Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
RxJava
Search
Douglas Kayama
August 29, 2015
Programming
5
570
RxJava
Palestra apresentada na QCon RJ 2015 e Android Dev Conference iMasters 2015
Douglas Kayama
August 29, 2015
Tweet
Share
More Decks by Douglas Kayama
See All by Douglas Kayama
TensorFlow no Android – v2
douglasdrumond
0
33
BLE
douglasdrumond
0
32
TensorFlow no Android
douglasdrumond
0
25
Firebase or Realm?
douglasdrumond
0
80
Rio Dev Day – Introdução ao Android
douglasdrumond
0
99
Google I/O
douglasdrumond
0
62
Criando apps com alto nível de qualidade (versão longa)
douglasdrumond
0
42
Criando apps com alto nível de qualidade (versão curta)
douglasdrumond
0
29
Primeiros Passos com Google Fit
douglasdrumond
0
190
Other Decks in Programming
See All in Programming
複雑化したリポジトリをなんとかした話 pipenvからuvによるモノレポ構成への移行
satoshi256kbyte
1
990
バッチ処理を「状態の記録」から「事実の記録」へ
panda728
PRO
0
140
After go func(): Goroutines Through a Beginner’s Eye
97vaibhav
0
320
The Flutter Journey of Building a Live Streaming App — With a Side of Performance Tuning
u503
1
110
dynamic!
moro
10
7.1k
組込みだけじゃない!TinyGo で始める無料クラウド開発入門
otakakot
0
160
CSC305 Lecture 01
javiergs
PRO
1
400
Cursorハンズオン実践!
eltociear
2
720
どの様にAIエージェントと 協業すべきだったのか?
takefumiyoshii
2
630
大規模アプリのDIフレームワーク刷新戦略 ~過去最大規模の並行開発を止めずにアプリ全体に導入するまで~
mot_techtalk
0
410
いま中途半端なSwift 6対応をするより、Default ActorやApproachable Concurrencyを有効にしてからでいいんじゃない?
yimajo
2
390
Catch Up: Go Style Guide Update
andpad
0
210
Featured
See All Featured
The Language of Interfaces
destraynor
162
25k
How GitHub (no longer) Works
holman
315
140k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
YesSQL, Process and Tooling at Scale
rocio
173
14k
Why Our Code Smells
bkeepers
PRO
339
57k
Building a Scalable Design System with Sketch
lauravandoore
462
33k
What’s in a name? Adding method to the madness
productmarketing
PRO
23
3.7k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.6k
CSS Pre-Processors: Stylus, Less & Sass
bermonpainter
358
30k
Facilitating Awesome Meetings
lara
56
6.6k
The Cost Of JavaScript in 2023
addyosmani
53
9k
BBQ
matthewcrist
89
9.8k
Transcript
RxJava Douglas Drumond
[email protected]
whoami
None
Por que RxJava? Eventos de UI Eventos do domínio Concorrência
RxJava Observer pattern Iterator pattern Functional programming
Lambda
Retrolambda export JAVA_HOME=/path/java8 export JAVA7_HOME=/path/java7
Retrolambda plugins { id "me.tatarka.retrolambda" version "3.2.2" } android {
compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } }
Retrolambda view.setOnClickListener(new View. OnClickListener() { @Override public void onClick(final View
v) { ... } });
Retrolambda view.setOnClickListener(v -> { });
Básico Observables Subscribers Operadores
Observables Emite itens Chama onNext, onComplete ou onError Hot or
Cold
Subscriber Implementa onNext onComplete onError
Operadores flatMap filter debounce create defer etc
Criando Observable e Subscriber DEMO
Operators Subscribers reagem, não mudam Operadores transformam dados
Operators DEMO
Exemplo com UI DEMO
Mais operadores filter Ex: .filter(query -> !TextUtils.isEmpty(query))
Threads subscribeOn observeOn NewThreadScheduler HandlerThreadScheduler
Rede DEMO
Tratamento de erros Observable.create(...) .map(s -> exception(s)) .map(s -> exception2(s))
.subscribe(new Subscriber<String>() { @Override public void onNext(String s) { Log.d(TAG, s); } @Override public void onCompleted() { Log.d(TAG, "uhu!"); } @Override public void onError(Throwable e) { Log.e(TAG, "ops!"); } });
Ciclo de vida da Activity .cache .unsubscribe ao rodar .subscribe
ao restaurar Use RxLifecycle
Google Play Services https://github.com /mcharmas/Android-ReactiveLocation https://github.com /zmarkan/Reactive-PlayServices
Google Play Services ReactiveLocationProvider locationProvider = new ReactiveLocationProvider(context); locationProvider.getLastKnownLocation() .subscribe(new
Action1<Location>() { @Override public void call(Location location) { doSthImportantWithObtainedLocation(location); } });
Testes @Test public void shouldLoadTwoUsers() throw Exception { TestSubscriber<User> testSubscriber
= new TestSubscriber<>(); databaseHelper.loadUser().subscribe(testSubscriber); testSubscriber.assertNoErrors(); testSubscriber.assertReceivedOnNext( Arrays.asList(user1, user2)) }
Testes https://github.com/ribot/assertj-rx + BlockingObservable
Testes (exemplo) assertThat(observable.toBlocking()). completes(); assertThat(observable.toBlocking()) .completes() .listOfValuesEmitted() .containsExactly("a", "b", "c");
Referências http://reactivex.io/ https://github.com/ReactiveX/RxJava/wiki /Alphabetical-List-of-Observable-Operators https://speakerdeck.com/benjchristensen https://github.com/mutexkid/rxjava-koans
Referências https://github.com/trello/RxLifecycle https://github.com/JakeWharton/RxBinding https://github.com/ReactiveX/RxAndroid/
Código https://github.com/ douglasdrumond/KnightsOfLambdaCalculus
Obrigado
Contato
[email protected]
@douglasdrumond +DouglasDrumond www.cafelinear.com
[email protected]