Various topics have been covered by speakers at Ottawa Android meetings. You can see a few of them listed below. Some even include links to source code and slides from that presentation. 

Some presentations may be outdated and reference old Android APIs and SDKs.

2014

• Google I/O 2014 by Carson Brown (2014-07-16)

• Android 101 - by Marc Meszaros (2014-05-21)

• SQLite Development with Android (SQLite Manager Source) - by Larry Burge (2014-04-16)

• Gradle - by Marc Meszaros (2014-01-15)

2013

• NFC Debug - by James Puderer (2013-11-20)

• REST Clients (Retrofit) - by Marc Meszaros (2013-10-16)

• Photo Apps - by Marc Meszaros (2013-08-21)

2012

• Maven + Android, Building/Deployment Tips & Tricks (src) - by Marc Meszaros (2012-09-26)

• Using the Android Camera API - by David Underwood (2012-09-26)

• Google Play in app purchases - by David Underwood (2012-08-15)

• Maven/Mockito/Robolectric - by Christopher Saunders (2012-08-15)

• 9-patches how do they work (hint: It’s not magic!) (2012-01-18)
• Presenting UI Consistencies using Libraries - by Spencer Elliott (2012-01-18)
• An intro to am - by Christopher Saunders (2012-01-18)

2011

• PhoneGap + JS Libraries Experiences - by Marc Meszaros (2011-10-16)

• ANT 101 & Eclipse/ANT projects - by Marc Meszaros (2011-08-17)

• Intro to the NDK - by James Puderer (2011-05-18)

• Facebook and Twitter integration - by Spencer Elliott (2011-05-18)

• Mobile web app dev using jQuery, jQuery Mobile and livereload - by Christopher Saunders (2011-04-20)

• RESTful web service on Android - by Christopher Saunders (2011-02-16)

• Sexifying your Android UIs - by Christopher Saunders (2011-01-19)

2010

• Working with SQLite - by Christopher Saunders (src) (2010-10-20)

• A Crash Course:Widgets and Services - by James Puderer (src) (2010-10-20)

• Content Providers - by Christopher Saunders (2010-09-15)

• Alarms - by Marc Meszaros (2010-09-15)

• Localytics - by Christopher Saunders (2010-07-21)

• Rooting your Android Device - by Spencer Elliott (2010-06-16)

• App: Mercury (Presentation- by Spencer Elliott (2010-06-16)

• Localisation - by Christopher Saunders (2010-05-19)

• Threads - by Marc Meszaros (2010-05-19)

• Preferences - by Christopher Saunders (2010-03-17)
• Intents - by Marc Meszaros (2010-03-17)