I want a custom layout drop down box for my app as if like i am on my homepage and i press a button that’s in center of page and then this layout should appear after i press that button, i tried several other and searched the internet but i was unable to get an idea on how to make a drop down box like this : 
this shows like two kinds of layout first one we pick the date like 12 months in first column , then 1-31 numbers and then the year from 2001-2012, i don’t get and idea that how can make this effect like glassy one i wanted to make like exact same layout as shown here, can any one please suggest me how to implement that coding will me much helpful.
There is an example you can refer this one
http://code.google.com/p/android-wheel/
you can get source from here for that
http://android-wheel.googlecode.com/svn/trunk/
another example
https://github.com/sys1yagi/AndroidPractice/tree/master/DrumPicker/trunk