Rxify

Started with a simple demo for the talk at droidconIN 2016, Banglore. Added more examples from GDG New Delhi Meetup. Will keep adding more demos and new things here :)

• For more information, checkout multi-part Rxify blog series on medium.
• For the video of this talk click here
• For the slides click here
• Slides for the Codelab can be found here

Project Structure

This project :

• Uses RxJava2 for the demos.
• Follows the MVP architecture inspired by repository.
• Makes use of Dagger2
• Uses Butterknife
• Uses TestScheduler for writing tests.

Zip-yosa (ZipActivity)

Perform API calls asynchronously and wait for the result of both the calls to combine the result. For more information, checkout this article.

• We are waiting for FluxWeed API call.

• We are also waiting for Student API call to get hair of Crab.

• Both the calls executing asynchronously.

• Problem :

  • Initialise PolyJuice from the results of API calls.
  • Hide the loader after both calls have completed.

  Here's the demo :

  

Preserving Order in AutoComplete-Search (LibraryActivity)

Depicting the problem of Ordering the results in Auto-Search and solving it using concatMap(). For more information, checkout this article

• Perform Auto-Complete Search using flatMap() - results in unordered results
• Toggle state to fix it using concatMap()
• used BookDataSource and calling getBooks(query) on the data source return the results after a delay which is inversely proportional to the length of query string. - this is done to depict the ordering problem
• used the open-source library used at my current company Fueled - reclaim which extracts the boiler plate for creation of recyclerview adapter, implementation of MVP for listview items.

Using flatMap() - Order is not maintained.

Using concatMap() - Order is maintained.

Ordering problem is fixed, but we shouldn't be updating the list this frequently. switchMap() will improve the results even further :

Using switchMap() - Order is maintained.

Code-lab

This is the code-lab I conducted at the GDG New Delhi January meetup. SpeakerDeck for this is available here. Completed examples for all the operators are also available on the master branch. For in-detail commit-by-commit codelab. Refer to the codelab branch.

Pre-requisites :

• Android Studio IDE
• git
• Lots of excitement.

Let's Get Started

• Switch to branch codelab.
• Checkout at the starting commit : SHA - d5db64950f1616c308bb8174bb8dc01ab69971e8.
• List of all the commits is here.
• Open ChillActivity and switch to the desired presenter.
• Let's Get Started!! Following Excercises are available :

Section 1 - Basic Spells :

• EmptyPresenter
• ErrorPresenter
• FromPresenter
• IntervalPresenter
• IntervalRangePresenter
• JustPresenter
• NeverPresenter
• RangePresenter
• TimerPresenter


Section 2 - To-Do Section :

• AssignmentPresenter
• BattleFlowPresenter
• BattlePresenter
• DistinctPresenter
• FilterPresenter
• FlatMapPresenter
• MapPresenter
• ReducePresenter
• SkipPresenter
• TakePresenter
• TakeUntilPresenter

Section 3 - Threading :

• ThreadingPresenter

Section 4 - Testing :

• EmptyPresenter
• NeverPresenter
• MagicalRemoteDataSourceTest

TO-DO

• Implement more demos.