TimeFormatter.java

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

/**
 * Given a date String of the format given by the Twitter API, returns a display-formatted
 * String representing the relative time difference, e.g. "2m", "6d", "23 May", "1 Jan 14"
 * depending on how great the time difference between now and the given date is.
 * This, as of 2016-06-29, matches the behavior of the official Twitter app.
 */
public class TimeFormatter {
    public static String getTimeDifference(String rawJsonDate) {
        String time = "";
        String twitterFormat = "EEE MMM dd HH:mm:ss ZZZZZ yyyy";
        SimpleDateFormat format = new SimpleDateFormat(twitterFormat, Locale.ENGLISH);
        format.setLenient(true);
	try {
            long diff = (System.currentTimeMillis() - format.parse(rawJsonDate).getTime()) / 1000;
            if (diff < 5)
		time = "Just now";
	    else if (diff < 60)
 		time = String.format(Locale.ENGLISH, "%ds",diff);
	    else if (diff < 60 * 60)
		time = String.format(Locale.ENGLISH, "%dm", diff / 60);
            else if (diff < 60 * 60 * 24)
		time = String.format(Locale.ENGLISH, "%dh", diff / (60 * 60));
	    else if (diff < 60 * 60 * 24 * 30)
		time = String.format(Locale.ENGLISH, "%dd", diff / (60 * 60 * 24));
            else {
	    	Calendar now = Calendar.getInstance();
	        Calendar then = Calendar.getInstance();
	        then.setTime(format.parse(rawJsonDate));
	        if (now.get(Calendar.YEAR) == then.get(Calendar.YEAR)) {
		    time = String.valueOf(then.get(Calendar.DAY_OF_MONTH)) + " "
		    + then.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.US);
	        } else {
		time = String.valueOf(then.get(Calendar.DAY_OF_MONTH)) + " "
		    + then.getDisplayName(Calendar.MONTH, Calendar.SHORT, Locale.US)
		    + " " + String.valueOf(then.get(Calendar.YEAR) - 2000);
	        }
	    }
        }  catch (ParseException e) {
            e.printStackTrace();
        }
        return time;
    }

/**
 * Given a date String of the format given by the Twitter API, returns a display-formatted
 * String of the absolute date of the form "30 Jun 16". 
 * This, as of 2016-06-30, matches the behavior of the official Twitter app. 
 */
    public static String getTimeStamp(String rawJsonDate) {
	String time = "";
	String twitterFormat = "EEE MMM dd HH:mm:ss ZZZZZ yyyy";
	SimpleDateFormat format = new SimpleDateFormat(twitterFormat, Locale.ENGLISH);
	format.setLenient(true);
	try {
	    Calendar then = Calendar.getInstance();
	    then.setTime(format.parse(rawJsonDate));
	    Date date = then.getTime();
	    
	    SimpleDateFormat format1 = new SimpleDateFormat("h:mm a \u00b7 dd MMM yy");
	    
	    time = format1.format(date);
	    
	}  catch (ParseException e) {
	    e.printStackTrace();
	}
	return time;
    }
}