Nesta apresentação é introduzido o conceito de LiveOps, como usso pode ajudar seu app ou game a melhorar e finalizamos com alguns snippets de código Kotlin e recortes do console do Firebase, para a implementação de cenários básicos de LiveOps. Apresentada no AndroidDevConference 2017 Brasil

1. LiveOps para games usando
Firebase
Vítor Bruno de Almeida
Senior Software Engineer
@vb

2. Live Game
Operations

3. Testes passando
Backlog vazio
App publicado

4. Android Dev Conference 2017
CHURN
Source: Quettra, Average retention for Google Play Apps - 2016

5. Android Dev Conference 2017Source: Quettra, Average retention for Google Play Apps - 2016

6. Android Dev Conference 2017Source: AppsFlyer, The State of App Engagement 2017

7. Android Dev Conference 2017
“Retention is the
king.”
Bria Balfour, VP Growth @ HubSpot

8. Android Dev Conference 2017
Retention
Lifetime Value
Tempo de payback
Viralidade

9. Android Dev Conference 2017Source: Quettra, How do the best apps perform - 2016

10. Conteúdo é
essencial
Jogadores ficam engajados por
mais tempo

11. Tempo é
dinheiro
Alto engajamento e retenção
levam a um melhor LTV
=

12. Android Dev Conference 2017
Distribuição
de conteúdo
Ofertas
especiais
Eventos e
competições

13. Firebase

15. Plataforma
Firebase

16. Remote Config
Android Dev Conference 2017

17. Remote Config
Cloud Storage
Android Dev Conference 2017

18. Remote Config
Cloud Storage
Realtime Database
Android Dev Conference 2017

19. Remote Config
Cloud Storage
Realtime Database
Cloud Messaging
Android Dev Conference 2017

20. Remote Config
Cloud Storage
Realtime Database
Cloud Messaging
Cloud Functions
Android Dev Conference 2017

21. Android Dev Conference 2017
Mãos à obra!

22. Android Dev Conference 2017
1. UPDATE FORÇADO
OK

24. fun hasLatestVersion(): Boolean {
return FirebaseRemoteConfig.getInstance()
.getLong("latest_version")
.toInt() == BuildConfig.VERSION_CODE
}
fun onCreate() {
if (hasLatestVersion()) {
launchGameActivity()
} else {
launchForceUpdateDialog()
}
}

25. 2. Caixa de notícias

27. fun onGameStart() {
val latestNewsId = FirebaseRemoteConfig.getInstance()
.getLong("latest_news_id")
if (latestNewsId > loadLastNewsFromDb().id) {
loadNews(latestNewsId, { news -> displayNews(news) })
}
}
fun loadNews(newsId: Long, callback: (newsTitle: News) -> Unit) {
FirebaseDatabase.getInstance().getReference("news")
.child(newsId.toString())
.addListenerForSingleValueEvent {
data -> data.getValue(News::class.java)?.let(callback)
}
}

28. 3. Sincronização
de relógio

29. const functions = require('firebase-functions');
const moment = require('moment');
const cors = require('cors')({origin: true});
exports.date = functions.https.onRequest((req, res) => {
cors(req, res, () => {
res.status(200).send(moment().format());
});
});
https://us-central1-meujogo.cloudfunctions.net/date

30. fun onGameStart() {
getServerTime({ serverTime -> setGameTime(serverTime) })
}
fun getServerTime(callback: (serverTime: Instant) -> Unit) {
"https://us-central1-meujogo.cloudfunctions.net/date".httpGet()
.responseString { request, response, result ->
when (result) {
is Result.Success -> {
callback(Instant.parse(result.getAs()))
}
}
}
}
https://github.com/kittinunf/Fuel

31. 4. Eventos 4. Eventos

33. fun onGameResume() {
FirebaseDatabase.getInstance().getReference("events")
.orderByChild("fim")
.limitToLast(5)
.addListenerForSingleValueEvent { data ->
val now = Instant.now()
data?.children?.find {
val event = it.getValue(EventConfig::class.java)
event.fim.isAfter(now) && event.inicio.isBefore(now)
}?.let {
startNewEvent(it.getValue(EventConfig::class.java))
}
}
}
fun onVictory(gold: Long, xp: Long) {
val event = gameState.currentEvent
player.earnGold(if (event != null) (gold * event.multGold).toLong() else gold)
player.earnXp(if (event != null) (xp * event.multXp).toLong() else xp)
}

34. 5. Ofertas

38. class Item(val sku: String, val image: String)
class Shop {
val items = ArrayList<Item>()
}
private fun onShopOpened(shop: Shop) {
FirebaseDatabase.getInstance().getReference("shop")
.addListenerForSingleValueEvent { data ->
data?.children?.forEach { itemConfig ->
val itemDbKey = FirebaseRemoteConfig.getInstance()
.getString(itemConfig.key)
addItemToShop(itemDbKey, shop)
}
}
}
private fun addItemToShop(dbKey: String, shop: Shop) {
FirebaseDatabase.getInstance().getReference("items")
.addListenerForSingleValueEvent { data ->
data?.child(dbKey)?.getValue(Item::class.java)?.let {
shop.items.add(it)
}
}
}

39. PLANEJAMENTO É ESSENCIAL

40. Android Dev Conference 2017
Obrigado pela presença!
Contato:
vitor@vitordealmeida.com.br
Imagens e ferramentas:
● https://unsplash.com/
● https://www.pexels.com/
● http://typicalhope.tumblr.com/
● http://www.thokamaer.com/
● http://jonasmosesson.se/
● https://romannurik.github.io/SlidesCodeHighlighter/