从互联网或谷歌(Android studio)获取日期和时间

Question

我正在开发一个应用程序，其中用户将注册产品，我需要的日期和时间，当他在UTC+5注册的产品从谷歌或互联网。我真的对此一无所知。格式-周一03.12.2016 23:54。还有，有没有办法改变语言，让星期六用俄语写？

Answer 1

有一个用于获取真实设备时间的a library called TrueTime。Wiki示例(使用Rx)：

TrueTimeRx.build()
        .initializeRx("time.google.com")
        .subscribeOn(Schedulers.io())
        .subscribe(date -> {
            Log.v(TAG, "TrueTime was initialized and we have a time: " + date);
        }, throwable -> {
            throwable.printStackTrace();
        });

Answer 2

使用HttpGet、客户机和响应，我设法从Response Date头中获取服务器的当前时间。我可以随时调用它，并将获得自信的响应(Google几乎100%可用，我可以信任获得正确的日期和时间)

try{
        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse response = httpclient.execute(new HttpGet("https://google.com/"));
        StatusLine statusLine = response.getStatusLine();
        if(statusLine.getStatusCode() == HttpStatus.SC_OK){
            String dateStr = response.getFirstHeader("Date").getValue();
            //Here I do something with the Date String
            System.out.println(dateStr);

        } else{
            //Closes the connection.
            response.getEntity().getContent().close();
            throw new IOException(statusLine.getReasonPhrase());
        }
    }catch (ClientProtocolException e) {
        Log.d("Response", e.getMessage());
    }catch (IOException e) {
        Log.d("Response", e.getMessage());
    }

检查此项目：Click Here

Answer 3

使用下面的代码

static final String DATEFORMAT = "yyyy-MM-dd HH:mm:ss"

public static Date GetUTCdatetimeAsDate()
{
    //note: doesn't check for null
    return StringDateToDate(GetUTCdatetimeAsString());
}

public static String GetUTCdatetimeAsString()
{
    final SimpleDateFormat sdf = new SimpleDateFormat(DATEFORMAT);
    sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
    final String utcTime = sdf.format(new Date());

    return utcTime;
}

public static Date StringDateToDate(String StrDate)
{
    Date dateToReturn = null;
    SimpleDateFormat dateFormat = new SimpleDateFormat(DATEFORMAT);

    try
    {
        dateToReturn = (Date)dateFormat.parse(StrDate);
    }
    catch (ParseException e)
    {
        e.printStackTrace();
    }

    return dateToReturn;
}