This document discusses using the Rokon game engine for Android game development. It provides an overview of Rokon's architecture and frameworks, describes how to set up an Android project in Netbeans using Rokon, and covers basics of using Rokon and the Smack XMPP library for multiplayer functionality. Tips are provided on tool choices and ongoing development of Rokon. Links are included for the Android SDK, Rokon engine, Smack library, and other resources.

1. Android game development
Rokon game engine

2. Who am I
Daniele Montagni
Java developer, Android enthusiast
http://twitter.com/dmontagni
http://www.jugroma.it

3. What we’ve done
Gameset:
Tankattack is a turn-based strategy game. The setting is a fixed map and player can
control 2 tanks each game:
Goal of the game:
win the match by destroying all against player's tanks

4. How...
Architecture and frameworks:
• Android platform: 1.6 (2.3)
• Rokon game engine: 1.1.1 (2.0.3)
• Smack libraries: 3.1.0
Tools:
• Android SDK for Mac: 2.1-r5 (r8)
• Netbeans: 6.8 (IntelliJ 10 CE)
• Android plugin for netbeans

5. SDK Tools
Create your emulator through Android SDK and AVD manager
daniele@Daniele-Montagnis-MacBook~/android-sdk-mac_86/tools$./android
Starting Android SDK and AVD Manager...

6. Easy project setup
Create "android" type project into Netbeans
That has this structure
...than click "Run" project

7. Emulator & adb
This will run the
emulator and deploy
logcat through Netbeans show status:

8. Rokon
Rokon basics
public class TankAttack extends RokonActivity {
public void onCreate() {
createEngine(480, 320, true);
}
public void onLoad() {
...
Background background = new TileTextureBackground(atlas,
tileloader.getLayers());
...
Sprite tank = new Sprite(80, 180, spriteTexture);
Hotspot hotspotTank = new Hotspot(tank, 1);
}
public void onEvent(GameEvent event) {
rokon.addSprite(tank);
rokon.addHotspot(hotspotRedTank1);
}
public void onLoadComplete() {
rokon.setBackground(background);
rokon.addSprite(tank);
}

9. Smack
Smack basics:
ConnectionConfiguration connConfig = new
ConnectionConfiguration(host, port, service);
XMPPConnection connection = new XMPPConnection(connConfig);
connection.login(username, password);
Presence presence = new Presence(Presence.Type.available);
connection.sendPacket(presence);
xmppClient.setConnection(connection);
Message msg = new Message(to, Message.Type.chat);
msg.setBody(text);
connection.sendPacket(msg);
Type Format Sample
START START:[ROOM_ID]:[PLAYER_NUMBER] START:234523:1
MOVE 1:[XX]:[YY]:[ROTATION] 1:3:7:4
SHOOT 2:[SENDER]:[TARGET]:[DAMAGE] 2:1:3:500
ACK TRUE TRUE:[TANK_ID] TRUE:2
END GAME END:[ROOM_ID]:[PLAYER_LOSER_NUMBER] END:234523:1

10. Tips & Tricks
• Rokon is under development: things must be
done from scratch!
(ex. TileTextureBackground...)
• Android plugin for Netbeans is not stable
(build.xml must be modified...)
• For rapid development use Eclipse that is
supported by Android community:
http://developer.android.com/sdk/eclipse-adt.html#installing
...or IntelliJ Idea 10CE

11. What’s new?
Game engine IDE
+

12. How’s going our baby?
June 2010
January 2011

13. ...and his toys?
Android market
Free vs. Paid
1 year 6 months

14. Links
• Android SDK:
http://developer.android.com/sdk/index.html
• Rokon:
http://code.google.com/p/rokon/
• Smack xmpp:
http://www.igniterealtime.org/projects/smack
• Netbeans plugin: (old)
http://kenai.com/projects/nbandroid/pages/Install
• Google App Inventor:
http://appinventor.googlelabs.com/about/

15. Thank you
...
B ye