Tutorial - 104,105,106,107,108,109-ExternalData,Spinner,Toast...

http://www.youtube.com/watch?v=tXR0AlhNYxQ

http://www.youtube.com/watch?v=GtWXOzsD5Fw

http://www.youtube.com/watch?v=Oy7v_Pfz0p4

http://www.youtube.com/watch?v=mMTBlnxgv1g

http://www.youtube.com/watch?v=GPGPcBGevx8

http://www.youtube.com/watch?v=l9SzY3fsds8