BDigital Apps 2011 - Workshop: Android

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. › “fastDovePush”
› Who we are?
App for this demo
› open source

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
› An
application on an Android device doesn’t
need to be running to receive messages

7. › It
does not provide any built-in user interface or
other handling for message data
› It
requires devices running Android 2.2 or higher
that also have the Market application installed
› It
uses 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. › 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

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