android - 在 Android 上使用 "A minute ago"或 "An hour ago"等字符串获取时差

Question

我的 PHP 中有这段代码

function nicetime($date)
{
date_default_timezone_set("Asia/Taipei");
if(empty($date)) {
    return "No date provided";
}

$periods         = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
$lengths         = array("60","60","24","7","4.35","12","10");

$now             = time();
$unix_date         = strtotime($date);

   // check validity of date
if(empty($unix_date)) {    
    return "Bad date";
}

// is it future date or past date
if($now > $unix_date) {    
    $difference     = $now - $unix_date;
    $tense         = "ago";

} else {
    $difference     = $unix_date - $now;
    $tense         = "from now";
}

for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
    $difference /= $lengths[$j];
}

$difference = round($difference);

if($difference != 1) {
    $periods[$j].= "s";
}

return "$difference $periods[$j] {$tense}";
}

但现在我想做同样的事情，但这次是在我的 Android 上。我遇到了麻烦，因为字符串 mytime 来自数据库，采用 SQL 格式。

String mytime = pref.getString("announcementtime" + count, null);

mytime 的输出:

2013-08-31 15:55:22

我想把它转换成:

23 minutes ago //something like this

请注意默认时区和 DateTime = Now

Answer 1

全部在 DateUtils 中类(class)。

CharSequence getRelativeTimeSpanString (long time, long now, long minResolution);

以如下格式为您提供时间和现在之间的差异:

54 秒前。

要使用日期字符串，您必须先将其转换为纪元时间:

String mytime = pref.getString("announcementtime" + count, null); 

// it comes out like this 2013-08-31 15:55:22 so adjust the date format
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = df.parse(str);
long epoch = date.getTime();

String timePassedString = getRelativeTimeSpanString (epoch, System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);