android - 如何在 Android 上创建本地化的时间前字符串

Question

我正在查看 Google I/O Session 2012 app并遇到了这个 TODO

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";
    }
}

这让我想知道将其本地化的步骤是什么。

Answer 1

如果不需要自定义字符串，也可以使用DateUtils.getRelativeTimeSpanString ，它会产生如下字符串:

• 42 分钟前
• 10 秒前
• 1 小时内

示例用法:

final CharSequence relativeTimeSpan = DateUtils.getRelativeTimeSpanString(time, now, 0);