I got answser by spannable method.
With in spanable method i am comparing string with pattern so whenever that pattern matches in text, it will show emoji of relavent pattern.
I called this method when ever i selected emoji from gridview, on msg recieved, and ontextchanged so whenever it found pattern it will changed to emoji. so like this it is saving data in text formate of :) and showing emoji as icon.
Hope this will be helpful.