29

我想以 hh:mm 格式显示两次之间的差异。

第一次来自数据库，第二次是系统时间。时差每秒更新一次。

我怎样才能做到这一点？

目前我正在使用两个手动时间，如果这可以完美运行，那么我将它实施到我的应用程序中。

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

        Timer updateTimer = new Timer();
        updateTimer.schedule(new TimerTask() 
        {
            public void run() 
            {
                try 
                {
                    TextView txtCurrentTime= (TextView)findViewById(R.id.mytext);
                    SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss aa");
                    Date date1 = format.parse("08:00:12 pm");
                    Date date2 = format.parse("05:30:12 pm");
                    long mills = date1.getTime() - date2.getTime();
                    Log.v("Data1", ""+date1.getTime());
                    Log.v("Data2", ""+date2.getTime());
                    int hours = (int) (mills/(1000 * 60 * 60));
                    int mins = (int) (mills % (1000*60*60));

                    String diff = hours + ":" + mins; // updated value every1 second
                    txtCurrentTime.setText(diff);
                } 
                catch (Exception e) 
                {
                    e.printStackTrace();
                }
            }

        }, 0, 1000);
    }
}
4

9 回答 9

53

要计算两个日期之间的差异，您可以尝试以下操作：

long millis = date1.getTime() - date2.getTime();
int hours = (int) (millis / (1000 * 60 * 60));
int mins = (int) ((millis / (1000 * 60)) % 60);

String diff = hours + ":" + mins;

要每秒更新时差，您可以使用 Timer。

Timer updateTimer = new Timer();
updateTimer.schedule(new TimerTask() {
    public void run() {
        try {
            long mills = date1.getTime() - date2.getTime();
                int hours = millis/(1000 * 60 * 60);
                 int mins = (mills/(1000*60)) % 60;

                 String diff = hours + ":" + mins; // updated value every1 second
            } catch (Exception e) {
            e.printStackTrace();
        }
    }

}, 0, 1000); // here 1000 means 1000 mills i.e. 1 second

编辑：工作代码：

public class MainActivity extends Activity {

    private TextView txtCurrentTime;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        txtCurrentTime= (TextView)findViewById(R.id.mytext);
        Timer updateTimer = new Timer();
        updateTimer.schedule(new TimerTask() 
        {
            public void run() 
            {
                try 
                {
                    
                    SimpleDateFormat format = new SimpleDateFormat("hh:mm:ss aa");
                    Date date1 = format.parse("08:00:12 pm");
                    Date date2 = format.parse("05:30:12 pm");
                    long mills = date1.getTime() - date2.getTime();
                    Log.v("Data1", ""+date1.getTime());
                    Log.v("Data2", ""+date2.getTime());
                    int hours = (int) (mills/(1000 * 60 * 60));
                    int mins = (int) (mills/(1000*60)) % 60;

                    String diff = hours + ":" + mins; // updated value every1 second
                    txtCurrentTime.setText(diff);
                } 
                catch (Exception e) 
                {
                    e.printStackTrace();
                }
            }

        }, 0, 1000);
    }
于 2013-03-12T11:51:41.330 回答
10

终于做到了 yuppiieeee ...

package com.timedynamicllyupdate;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;

public class MainActivity extends Activity 
{
    TextView current;
    private TextView txtCurrentTime;
    @Override
    protected void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Thread myThread = null;
        Runnable myRunnableThread = new CountDownRunner();
        myThread= new Thread(myRunnableThread);   
        myThread.start();

        current= (TextView)findViewById(R.id.current);
    }


    public void doWork() 
    {
        runOnUiThread(new Runnable() 
        {
            public void run() 
            {
                try
                {
                    SimpleDateFormat sdf = new SimpleDateFormat("hh:mm:ss aa");

                    txtCurrentTime= (TextView)findViewById(R.id.mytext);

                    Date systemDate = Calendar.getInstance().getTime();
                    String myDate = sdf.format(systemDate);
//                  txtCurrentTime.setText(myDate);

                    Date Date1 = sdf.parse(myDate);
                    Date Date2 = sdf.parse("02:50:00 pm");

                    long millse = Date1.getTime() - Date2.getTime();
                    long mills = Math.abs(millse);

                    int Hours = (int) (mills/(1000 * 60 * 60));
                    int Mins = (int) (mills/(1000*60)) % 60;
                    long Secs = (int) (mills / 1000) % 60;

                    String diff = Hours + ":" + Mins + ":" + Secs; // updated value every1 second
                    current.setText(diff);
                }
                catch (Exception e) 
                {

                }
            }
        });
    }

    class CountDownRunner implements Runnable
    {
        // @Override
        public void run() 
        {
            while(!Thread.currentThread().isInterrupted())
            {
                try 
                {
                    doWork();
                    Thread.sleep(1000); // Pause of 1 Second
                } 
                catch (InterruptedException e) 
                {
                        Thread.currentThread().interrupt();
                }
                catch(Exception e)
                {
                }
            }
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) 
    {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}
于 2013-03-13T09:39:27.463 回答
7
于 2017-02-18T20:59:16.503 回答
4

好的，我在这里为您构建功能：

 public void omriFunction(){
    Date Start = null;
    Date End = null;
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("HH:mm");
    try {
        Start = simpleDateFormat.parse(04+":"+30);
        End = simpleDateFormat.parse(06+":"+45);}
    catch(ParseException e){
        //Some thing if its not working
    }

    long difference = End.getTime() - Start.getTime();
    int days = (int) (difference / (1000*60*60*24));
    int hours = (int) ((difference - (1000*60*60*24*days)) / (1000*60*60));
    int min = (int) (difference - (1000*60*60*24*days) - (1000*60*60*hours)) / (1000*60);
    if(hours < 0){
        hours+=24;
    }if(min < 0){
        float  newone = (float)min/60 ;
        min +=60;
        hours =(int) (hours +newone);}
    String c = hours+":"+min;
    Log.d("ANSWER",c);}

答案：2:15；在日志中

于 2015-04-03T12:57:47.853 回答
2

流程大致如下，

  1. 通过以下方式将您的字符串实例转换为日期实例

    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
Date date = format.parse("2011-01-03");

  2. 假设您拥有的 systemTime 很长，表示自 epoc 以来的毫秒数，您现在可以执行以下操作

    long difference = longNow - date.getTime();
int msPerHour = 1000*60*60;
int hours = difference/secondPerHour;
int minutes = difference % secondPerHour;

    longNow您当前的变量在哪里包含系统时间。

于 2013-03-12T11:58:51.280 回答
1 
Date currentTime = parseDate("11:27:20 AM");
Date endTime = parseDate("10:30:01 AM");

if (endTime.before(currentTime))
{
    Log.e("Time :","===> is before from current time");
}

if (endTime.after(currentTime))
{
    Log.e("Time :","===> is after from current time");
}



private Date parseDate(String date)
{
    String inputFormat = "hh:mm:ss aa";
    SimpleDateFormat inputParser = new SimpleDateFormat(inputFormat, Locale.US);
    try {
        return inputParser.parse(date);
    } catch (java.text.ParseException e) {
        return new Date(0);
    }
}
于 2018-09-15T06:26:38.980 回答
0

嗨，伙计们不知道我做错了什么，但这对我有帮助，希望我能帮助别人。

我的最小值是以某种浮点格式计算的，所以我使用了这个公式

long Min = time %  (1000*60*60)/(60*1000);
time is my date2.getTime() - date1.getTime();

快乐编码

于 2015-06-05T10:24:26.487 回答
0

因此，我一直在寻找一种可以从 Kolin 的 2 Times 获得 HH/MM/SS 的方法，这似乎是一个不错的方法。

它使用import org.threeten.bp

fun getTimedifference(startTime: LocalDateTime,  endTime: LocalDateTime): String {
        val startTimeInstant = startTime.atOffset(ZoneOffset.UTC).toInstant()
        val endTimeInstant = endTime.atOffset(ZoneOffset.UTC).toInstant()
        val duration = Duration.between(startTimeInstant, endTimeInstant)
        val days = duration.toDays()
        val hours = duration.toHours() - (days * 24)
        val min = duration.toMinutes() - (duration.toHours() * 60)
        val sec = (duration.toMillis() / 1000) - (duration.toMinutes() * 60)
        return "${hours}:${min}:${sec}"
    }
于 2021-07-15T09:15:17.183 回答
0

托盘以下代码可在两次之间获得不同的小时和分钟：

private static int getHoursDiff(Calendar c1, Calendar c2) {
            Date d1 = c1.getTime();
            Date d2 = c2.getTime();
            long mils = d1.getTime() - d2.getTime();
            int hourDiff = (int) (mils / (1000 * 60 * 60));
            return hourDiff;
        }

        private static int getMinuteDiff(Calendar c1, Calendar c2) {
            Date d1 = c1.getTime();
            Date d2 = c2.getTime();
            long mils = d1.getTime() - d2.getTime();
            int minuteFor = (int) (mils / (1000 * 60) % 60);
            return minuteFor;
        } }
于 2019-03-10T09:53:03.980 回答