Some Android Advance Concept Links

1) Android Content Providers :

http://tutorials-android.blogspot.in/2012/04/create-custom-or-own-content-provider.html

Details Explanation about Content providers :

https://thenewcircle.com/s/post/1375/android_content_provider_tutorial

2). Drawing with XML. 

Drawing with XML means create Some Custom Button with user defined colors and user defined Back grounds using XML 

 http://tutorials-android.blogspot.in/2011/03/android-button-highlight.html

3) CANVAS Drawing Example ( this is Some sample project )

http://tutorials-android.blogspot.in/2013/11/android-simple-hand-drawing-on-canvas.html

4)  Working with Google maps Extensions. ( this is Sample Basic Application )

http://www.androidhive.info/2013/08/android-working-with-google-maps-v2/

5) Managing HTTP Calls. 

http://www.vogella.com/articles/AndroidNetworking/article.html

6)

A)  Make phone call 

http://tutorials-android.blogspot.in/2012/04/how-to-make-phone-call-from-your.html

b) Send SMS 

http://tutorials-android.blogspot.in/2013/11/how-to-send-sms-message-in-android.html

C) Check Network Connection 

http://tutorials-android.blogspot.in/2011/09/android-how-to-check-network-statusboth.html