更新时间每一秒 [英] Update time every second
本文介绍了更新时间每一秒的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要更新每一秒时间上倒计时到圣诞节倒计时。
我如何更新我的文字view.I时间没有在onCreate方法的code。
下面是我的一些code的。当我运行code那么它会给出确切的时间，但它并没有在屏幕上直播倒计时。有任何想法吗？
编辑：该readThisPeriod是计算留到圣诞节的时候
公共无效DateCalculator（）{
今天的日历= Calendar.getInstance（）;
日历thatDay = Calendar.getInstance（）;
thatDay.set（Calendar.DAY_OF_MONTH，25）;
thatDay.set（的Calendar.MONTH，11）; // 0-11所以少1
thatDay.set（Calendar.YEAR，2014年）;
thatDay.set（Calendar.HOUR，0）;
thatDay.set（Calendar.MINUTE，0）;
thatDay.set（Calendar.SECOND，0）;
thatDay.set（Calendar.AM_PM，0）;
的System.out.println（thatDay.getTime（））;
ScheduledExecutorService的ScheduledExecutorService的= Executors.newScheduledThreadPool（1）;
scheduledExecutorService.scheduleAtFixedRate（新ReadThisPeriod（thatDay），0，1，
TimeUnit.SECONDS）; 长差异=（thatDay.getTimeInMillis（） - today.getTimeInMillis（））/ 1000;
长天=差异/（60 * 60 * 24）;
时间长=差异/（60 * 60）％24;
长期分钟=差异/ 60％60;
长秒=差异％60; daysBox =（的TextView）findViewById（R.id.s1Days）;
daysBox.setText（++日++时间++分++秒+）;
}
解决方案
进口android.app.Activity;
进口android.os.AsyncTask;
进口android.support.v7.app.ActionBarActivity;
进口android.os.Bundle;
进口android.view.Menu;
进口android.view.MenuItem;
进口android.widget.TextView;进口的java.util.Calendar;
公共类MainActivity延伸活动{ 私人TextView的daysBox;
私人布尔运行;
私人日历thatDay; @覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.activity_main）;
daysBox =（的TextView）findViewById（R.id.main_day）; thatDay = Calendar.getInstance（）;
thatDay.set（Calendar.DAY_OF_MONTH，25）;
thatDay.set（的Calendar.MONTH，11）; // 0-11所以少1
thatDay.set（Calendar.YEAR，2014年）;
thatDay.set（Calendar.HOUR，0）;
thatDay.set（Calendar.MINUTE，0）;
thatDay.set（Calendar.SECOND，0）;
thatDay.set（Calendar.AM_PM，0）; startDateCalculator（）;
} 保护无效的onPause（）{
super.onPause（）;
运行= FALSE;
} 保护无效onResume（）{
super.onResume（）;
运行= TRUE;
}
私有类CountdownTask扩展的AsyncTask＆LT;太虚，太虚，太虚＆GT; {
保护无效doInBackground（无效参数... args）{
而（运行）{
尝试{
视频下载（1000）;
}赶上（例外五）{ } publishProgress（）;
}
返回null;
} 保护无效onProgressUpdate（虚空...... RES）{
super.onProgressUpdate（RES）; 长差异=（thatDay.getTimeInMillis（） - System.currentTimeMillis的（））/ 1000;
长天=差异/（60 * 60 * 24）;
时间长=差异/（60 * 60）％24;
长期分钟=差异/ 60％60;
长秒=差异％60;
daysBox.setText（++天+D+小时+：+分钟+：+秒+）;
}
} 公共无效startDateCalculator（）{ 新CountdownTask（）executeOnExecutor（AsyncTask.THREAD_POOL_EXECUTOR）;
}
}
I need to update time every second on a countdown timer which counts down to Christmas. How do I update the time in my text view.I do not have the code in the onCreate method.
here is some of my code. When I run the code it gives the exact time, but it does not countdown live on screen. Any ideas? Edit: the readThisPeriod is for calculating the time left until Christmas.
public void DateCalculator() {
Calendar today = Calendar.getInstance();
Calendar thatDay = Calendar.getInstance();
thatDay.set(Calendar.DAY_OF_MONTH, 25);
thatDay.set(Calendar.MONTH, 11); // 0-11 so 1 less
thatDay.set(Calendar.YEAR, 2014);
thatDay.set(Calendar.HOUR, 0);
thatDay.set(Calendar.MINUTE, 0);
thatDay.set(Calendar.SECOND, 0);
thatDay.set(Calendar.AM_PM, 0);
System.out.println(thatDay.getTime());
ScheduledExecutorService scheduledExecutorService =
Executors.newScheduledThreadPool(1);
scheduledExecutorService.scheduleAtFixedRate(new ReadThisPeriod(thatDay), 0, 1,
TimeUnit.SECONDS);
long diff = (thatDay.getTimeInMillis() - today.getTimeInMillis()) / 1000;
long days = diff / (60 * 60 * 24);
long hours = diff / (60 * 60) % 24;
long minutes = diff / 60 % 60;
long seconds = diff % 60;
daysBox = (TextView) findViewById(R.id.s1Days);
daysBox.setText("" + "" + days + "" + hours + "" + minutes + "" + seconds + " );
}
解决方案
import android.app.Activity;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import java.util.Calendar;
public class MainActivity extends Activity {
private TextView daysBox;
private boolean running;
private Calendar thatDay;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
daysBox = (TextView) findViewById(R.id.main_day);
thatDay = Calendar.getInstance();
thatDay.set(Calendar.DAY_OF_MONTH, 25);
thatDay.set(Calendar.MONTH, 11); // 0-11 so 1 less
thatDay.set(Calendar.YEAR, 2014);
thatDay.set(Calendar.HOUR, 0);
thatDay.set(Calendar.MINUTE, 0);
thatDay.set(Calendar.SECOND, 0);
thatDay.set(Calendar.AM_PM, 0);
startDateCalculator();
}
protected void onPause() {
super.onPause();
running = false;
}
protected void onResume() {
super.onResume();
running = true;
}
private class CountdownTask extends AsyncTask<Void, Void, Void> {
protected Void doInBackground(Void... args) {
while (running) {
try {
Thread.sleep(1000);
} catch (Exception e) {
}
publishProgress();
}
return null;
}
protected void onProgressUpdate(Void... res) {
super.onProgressUpdate(res);
long diff = (thatDay.getTimeInMillis() - System.currentTimeMillis()) / 1000;
long days = diff / (60 * 60 * 24);
long hours = diff / (60 * 60) % 24;
long minutes = diff / 60 % 60;
long seconds = diff % 60;
daysBox.setText("" + "" + days + "d " + hours + ":" + minutes + ":" + seconds + " ");
}
}
public void startDateCalculator() {
new CountdownTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}
}
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