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Improve this question. What were you doing as before? As it stands, you are only executing one request at a time and not executing them in parallel Internally it utilizes the concept of Handler and Looper to perform the action on the main thread.
RxAndroid uses RxJava internally and compiles it. But while using RxAndroid in our project we still add the dependency of RxJava to work with like,.
Note: The reason being is there might be a chance that RxAndroid doesn't have the latest version of RxJava used in the project. RxJava has the power of operators and as the saying goes by, " RxJava has an operator for almost everything ". It would be a long-running task and doing a long-running task on the main thread might lead to unexpected behavior like App Not Responding. So, to do the above-mentioned task we might think to use AsyncTask as our goto solution.
Using RxJava over AsyncTask helps us to write less code. It provides better management of the code as using AsyncTask might make the code lengthy and hard to manage.
Doing it using AsyncTask we might have to do use multiple Asynctask and manage the results in was way where we want to combine all the AsyncTask to return the result as a single response. The below has a starting number of 2 and a range of 5 numbers, so it will print values from 2 to 6. This operator creates an Observable that emits a particular item or sequence of items repeatedly. There is an option to pass the number of repetitions that can take place as well.
The below code will print the same values as the previous range operator but since the repeat is specified as 2, the same values will be printed twice. This operator creates an Observable that emits one particular item after a span of time that you specify.
The below code will emit only once after a 1 second delay. This is part one of the series on RxJava. I hope you enjoyed this article and found it useful, if so please hit the Clap button.
Let me know your thoughts in the comments section. Happy coding! Sign in. Submit Archive About Events droidcon. Exploring RxJava in Android — Introduction. Anitaa Murthy Follow. ProAndroidDev Follow. Written by Anitaa Murthy Follow. Items emitted by an Observable can be transformed, modified, and filtered through Operators before notifying the subscribed Observer object s.
Some of the most common operations found in functional programming such as map, filter, reduce, etc. The code snippet above would take each emission from the Observable and multiply each by 3, producing the stream 3, 6, 9, 12, 15, respectively.
Applying an Operator typically returns another Observable as a result, which is convenient as this allows us to chain multiple operations to obtain a desired result.
Given the stream above, say we wanted to only receive even numbers. This can be achieved by chaining a filter operation. Each operator in the documentation comes along with a visualization on how the Operator affects the stream. Controlling the thread within which operations occur in the Observable chain is done by specifying the Scheduler within which an operator should occur. Essentially, you can think of a Scheduler as a thread pool that, when specified, an operator will use and run on.
By default, if no such Scheduler is provided, the Observable chain will operate on the same thread where Observable subscribe The key difference between the two methods is that Observable subscribeOn Scheduler instructs the source Observable which Scheduler it should run on. The chain will continue to run on the thread from the Scheduler specified in Observable subscribeOn Scheduler until a call to Observable observeOn Scheduler is made with a different Scheduler.
When such a call is made, all observers from there on out i. If you want to jump ahead, the source code is available here. Note that including RxAndroid implicitly also includes RxJava.
It is best practice, however, to always include those two libraries explicitly since RxAndroid does not always contain the most up-to-date version of RxJava. Explicitly including the latest version of RxJava guarantees use of the most up-to-date version.
Create the GitHubRepo data object class.
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