GCM GOOGLE CLOUD MESSAGING

Transcription

1 GCM GOOGLE CLOUD MESSAGING By +Dennis Geurts

2 ABOUT ME +Dennis Geurts Software Architect at Luminis Co-organizer Dutch Android User Group

3 LUMINIS 120+ skilled colleages software and interaction design Arnhem, Apeldoorn, Rotterdam,...

4 DUTCH AUG +Johan Pelgrim, +Wiebe Elsinga, +Hugo Visser and me Started november 2011 Foundation since feb 2013 GDG since may 2013 Dutch focus, Dutch spread

5 MAIN SPONSORS

6 SOCIAL MEDIA / #dutchaug +The Dutch Android User Group The Dutch Android User Group

7 UPCOMING EVENTS June 27th Proguard and Jenkins Amersfoort August? Social meetup Utrecht

8 OVERVIEW 1. What is GCM 2. Why you should use GCM 3. Third party server role 4. How to use GCM 5. Pitfalls 6. Google I/O new features(!)

9 WHAT IS GCM

10 GOOGLE CLOUD MESSAGING leverages in-app push notifications queueing and delivery handled by GCM the Android app does not have to be active

11 GOOGLE CLOUD MESSAGING similar to Apple Push Notification Service multicast message support

12 GOOGLE CLOUD MESSAGING send payload data send notifications ('send-to-sync') blazingly fast

13 GOOGLE CLOUD MESSAGING payload maximum 4K message discarded after 4 weeks message can be overwritten [collapsed] delay message delivery

14 GOOGLE CLOUD MESSAGING STATS...

15 WHY SHOULD YOU USE GCM PUSH VS PULL APPLICATION FLOW

16 PUSH VS PULL INSTANT NOTIFICATION POLL FREQUENCY BANDWIDTH USAGE (COSTS) BATTERY USE PULL

17 PUSH VS PULL POLL FREQUENCY INSTANT NOTIFICATION BANDWIDTH USAGE (COSTS) BATTERY USE PULL

18 PUSH VS PULL INSTANT NOTIFICATION BANDWIDTH USAGE (COSTS) PUSH BATTERY USE

19 APPLICATION FLOW SIMPLE LESS CODE MESSAGE DELIVERY NOT GUARANTEED

20 GCM FLOW

21

22 CREATE A GOOGLE API PROJECT

23 GOOGLE API PROJECT ENABLE GCM SERVICE NOTE THE PROJECT ID NOTE THE API ACCESS KEY

24 THE THIRD PARTY SERVER

25 THIRD PARTY SERVER ROLE keep track of registered devices send messages through GCM to registered devices depends upon application's purpose

26 TRACK REGISTERED DEVICES totally up to the 3rd party developer Android device must notify 3rd party server

27 INTERACT WITH GCM SERVER HTTP (REST) interface Helper libraries Java Python Node.js...

28 INTERACT WITH GCM SERVER JAVA GIST //create GCM the message Message msg = new Message.Builder().timeToLive(300).collapseKey("welcome_message");.addData("type", "message").adddata("message", "hello from Mobile Down South").build(); //send GCM the message Sender sender = new Sender(System.getProperty("GCM_KEY")); MulticastResult result = sender.send(msg, regids, 5); //process result...

29 INTERACT WITH GCM SERVER CHECK SERVER RESPONSE canonical ids are returned for out-dated registration ids

30 HOW TO USE GCM THE ANDROID SIDE OF IT... supports Froyo [2.2] and up

31 UPDATE THE MANIFEST... CREATE A PERMISSION <pkg-name>.permission.c2d_message

32 UPDATE THE MANIFEST... USE SOME PERMISSIONS com.google.android.c2dm.permission.receive <pkg-name>.permission.c2d_message INTERNET GET_ACCOUNTS WAKE_LOCK

33 CREATE A RECEIVER AND SERVICE... TO PROCESS INCOMING MESSAGES

34 GOOGLE PROVIDES... GCM.JAR (IN SDK/EXTRAS/GOOGLE/GCM) GCMRegistrar - utility class GCMBroadcastReceiver - complete receiver GCMBaseIntentService - utility service

35 GCM REGISTRAR to register the device to unregister the device track device registration on 3rd party server

36 REGISTER YOUR DEVICE Log.i(TAG, "Mainactivity.register()"); if (!GCMRegistrar.isRegistered(this)) { GCMRegistrar.register(this, getresources().getstring(r.string.gcm_sender_id)); } else if (!GCMRegistrar.isRegisteredOnServer(this)) { //custom class ThirdPartyServerApi.register(this); }

37 GCM BASE INTENT SERVICE onregistered onunregistered onmessage onerror

38 GCM BASE INTENT SERVICE onregistered(context context, String registrationid) { Log.v("GIS", "onregistered()"); //custom code ThirdPartyServerApi.register(this); } onunregistered(context context, String registrationid) { Log.v("GIS", "onunregistered()"); //custom code ThirdPartyServerApi.unregister(this, registrationid); }

39 GCM BASE INTENT SERVICE onregistered onunregistered onmessage onerror

40 ON MESSAGE INTENT EXTRAS contains the payload sent by the 3rd party server

41 WHAT NEXT? USE THE INTENT DATA TO update internal state fetch data from 3rd party server serve a notification to the user

42 PITFALLS BOOK KEEPING

43 BOOK KEEPING track registration ids process canonical ids

44 GOOGLE I/O 2013 NEW FEATURES!! XMPP device push [to 3rd party server] notifications [to multiple devices]

45 GOOGLE I/O 2013

46 GOOGLE I/O 2013 XMPP persistent connection to GCM server asynchronous bi-directional up to 10 connections! ACK / NACK messages

47 GOOGLE I/O 2013 CONTINUOUS CONNECTION

48 GOOGLE I/O 2013 DEVICE PUSH (UPSTREAM)

49 GOOGLE I/O 2013 DEVICE PUSH (UPSTREAM) respond to 3rd party server 'ask' for data no custom HTTP interface required

50 GOOGLE I/O 2013 GoogleCloudMessaging gcm = GoogleCloudMessaging.get(context); String GCM_SENDER_ID = "Your-Sender-ID"; AtomicInteger msgid = new AtomicInteger(); String id = Integer.toString(msgId.incrementAndGet()); Bundle data = new Bundle(); data.putstring("hello", "Mobile Down South"); // "time to live" parameter int ttl = [0 seconds, 4 weeks] gcm.send(gcm_sender_id+"@gcm.googleapis.com", id, ttl, data);

51 GOOGLE I/O 2013 NOTIFICATIONS TO MULTIPLE DEVICES e.g. dismiss [Android] notifications

52 GOOGLE I/O 2013 HELPER LIBRARY available in play services lib backwards compatible to Froyo

53 GOOGLE I/O 2013 NEW FEATURES XMPP not yet available to the general public...

54 ?? THE END?? QUESTIONS