Convert milliseconds to hour / minute / seconds on Android

You have several problems, the first one without a doubt is to define the correct import that should be:

import java.util.concurrent.TimeUnit;

This to use the class and its constant:

 TimeUnit.MILLISECONDS

The second is that it is incorrectly calculated the hours, the necessary argument is missing. The format that I add must be the correct one for the format you want:

String FORMAT = "%02d/%02d/%02d";
String  myTime =  String.format(FORMAT,
                //Hours
                TimeUnit.MILLISECONDS.toHours(millisUntilFinished) -                        TimeUnit.DAYS.toHours(TimeUnit.MILLISECONDS.toDays(millisUntilFinished)),
                //Minutes
                TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) -
                        TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millisUntilFinished)),
                //Seconds
                TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
                        TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)));

Another method that is simpler to obtain the desired format would be this:

Date date = new Date(millisUntilFinished);
SimpleDateFormat formatter = new SimpleDateFormat("HH/mm/ss");
String myTime = formatter.format(date );

For both options, as an example a time defined as 05:25:25 PM would be obtained:

17/25/25

The class you're looking for is java.util.concurrent.TimeUnit . You are probably using the class TimeUnit of the% package android.icu.util that does not contain MILLISECONDS .

Change:

import android.icu.util.TimeUnit;

By:

import java.util.concurrent.TimeUnit;