我有一个显示2日期之间的差异，但我想是显示我想这code，但它不显示任何内容。在倒计时时间差一个Android的活动

谁能帮我解决这个问题???

firstActivity.java

 包com.devleb.expandablelistdemo3;

进口java.io.IOException异常;
进口java.text.ParseException;
进口java.text.SimpleDateFormat的;
进口java.util.Date;

进口android.app.Activity;
进口android.content.Intent;
进口android.os.Bundle;
进口android.os.Handler;
进口android.util.Log;
进口android.view.Menu;
进口android.view.View;
进口android.widget.TextView;
进口android.widget.Toast;

公共类FirstActivity延伸活动{

    长diffSeconds;
    长diffMinutes;
    长diffHours;
    长diffDays;


    私人处理程序处理程序;
    私人布尔运行=真;

    日D1;
    日期D2 = NULL;
    SimpleDateFormat的格式;

    字符串2037 =二〇一四年六月一十二日23:00:00;

    //私人DatabaseHelper dbHelper = NULL;

    @覆盖
    保护无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_first）;
        getDiffDate（）;


    }

    公共无效listTeams（视图v）{
        意图=新的意图（getBaseContext（），MainActivity.class）;
        startActivity（在）;
    }

    公共无效listGroups（视图v）{
        意图=新的意图（getBaseContext（），GroupList.class）;
        startActivity（在）;
    }

    公共无效DisplaySched（视图v）{

        意图=新的意图（getBaseContext（），MatchScheduleList.class）;
        startActivity（在）;
    }

    @覆盖
    公共布尔onCreateOptionsMenu（功能菜单）{
        //充气菜单;这增加了项目操作栏，如果它是present。
        。getMenuInflater（）膨胀（R.menu.first，菜单）;
        返回true;
    }

    公共无效getDiffDate（）{



        // HH 24小时格式（0-23），天计算转换小时
        格式=新的SimpleDateFormat（MM / DD / YYYY HH：MM：SS）;

        D1 =新的日期（）;

        D2 =无效;

        处理程序=新的处理程序（）;




        可运行可运行=新的Runnable（）{


            @覆盖
            公共无效的run（）{
                // TODO自动生成方法存根
            而（运行）{
                尝试{

                    D2 = format.parse（2037）;

                    //以毫秒为单位
                    长差异= d2.getTime（） -  d1.getTime（）;

                     diffSeconds =差异/ 1000％60;
                     diffMinutes =差异/（60 * 1000）％60;
                     diffHours =差异/（60 * 60 * 1000）％24;
                     diffDays =差异/（24 * 60 * 60 * 1000）;

                    System.out.print（diffDays +天）;
                    System.out.print（diffHours +小时）;
                    System.out.print（diffMinutes +分钟）;
                    System.out.print（diffSeconds +秒。）;


                    视频下载（1000）; //1秒
                }赶上（InterruptedException异常E）{
                    e.printStackTrace（）;
                }
                赶上（例外五）{
                    e.printStackTrace（）;
                }
                handler.post（新的Runnable（）{

                    @覆盖
                    公共无效的run（）{
                        // TODO自动生成方法存根
                        diffSeconds  -  = 1;

                        TextView的txtDate =（TextView中）findViewById（R.id.txtDifDate）;
                        字符串resultDate = diffDays +天+ diffHours +小时
                                + diffMinutes +最小+ diffSeconds +S;
                        txtDate.setText（resultDate）;
                    }
                }）;
            }
          }
        };



    }
}
 

解决方案

有很多方法，主要是要采取通知，如果您有更新UI，你必须UI线程上运行，如果我们使用 CountDownTimer ，这是后做这个

 公共类DateCountDownTimer扩展CountDownTimer
{

        公共DateCountDownTimer（长的startTime，长间隔）
        {
            超（startTime时，间隔）;
        }

        @覆盖
        公共无效onFinish（）
        {
            txvDate.setText（0分钟0秒）;
            this.cancel（）;
        }

        @覆盖
        公共无效onTick（长millisUntilFinished）
        {
                 diffSeconds = millisUntilFinished / 1000％60;
                 diffMinutes = millisUntilFinished /（60 * 1000）％60;
                 diffHours = millisUntilFinished /（60 * 60 * 1000）％24;
                 diffDays = millisUntilFinished /（24 * 60 * 60 * 1000）;
                 字符串resultDate = diffDays +天+ diffHours +小时
                            + diffMinutes +最小+ diffSeconds +S;
                 txtDate.setText（resultDate）;
        }
    }
 

要启动计时器，使用

 长差异= d2.getTime（） -  d1.getTime（）;
     长间隔= 1000;
     DateCountDownTimer定时器=新DateCountDownTimer（差异，间隔）;
     timer.start（）; //启动定时器
 

有各种其他的方式的AsyncTask 。

请不要接受答案，如果有帮助！

i have an android activity that display the difference between 2 dates but what i want is to display the difference in count down time i tried this code but it do not display anything.

can anyone help me to fix this problem ???

firstActivity.java

package com.devleb.expandablelistdemo3;

import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

public class FirstActivity extends Activity {

    long diffSeconds;
    long diffMinutes;
    long diffHours;
    long diffDays;


    private Handler handler;
    private boolean Running = true;

    Date d1; 
    Date d2 = null;
    SimpleDateFormat format;

    String dateStop = "06/12/2014 23:00:00";

    // private DatabaseHelper dbHelper = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_first);
        getDiffDate();


    }

    public void listTeams(View v) {
        Intent in = new Intent(getBaseContext(), MainActivity.class);
        startActivity(in);
    }

    public void listGroups(View v) {
        Intent in = new Intent(getBaseContext(), GroupList.class);
        startActivity(in);
    }

    public void DisplaySched(View v) {

        Intent in = new Intent(getBaseContext(), MatchScheduleList.class);
        startActivity(in);
    }

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

    public void getDiffDate() {



        // HH converts hour in 24 hours format (0-23), day calculation
        format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");

        d1 = new Date();

        d2 = null;

        handler = new Handler();




        Runnable runnable = new Runnable() {


            @Override
            public void run() {
                // TODO Auto-generated method stub
            while(Running){
                try{

                    d2 = format.parse(dateStop);

                    // in milliseconds
                    long diff = d2.getTime() - d1.getTime();

                     diffSeconds = diff / 1000 % 60;
                     diffMinutes = diff / (60 * 1000) % 60;
                     diffHours = diff / (60 * 60 * 1000) % 24;
                     diffDays = diff / (24 * 60 * 60 * 1000);

                    System.out.print(diffDays + " days, ");
                    System.out.print(diffHours + " hours, ");
                    System.out.print(diffMinutes + " minutes, ");
                    System.out.print(diffSeconds + " seconds.");


                    Thread.sleep(1000);//1 second
                }catch(InterruptedException e){
                    e.printStackTrace();
                }
                catch (Exception e) {
                    e.printStackTrace();
                }
                handler.post(new Runnable() {

                    @Override
                    public void run() {
                        // TODO Auto-generated method stub
                        diffSeconds -= 1;

                        TextView txtDate = (TextView) findViewById(R.id.txtDifDate);
                        String resultDate = diffDays + "days " + diffHours + "Hours "
                                + diffMinutes + "Min " + diffSeconds + "S";
                        txtDate.setText(resultDate);
                    }
                });
            }
          }
        };



    }
}

There are many ways, main thing to take notice is if you have to update the ui, you have to run on ui thread, if we do using CountDownTimer, this is way doing this

public class DateCountDownTimer extends CountDownTimer 
{

        public DateCountDownTimer(long startTime, long interval) 
        {
            super(startTime, interval);             
        }

        @Override
        public void onFinish() 
        {
            txvDate.setText("0 min 0 sec");
            this.cancel();
        }

        @Override
        public void onTick(long millisUntilFinished) 
        {
                 diffSeconds = millisUntilFinished / 1000 % 60;
                 diffMinutes = millisUntilFinished / (60 * 1000) % 60;
                 diffHours = millisUntilFinished / (60 * 60 * 1000) % 24;
                 diffDays = millisUntilFinished / (24 * 60 * 60 * 1000);
                 String resultDate = diffDays + "days " + diffHours + "Hours "
                            + diffMinutes + "Min " + diffSeconds + "S";
                 txtDate.setText(resultDate);
        }
    }

To start the timer, use this

     long diff = d2.getTime() - d1.getTime();
     long interval=1000;
     DateCountDownTimer timer=new DateCountDownTimer(diff,interval);
     timer.start();//start the timer

There are various other ways AsyncTask.

Please Do Accept Answer, If it helps!