android 将时间戳转为代表"距现在多久之前"的字符串

/**
* 将时间戳转为代表"距现在多久之前"的字符串
* @param timeStr	时间戳
* @return
*/
public static String getStandardDate(String timeStr) {

StringBuffer sb = new StringBuffer();

long t = Long.parseLong(timeStr);
long time = System.currentTimeMillis() - (t*1000);
long mill = (long) Math.ceil(time /1000);//秒前

long minute = (long) Math.ceil(time/60/1000.0f);// 分钟前

long hour = (long) Math.ceil(time/60/60/1000.0f);// 小时

long day = (long) Math.ceil(time/24/60/60/1000.0f);// 天前

if (day - 1 > 0) {
sb.append(day + "天");
} else if (hour - 1 > 0) {
if (hour >= 24) {
sb.append("1天");
} else {
sb.append(hour + "小时");
}
} else if (minute - 1 > 0) {
if (minute == 60) {
sb.append("1小时");
} else {
sb.append(minute + "分钟");
}
} else if (mill - 1 > 0) {
if (mill == 60) {
sb.append("1分钟");
} else {
sb.append(mill + "秒");
}
} else {
sb.append("刚刚");
}
if (!sb.toString().equals("刚刚")) {
sb.append("前");
}
return sb.toString();
}