LEVEL UP!
A better gaming experience with Play Games Services
Your speaker: +StefanHoth / @stefanhoth
Player 1 joined
Play Games Services
Inventory
#io13
#io14
C++
All (important) platforms
What's inside?
Achievements!
Leaderboards!
Quests!
Cloud Save!
Multiplayer!
Gifts!
Anti Piracy!
There's an app for that
Level 1
Press play to join
on Android
- Android development environment ready (SDK, IDE, ...)
- A device with Android 2.3+
- Current Google Play Services installed on the device
- Activated Google Play Developer account (US$25)
Step 0
Android SDK Manager
> Extras
> install "Google Repository" &
"Android Support Repository"
Step 1: Set up for gradle
dependencies {
compile 'com.google.android.gms:play-services-games:8.1.0'
//optional for multiplayer matchmaking
compile 'com.google.android.gms:play-services-plus:8.1.0'
//optional for "Nearby Players" matchmaking
compile 'com.google.android.gms:play-services-nearby:8.1.0'
}
Add to build.gradle
Sync!
Step 2: Configure Proguard
<3 Thanks, Google!
https://play.google.com/apps/publish/
Step 3: Google Play Developer Console
Step 4: Add a game
Step 5: Link game
Step 6: Generate OAuth2 client ID
Setup complete!
Level 2
Rewarding players for their engagement
Achievements
States
Incremental achievements
Create an achievement
Check the ids
Code!
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest>
<application>
// Activities, Services etc go here
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<meta-data
android:name="com.google.android.gms.games.APP_ID"
android:value="@string/app_id" />
</application>
</manifest>AndroidManifest.xml
Get a client instance
gamesApiClient = new GoogleApiClient.Builder(activity)
.addApi(Games.API)
.addScope(Games.SCOPE_GAMES)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();Unlock normal achievement
Games.Achievements.unlock(gamesApiClient, "CgkInsXxu-kVEAIQAQ");
// wait, use string resources! Increment achievement
Games.Achievements.increment(gamesApiClient,
"CgkInsXxu-kVEAIQBA", 1);Display achievements
startActivityForResult(
Games.Achievements.getAchievementsIntent(gamesApiClient),
REQUEST_CODE_ACHIEVEMENTS);Display achievements
Level 3
See your global rank or challenge friends
Leaderboards
Create a leaderboard
Code!
Submit a score
Games.Leaderboards.submitScore(
gamesApiClient,
"CgkInsXxu-kVEAIQBw",
1337);Display leaderboard
startActivityForResult(
Games.Leaderboards.getLeaderboardIntent(
gamesApiClient, "CgkInsXxu-kVEAIQBw"
),
REQUEST_CODE_LEADERBOARD);Display leaderboard
Level 4
Track player success and (re)engange users
Events & Quests
Create an event
Create a quest
Reward data
{
"bonusGems": 2134,
"extraSeconds": 12
}Code!
Submit an event update
Games.Events.increment(gamesApiClient, "CgkInsXxu-kVEAIQCQ", 1);Display available Quests
startActivityForResult(
Games.Quests.getQuestsIntent(
gamesApiClient, Quests.SELECT_ALL_QUESTS
),
REQUEST_QUESTS);Level 5
Enable your players to continue
the game on another device
Cloud Save
Google Drive Appfolder
Built-in offline support
Activate Save Games
Save game parts
Unstructured
Structured
{
"id": 123,
"name": "Level 2-3",
"description": "66% already solved",
"last_modified": 1445401740, // timestamp
"played time": 31337, // in ms
"cover_image": 1010101001// bitmap
}Code!
Set the API
// Google API Client with access to Plus, Games, and Drive
gamesApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(Games.API).addScope(Games.SCOPE_GAMES)
.addApi(Plus.API).addScope(Plus.SCOPE_PLUS_LOGIN)
.addApi(Drive.API).addScope(Drive.SCOPE_APPFOLDER)
.build();
Display the saved games
private static final int RC_SAVED_GAMES = 9009;
private void showSavedGamesUI(boolean allowAdd, boolean allowDelete) {
int maxNumberOfSavedGamesToShow = 5;
Intent savedGamesIntent =
Games.Snapshots.getSelectSnapshotIntent(gamesApiClient,
"See My Saves", allowAdd, allowDelete, maxNumberOfSavedGamesToShow);
startActivityForResult(savedGamesIntent, RC_SAVED_GAMES);
}Save game parts
private PendingResult<Snapshots.CommitSnapshotResult> writeSnapshot(Snapshot snapshot,
byte[] data, Bitmap coverImage, String desc) {
}Save game parts
private PendingResult<Snapshots.CommitSnapshotResult> writeSnapshot(Snapshot snapshot,
byte[] data, Bitmap coverImage, String desc) {
// Set the data payload for the snapshot
snapshot.getSnapshotContents().writeBytes(data);
}Save game parts
private PendingResult<Snapshots.CommitSnapshotResult> writeSnapshot(Snapshot snapshot,
byte[] data, Bitmap coverImage, String desc) {
// Set the data payload for the snapshot
snapshot.getSnapshotContents().writeBytes(data);
// Create the change operation
SnapshotMetadataChange metadataChange = new SnapshotMetadataChange.Builder()
.setCoverImage(coverImage)
.setDescription(desc)
.build();
}Save game parts
private PendingResult<Snapshots.CommitSnapshotResult> writeSnapshot(
Snapshot snapshot, byte[] data, Bitmap coverImage, String desc) {
// Set the data payload for the snapshot
snapshot.getSnapshotContents().writeBytes(data);
// Create the change operation
SnapshotMetadataChange metadataChange = new SnapshotMetadataChange.Builder()
.setCoverImage(coverImage)
.setDescription(desc)
.build();
// Commit the operation
return Games.Snapshots.commitAndClose(gamesApiClient, snapshot, metadataChange);
}Game On DevByte
Shortcuts
Attention: Publish twice!
All ids in one go
All ids in one go
Magic?
Boss level
Publishing API
Create & Update
achievements + leaderboards
Management APIs
- Reset scores, achievements, quests etc.
- only for testers and unpublished games
- after release: hide cheaters from leaderboards
/playgameservices/management-tools
Player Analytics
Secret bonus level
Google Tag Manager
GAME OVER
Questions
Play Games Services Docs
https://developers.google.com/games/services/
//TODO: Ropasc Lisc on GitHub
https://github.com/stefanhoth/ropasclisp
Thank You!
Stefan Hoth
stefan@novoda.com
@stefanhoth
+StefanHoth
stefanhoth
Sources
Droidcon London 2015 // LEVEL UP, RELOADED! A BETTER GAMING EXPERIENCE WITH GOOGLE PLAY GAMES SERVICES
By Stefan Hoth
Droidcon London 2015 // LEVEL UP, RELOADED! A BETTER GAMING EXPERIENCE WITH GOOGLE PLAY GAMES SERVICES
Developing games for mobile devices is certainly one of the most lucrative genres today. Google reflected this importance by splitting the "Games" section of the Play Store into sub-catogries to account for the growing market in that area. With Android TV Google even created a whole platform designed for gaming on Android and partners like Nvidia and Razer are joining the party. It's already hard enough to come up with a fresh idea for a new game, make it look good and work on all the target devices. But adding social features like leaderboards, achievements, multiplayer features to compete with friends and offering an easy way to continue a game phone that you started on your tablet is what can catapult a good app to a great one everyone knows. All these features and more you can get with the Google Play Games Services bringing you happier users, higher rentention rates and viral recommendations - all for free and with support for all major platforms. The talk will walk you through the different parts of Google Play Games Services, how to set them up and integrate them with your Android app, mention a few pitfalls and finishes off with a multiplayer live demo of these features - if the demo gods are playing nice. In the end you'll be ready to easily add those features to your app and make your users happy while still having time to focus on what's important: Your game.
