The Challenge Mobile Phone Data in the cloud H OW TO KEEP DATA ON - - PowerPoint PPT Presentation

GOOGLE CLOUD MESSAGING

FOR ANDROID

Bindu Priya Infosys Limited

Image Courtesy: http://developer.android.com/guide/google/gcm

The Challenge

Data in the cloud Mobile Phone

HOW TO KEEP DATA ON YOUR

DEVICE FRESH?

Polling Pushing

Polling is Simple to Implement

Any New Updates? No Any New Updates? No Device Application server

Polling Every 5 min can consume 10% of your battery AND.. Nobody appreciates the apps Nobody appreciates the apps which drains the battery life

• f the Phone

Pushing

Server Informs the phone once the new data is available

Data

Device Application server

C2DM Framework

How many of you have heard about Cloud to Device Messaging Framework

Android Cloud to Device Messaging

Live Score C2DM Score Server Live Score App

Android Cloud to Device Messaging

• Google Account
• Client Login Token
• Sign up Form

Activation Email

• Activation Email
• Initial Quota

Google Cloud Messaging

• Simple to use
• No Client Login Token
• No Signup Form
• No Quotas
• No Quotas
• Takes 4.7ms to deliver

the messages.

Google Cloud Messaging-Building Blocks

• Google account for application registration
• Android Application

GCM Server

• GCM Server
• Your Application Server

How GCM Works

GCM Server

1.Registers Application with GCM and gets the API Key and Project ID

• 4. Sends Registration ID to the server

Phone Application Server

• 1. Create Google API Project
• Go to https://code.google.com/apis/console
• Click on create project and this will generate a

Project ID which will be used as GCM Sender ID.

• 2. Enable GCM Service
• In the main Google APIs Console page,

select Services.

• Turn the Google Cloud Messaging to ON.

In the Terms of Service page, accept the

• In the Terms of Service page, accept the

terms.

• 3. Obtain API Key
• In the main Google APIs Console page, select API Access.
• Click Create new Server key. Either a server key or a

browser key should work .

• 4. Get Registration ID for the device

import com.google.android.gcm.GCMRegistrar; @Override protected void onCreate(Bundle savedInstanceState) { if (GCMRegistrar.getRegistrationId(this).equals(“”)) { if (GCMRegistrar.getRegistrationId(this).equals(“”)) { GCMRegistrar.register(this, “12345678910”); }

• 5. Send Registration Id to server

import com.google.android.gcm.GCMBaseIntentService; public class GCMIntentService extends GCMBaseIntentService { @Override protected void onRegistered(Context ctx, String regId) { protected void onRegistered(Context ctx, String regId) { sendToLiveScoreServer(regId); } }

• 6. Server sends messages to GCM

import com.google.android.gcm.server.*; Sender sender = new Sender(myApiKey); Message message = new Message.Builder().build(); MulticastResult result = sender.send(message, devices, MulticastResult result = sender.send(message, devices, 5);

7.Declare Permissions

<!-- App receives GCM messages. --> <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" /> <!-- GCM connects to Google Services. --> <uses-permission android:name="android.permission.INTERNET" /> <!-- GCM requires a Google account. --> <uses-permission android:name="android.permission.GET_ACCOUNTS" />

Live Score Server GCM Auth REG ID, API Key REG ID, API Key API Key Project ID Live Score App

Message Multicasting

• One Message multiple devices
• Allows up to 1000 devices simultaneously.

GCM Time To Live

• From 0 to 4 weeks
• Messages with TTL as 0 are not stored on

GCM Default value is 4 weeks.

• Default value is 4 weeks.

Summary

• Many Android apps access data in cloud
• Push keeps apps up to date, efficiently
• Android Google Cloud Messaging makes push

simple simple

QUESTIONS?

THANK YOU