how can i get online courses in android application development?

You can go to Coursera.org where you can learn Android and many other things (Chemistry, Physics etc).

The nice thing about Coursera that at the end of the course you get a proof (certificate) of achievement. 

 

Here is a link to a course about learning Android Programming. It is a full package (video lectures, forums, assignments and quizs). Give it a try.

 

https://class.coursera.org/android-001

http://developer.android.com/guide/components/index.html

http://www.venturehire.co/course/android-online-training-live-android-app-development

http://thenewboston.org/list.php?cat=6

Three good online platforms for courses on a variety of topics.

1. Coursera

2. Open EDX

3. Udacity

http://www.androidhive.info/ ,, i think this website is very good to start :)

There are many courses offered by "https://www.coursera.org/"

Go to the website and enroll yourself for a course to get all the stuff for an ongoing course OR the course that will be started soon.

 

 

Try the Marakana TV android bootcamp video series, it's quite helpful.
http://www.youtube.com/watch?v=5RHtKIo_KDI&list=SPE08A97D36D5A255F also try Marko Gargenta's book "Learning Android": http://www.amazon.com/Learning-Android-Marko-Gargenta/dp/1449390501

Youtube

Here You Get a lot of Tutorial and Resources Online also you can find books.

yeah, there are so much courses and books  in android ..