Without replacing previous columns and values/data how to insert values/data in csv fromat in android?

Is there any way, without replacing previous columns and values/d开发者_JAVA百科ata how to insert values/data in csv format in android?.Let me explain in brief what I actually want, I want to create a excel sheet in android for that I am saving the data in csv format because "if I am right saving in csv produce the same output as in excel", But the problem is that whenever I insert the a new data my previous columns and values/data get replaced, which should not to be actually. So any HELP will really be appreciated THANKS A LOT.

Set the append flag to true when doing your file write.