJAVA2. The code is working fine. WHat enhancement can I do in this code?
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- 131
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489
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About handling data from an API call through RX and Retrofit
I started using Retrofit and RxJava recently and I love it. I am working on an Android project and I am following MVP Repository pattern as specified in Android Architecture Components. I'm still ...
- 135
3
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160
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Getting products for category
I have a PR for a bugfix in which the fix is just 4 characters. In this situation we are invited to make some refactoring on the class that we are touching if possible.
Venkat Subramaniam's advice is ...
- 133
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223
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Dagger 2 test application
I have a complicated Dagger 2 use case on Android, where I have a lot of dependencies, but some of them are really slow to construct. Like 2-3 seconds slow.
My solution was to create an RX ...
- 103
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964
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RxJava2 custom Observable
I'm trying to understand how to bridge receiver-based events to the Reactive world. I asked a question on SO and was pointed to a different approach. The author of that answer (David Karnok) is ...
- 131
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Repository pattern with Specification queries
I'm working on an Android (Java) project which utilizes different analytic metrics (sum of x group by date, sum of x group by id, etc) and I am projecting the data sets into different charts using ...
- 151
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Asynchronous service that publishes a possibly infinite amount of events
I want to implement a service that fetches eyetracking events and publishes them to all subscribers of the stream. The whole thing is supposed to run asynchronously, so it doesn't block the UI thread. ...
- 141
4
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205
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Creating new async tasks
In the past, I have used AsyncTasks to perform network requests for my Android app. I recently switched to RxJava to be able to cancel the requests when the user exits an activity. I have created a ...
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165
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User role Observable
I have a service with these methods:
Observable<User> getUsers();
Observable<Role> getUserRoles(String userId);
For each user, I want to get her ...
- 151
2
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89
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Refactoring App launch sequence using reactive programming
In the SplashActivity of my Android Application, the following sequence of events occur:
Check if Google Play Services is installed
If Google Play Services are ...
- 21
4
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1
answer
5k
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Testing a ViewModel in Android - MVVM with DataBinding
I am using MVVM pattern with databinding. I have written tests. But I want them reviewed. The test is related to JUnit test on the ViewModel.
FeedViewModelTest....
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145
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Finding the mean using RxJava
I'm learning RxJava and this is what I attempted to find the mean of 'n' transactions.
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- 109
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1
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789
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Getting data with RxJava and retrofit
I am using RxJava with retrofit to get data from an API then filtering the data with a for loop in the onNext Method. Is there ...
- 563
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989
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Cache of shared observables (Rx)
So the idea is to maintain a cache of shared Observables - accessible by a key - which if not present will produce one using the given factory.
The underlying shared Observable is accessed via an ...
- 141
3
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1
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105
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RXJava operate on exiting List instead of creating new
I'm dipping my toes in to RXJava for the first time. The function below works just fine but I can't help thinking it can be improved. For instance I'm sure that I'm unnecessarily creating a new ...
- 186
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1
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730
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Finding local C# servers on a Java client using UDP and reactive extensions
This program uses UDP broadcast to find app servers on the local network. When a server receives a client broadcast, it sends a port (integer) to the client which will later be used to create a TCP ...
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270
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Android UI code for a test job
I wrote my first Android UI application for a test job, but it was declined as employer said that he did't like "the code quality". He didn't specify what he meant. But I'm very interesting to know ...
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1
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1k
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Manager for OAuth2 tokens using RxJava
I have a class in my application which manages storage of OAuth2 tokens. There are unauthenticated tokens (in my code, called "application access tokens") which can be used for API calls that do not ...
- 131
3
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551
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Coordinating Threads with Reactive Streams
I just started learning reactive streams with RxJava. After reading a couple of books and a lot of articles our there I am still having trouble understanding how to coordinate multiple threads.
I ...
- 268
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609
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Using combinations of OR and AND filters with RxJava
I'm trying to work out a way to create a combination of OR and AND filters in RxJava. Here's what I've done so far:
...
- 131
4
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1
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689
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Using a Subject to trigger a music list to reload
In my Android app I have a Service that is periodically polling a server for a music playlist XML. For certain occasions I also want to trigger a reload manually.
I am using Retrofit for the server ...
- 143