Convert epoche in time ago

It's a very simple to compare given server time format with current system time :

package com.example.timestampago;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class MainActivity extends AppCompatActivity {
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Long timestamp_data = 1537090000L;
        String converted_formate=GetTimeAgoDate(timestamp_data);
    }

    private String GetTimeAgoDate(Long timestamp_data) {
        String final_converted_time = null;

        DateFormat needed_format = new SimpleDateFormat("MM/dd/yyyy HH:MM:SS");

        ///convert time stamp in simple date format
        Date date = new Date(timestamp_data);
        String our_dateformated = needed_format.format(date);

        //get current time in simple date format
        Calendar calendar = Calendar.getInstance();
        String system_dateformated = needed_format.format(calendar.getTime());

        //Now convert our_dateformated and system_dateformated  from string to Date
        Date our_time = null;
        Date system_time = null;
        try {
            our_time = needed_format.parse(our_dateformated);
            system_time = needed_format.parse(system_dateformated);
        } catch (ParseException e) {
            e.printStackTrace();
        }

        long time_diffrence = system_time.getTime() - our_time.getTime();
        long second_diffrence = time_diffrence / 1000;
        long minute_diffrence = time_diffrence / (60 * 1000) % 60;
        long hour_diffrence = time_diffrence / (60 * 60 * 1000) % 24;
        long day_diffrence = time_diffrence / (24 * 60 * 60 * 1000);
        long year_diffrence = time_diffrence / (24 * 60 * 60 * 1000) / 365;

        //get final diffrence

        if (year_diffrence > 0) {
            if (year_diffrence == 1) {
                final_converted_time = year_diffrence + "year ago";
            } else {
                final_converted_time = year_diffrence + "years ago";
            }
        } else {
            if (day_diffrence > 0) {
                if (day_diffrence == 1) {
                    final_converted_time = day_diffrence + "day ago";
                } else {
                    final_converted_time = day_diffrence + "days ago";
                }
            } else {
                if (hour_diffrence > 0) {
                    if (hour_diffrence == 1) {
                        final_converted_time = hour_diffrence + "hour ago";
                    } else {
                        final_converted_time = hour_diffrence + "hours ago";
                    }
                } else {
                    if (minute_diffrence > 0) {
                        if (minute_diffrence == 1) {
                            final_converted_time = minute_diffrence + "minute ago";
                        } else {
                            final_converted_time = minute_diffrence + "minutes ago";
                        }
                    } else if (second_diffrence > 0) {
                        if (second_diffrence == 1) {
                            final_converted_time = second_diffrence + "second ago";
                        } else {
                            final_converted_time = second_diffrence + "seconds ago";
                        }
                    }
                }
            }
        }
        return final_converted_time;
    }
}

If you have any suggestion/doubt please text in commentbox. Thanks.