Android : dynamic creation of edittext when a key is pressed

I am new to android, I want to create a edit text when user click on any alphabet key in keyboard, Actually my intention is I want to display all contacts in a list view, then if user wants to see filtered names like name starts with a,b or c...so if user click on any alphabet key I want to display that alphabet related names only in list view, can any one help me ?, Thanks in advance .