两个给定日期之间的进度条- Android Studio
两个给定日期之间的进度条- Android Studio
提问于 2021-04-14 18:53:51
我想要一个进度条来显示给定日期之间的剩余时间。我已经在我的应用程序上设置了一个计时器，它每秒刷新一次，并给出两个给定日期之间的时间差。
以下是计算日期之间时间的代码：
public String printDifference(Date startDate, Date endDate) {
//milliseconds
long different = endDate.getTime() - startDate.getTime();
System.out.println("startDate : " + startDate);
System.out.println("endDate : "+ endDate);
System.out.println("different : " + different);
long secondsInMilli = 1000;
long minutesInMilli = secondsInMilli * 60;
long hoursInMilli = minutesInMilli * 60;
long daysInMilli = hoursInMilli * 24;
long elapsedDays = different / daysInMilli;
different = different % daysInMilli;
long elapsedHours = different / hoursInMilli;
String hour = String.valueOf(elapsedHours);
different = different % hoursInMilli;
long elapsedMinutes = different / minutesInMilli;
String mins = String.valueOf(elapsedMinutes);
different = different % minutesInMilli;
long elapsedSeconds = different / secondsInMilli;
String sec = String.valueOf(elapsedSeconds);
if(Integer.parseInt(hour)<10){
hour = "0"+hour;
}
if(Integer.parseInt(mins)<10){
mins = "0"+mins;
}
if(Integer.parseInt(sec)<10){
sec = "0"+sec;
}
return hour + ":" + mins + ":" + sec;
}这是更新显示的代码，使其看起来像是倒计时：
private void updateDisplay() {
Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
Date curr = Calendar.getInstance().getTime();
Calendar tmr = Calendar.getInstance();
tmr.add(Calendar.DAY_OF_MONTH, 1);
Date tmrTime = tmr.getTime();
SimpleDateFormat df = new SimpleDateFormat("dd.MM.yyyy, hh:mm:ss aa", Locale.getDefault());
SimpleDateFormat df2 = new SimpleDateFormat("dd.MM.yyyy", Locale.getDefault());
String currentDate = df.format(curr);
String shewanDate = df2.format(curr)+", "+shewan+":00 pm";
String bayaniDate = df2.format(curr)+", "+bayani+":00 am";
String bayaniDateTmr = df2.format(tmrTime)+", "+bayani+":00 am";
Date currentD = new Date(), shewanD = new Date(), bayaniD = new Date(), bayaniTmrD = new Date();
try {
currentD = df.parse(currentDate);
shewanD = df.parse(shewanDate);
bayaniD = df.parse(bayaniDate);
bayaniTmrD = df.parse(bayaniDateTmr);
} catch (ParseException e) {
e.printStackTrace();
}
try {
currentD = df.parse(currentDate);
bayaniTmrD = df.parse(bayaniDateTmr);
time.setText(printDifference(currentD, bayaniTmrD));
} catch (ParseException e) {
e.printStackTrace();
}
},0,1000);//Update text every second
}如何制作一个水平进度条来显示给定的两个日期之间的剩余时间。提前谢谢。
编辑:这是我使用以下代码得到的结果：
回答 2
Stack Overflow用户
回答已采纳
发布于 2021-04-14 20:07:43
给定两个日期，您可以将它们之间的差值计算为长值：
long startDate = .... ;
long endDate = ..... //calendar.getTimeInMillis();
long diffDate = endDate - startDate;然后获取currentDate always as long值：
long currentDate = ... ;
long currentDiff = currentDate - startDate;最后，计算应用于ProgressBar的进度：
float progress = (float)currentDiff/diffDate*100;并更新您的ProgressBar：
LinearProgressIndicator linearProgressIndicator = findViewById(R.id.progress);
linearProgressIndicator.setProgress((int)progress);通过以下方式：
<com.google.android.material.progressindicator.LinearProgressIndicator
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/progress"
android:indeterminate="false"/>
Stack Overflow用户
发布于 2021-04-14 19:08:25
这样做。计算日期之间的差异，并将其div为100(进度条0..100)以获得进度条步长。
int progress = 100;
long diff = endDateValue.getTime() - startDateValue.getTime();
val step = dif/100;
val currentStateDiff = endDateValue.getTime() - new Date().getTime();
if(currentStateDiff <= 0) progress = 0 else progress = currentStateDiff / step页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/67090316
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