How to format longs in android to always display two digits

Question

I have a countdown timer which shows seconds from 60 to 0 (1 min countdown timer). When it reaches 1 digit numbers such as 9,8,7.. it shows 9 instead of 09. I tried using

Answer 1

You can accomplish it with DecimalFormat:

NumberFormat f = new DecimalFormat("00");
long time = 9;
textView.setText(f.format(time));

Output:

09

Or you can use String.format() as well:

String format = "%1$02d"; // two digits
textView.setText(String.format(format, time));