The document discusses Android and Google+. It provides an overview of the Android software stack including the operating system, middleware, applications, and supported media. It then summarizes the Google+ social network and API, explaining how to register an application, obtain access tokens, integrate the Google API client library and Google+ API library for Java, and presents sample code.

1. Christos Papazafeiropoulos
Co-Founder & CTO
christos@imellon.com - @cpapazaf
Android & Google+
5th GTUG, Athens, Greece
22 Nov 2011

2.  Android is a software stack for mobile devices that
includes an operating system, middleware and
applications
 Linux version 2.6
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3.  Application framework
 Dalvik virtual machine
 Integrated browser, WebKit
 Custom 2D, 3D
 SQLite
 Media support (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF)
 Telephony (hardware dependent)
 Bluetooth, EDGE, 3G, and WiFi (hardware dependent)
 Camera, GPS, compass, and accelerometer (hardware dependent)
 Development environment:
◦ device emulator,
◦ tools for debugging,
◦ memory and performance profiling,
◦ plugin for the Eclipse IDE
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4. http://www.sliderocket.com/blog/2011/09/presentation-google-plus/
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5.  5 – 10 M downloads
 Not available in Greece yet
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6.  Google+ API (https://developers.google.com/+/api/ )
◦ People
 People is a list of person resources, each of which represents a Google+ user
 Get a person's profile
 Search all public profiles
 List all of the people in the specified collection for a particular activity
◦ Activities
 An activity is a note that a user posts to their stream
 List all of the activities in the specified collection for a particular user
 Get an activity
 Search public activities
◦ Comments
 A comment is a reply to an activity
 List all of the comments for an activity
 Get a comment
 Test it at:
◦ https://code.google.com/apis/explorer/#_s=plus&_v=v1
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7.  Step 1 (Register an Application)
◦ https://code.google.com/apis/console
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8.  Step 2 (Get the access tokens)
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9.  Step 3 (Get the Libraries)
◦ Google APIs Client Library for Java
 A flexible, efficient, and powerful Java client library for
accessing GoogleAPIs
 http://code.google.com/p/google-api-java-
client/downloads/list
◦ Google+ API Library for Java
 The Google+ API is the programming interface to Google+
 Note: The Google+ API currently provides read-only access
to public data
 All API calls require either an OAuth 2.0 token or an API key
 http://code.google.com/p/google-api-java-
client/wiki/APIs#Google+_API
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10.  Step 4 (Use the Libraries)
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11.  Step 5 (Sample Code)
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12.  Google plus
◦ https://plus.google.com
 Google APIs console
◦ https://code.google.com/apis/console
 Google Clients java library
◦ http://code.google.com/p/google-api-java-client
 Google+ API
◦ https://developers.google.com/+/api/
 Google+ API Explorer
◦ https://code.google.com/apis/explorer/#_s=plus&
_v=v1
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