Question

我是android的新手，我有使用Time对象需要使用的代码。有人可以在不使用Time类的情况下帮助我实现相同的功能。

Time dayTime = new Time();
dayTime.setToNow();

// we start at the day returned by local time. Otherwise this is a mess.
int julianStartDay = Time.getJulianDay(System.currentTimeMillis(), dayTime.gmtoff);

// now we work exclusively in UTC
dayTime = new Time();
long dateTime;

// Cheating to convert this to UTC time, which is what we want anyhow
// this code below is in a for loop
dateTime = dayTime.setJulianDay(julianStartDay + i);
day = getReadableDateString(dateTime);

Answer 1

使用具有HH：mm：ss格式的SimpleDateFormat函数来实现此功能。

SimpleDateFormat serverFormat = new SimpleDateFormat("HH:mm:ss",Locale.getDefault());
serverFormat.format(Calendar.getInstance());

Answer 2

根据Android Documentation，API级别22中不推荐使用时间类。改为使用GregorianCalendar类。

GregorianCalendar gc = new GregorianCalendar();

//since you have asked for the function to achieve in loop
for(int i= 0; i<Array.length;i++){
        gc.add(GregorianCalendar.DATE, 1);
}
 //code for formatting the date   
Date time = gc.getTime();
SimpleDateFormat shortDateFormat = new SimpleDateFormat("EEE MMM dd");
day = shortenedDateFormat.format(time);

Answer 3

正如@Vamisi所说，我们可以使用GregorianCalendar，但他的代码似乎有问题。

如果我们每次在循环::

中调用以下内容

gc.add(GregorialCalendar.Date,i);

GregorialCalendar的实例是GC。每次如果我们按i添加日期，首先它将是1 + 1 next，2 + 2,4 + 3 ......等等

所以正确的方法是：

//since you have asked for the function to achieve in loop
for(int i= 0; i<Array.length;i++){
        GregorianCalendar gc = new GregorianCalendar();
        gc.add(GregorianCalendar.DATE, i);
}
//code for formatting the date   
Date time = gc.getTime();
SimpleDateFormat shortDateFormat = new SimpleDateFormat("EEE MMM dd");
day = shortDateFormat.format(time);

参考：http://developer.android.com/reference/java/util/GregorianCalendar.html http://www.tutorialspoint.com/java/util/gregoriancalendar_add.htm

Answer 4

我猜这是开发Android应用程序的Udacity课程的一部分，论坛中也没有关于时间类弃用的更正。

替换它是公历日历类。您可以参考Android开发人员博客上更新的文档：http://developer.android.com/reference/android/text/format/Time.html

至于使用格里高利历的代码更改，以便它以相同的方式工作（即使用循环迭代几天），这是你可以做的：

        JSONObject forecastJson = new JSONObject(forecastJsonStr);
        JSONArray weatherArray = forecastJson.getJSONArray(OWM_LIST);

        //Using the Gregorian Calendar Class instead of Time Class to get current date
        Calendar gc = new GregorianCalendar();

        String[] resultStrs = new String[numDays];

        for(int i = 0; i < weatherArray.length(); i++) {
            // For now, using the format "Day, description, hi/low" for the app display
            String day;
            String description;
            String highAndLow;

            // Get the JSON object representing the day
            JSONObject dayForecast = weatherArray.getJSONObject(i);

            //Converting the integer value returned by Calendar.DAY_OF_WEEK to
            //a human-readable String
            day = gc.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.ENGLISH);

            //iterating to the next day
            gc.add(Calendar.DAY_OF_WEEK, 1);

            // description is in a child array called "weather", which is 1 element long.
            JSONObject weatherObject = dayForecast.getJSONArray(OWM_WEATHER).getJSONObject(0);
            description = weatherObject.getString(OWM_DESCRIPTION);

            // Temperatures are in a child object called "temp".
            JSONObject temperatureObject = dayForecast.getJSONObject(OWM_TEMPERATURE);
            double high = temperatureObject.getDouble(OWM_MAX);
            double low = temperatureObject.getDouble(OWM_MIN);

            highAndLow = formatHighLows(high, low);
            resultStrs[i] = day + " - " + description + " - " + highAndLow;
        }

注意：对象gc设置为创建时的当前时间[Calendar gc = new GregorianCalendar();]，您可以简单地运行gc.get(Calendar.DAY_OF_WEEK)以获得与星期几相对应的整数。例如：7对应于星期六，1对应星期日，2对应星期一，依此类推。

android.text.format.Time替换需要，因为它已被弃用

4 个答案: