This document discusses push notifications and Android Cloud to Device Messaging (C2DM). It explains that C2DM allows servers to send lightweight messages to Android apps even when the apps are not actively running. The document provides steps for apps to register with C2DM, receive registration IDs, get messages, and handle the messages within the app. Code snippets demonstrate integrating C2DM into the Android manifest and implementing a C2DM receiver.

1. Fernando Cejas - @fernando_cejas
Fernando García - @fegabe

2.  Introduction
 What’s Push?
 Push vs. Poll
 Cloud to device messaging
 Android Implementation
 Build your app
?
 F.A.Q

3.  “fastDove Push”
 Who we are?
App for this demo
 http://bit.ly/ac2dm_sample

4. Push technology, or server push, describes a style of Internet-
based communication where the request for a given
transaction is initiated by the publisher or central server.
 Harder to implement
 Less battery consumption
 Constant connection

5. Push me your news!
Any news?
No!
Any news?
No!
Any news?
No! New News!
content!
Any news?
Yes! (News)
 Transfer
content as soon as available
 Save device battery
 Reduce data traffic for user

6.  HaIt
allows third-party application servers to
send lightweight messages to their Android
applications
 C2DM makes no guarantees about delivery or
the order of messages
 Anapplication on an Android device doesn’t
need to be running to receive messages

7.  Itdoes not provide any built-in user interface or
other handling for message data
 Itrequires devices running Android 2.2 or higher
that also have the Market application installed
 Ituses an existing connection for Google
services

8. 1. Register device for Push 3. Device receives message
2. App server send message 4. Unregister device

9.  Requesting a Registration ID
C2DMessaging.register(this, "sender@gmail.com");

10.  Receiving the Registration ID
public class C2DMReceiver extends C2DMBaseReceiver {
public C2DMReceiver() {
super("sender@gmail.com");
}
@Override
public void onRegistered(Context context, String registrationId) {
// TODO send registration ID to the app server
}
...
}

11.  Receiving Messages
public class C2DMReceiver extends C2DMBaseReceiver {
...
@Override
protected void onMessage(Context context, Intent intent) {
String payload = intent.getStringExtra("payload");
// TODO handle the message
}
}

12.  Android Manifest
<application>
...
<!-- required for AC2DM -->
<service android:name="com.fastdove.sample.ac2dm.C2DMReceiver" />
<receiver
android:name="com.google.android.c2dm.C2DMBroadcastReceiver"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.fastdove.sample.ac2dm" />
</intent-filter>
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<category android:name="com.fastdove.sample.ac2dm" />
</intent-filter>
</receiver>
<!-- END required for AC2DM -->
</application>

13.  Android Manifest
<application>
...
</application>
<!-- required for AC2DM -->
<permission
android:name="com.fastdove.notifications.demo.permission.C2D_MESSAGE"
android:protectionLevel="signature" />
<uses-permission android:name="com.fastdove.notifications.demo.permission.C2D_MESSAGE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<!-- END required for AC2DM -->

14.  Request Authorization Token
$ curl https://www.google.com/accounts/ClientLogin -d
accountType=GOOGLE -d source=Google-cURL-Example -d
service=ac2dm -d Email=sender@gmail.com -d "Passwd=***"
 Send Message
$ curl --header "Authorization: GoogleLogin auth=authorization_id"
"https://android.apis.google.com/c2dm/send" -d
registration_id=device_registration_id -d "data.payload=your
message" -d collapse_key=something

17. http://www.fastdove.com/
@fastdove
@fastdovedev
info@fastdove.com
Fernando Cejas - @fernando_cejas
Fernando García - @fegabe

18. Say thanks to the people I got
information from:
@johanni
@vogella