通过Google I / O 2012应用程序：
private static final int SECOND_MILLIS = 1000;private static final int MINUTE_MILLIS = 60 * SECOND_MILLIS;private static final int HOUR_MILLIS = 60 * MINUTE_MILLIS;private static final int DAY_MILLIS = 24 * HOUR_MILLIS;public static String getTimeAgo(long time, Context ctx) { if (time < 1000000000000L) { // if timestamp given in seconds, convert to millis time *= 1000; } long now = getCurrentTime(ctx); if (time > now || time <= 0) { return null; } // TODO: localize final long diff = now - time; if (diff < MINUTE_MILLIS) { return "just now"; } else if (diff < 2 * MINUTE_MILLIS) { return "a minute ago"; } else if (diff < 50 * MINUTE_MILLIS) { return diff / MINUTE_MILLIS + " minutes ago"; } else if (diff < 90 * MINUTE_MILLIS) { return "an hour ago"; } else if (diff < 24 * HOUR_MILLIS) { return diff / HOUR_MILLIS + " hours ago"; } else if (diff < 48 * HOUR_MILLIS) { return "yesterday"; } else { return diff / DAY_MILLIS + " days ago"; }}
