CODEWITHSUNDEEP
javaandroidnetwork-programmingclientntp
Marcus
Marcus

Reputation: 33

Get time of NTP-Server from Android App

Dear android developers,

I'm trying to implement the sntpclient class in my application but it didn't work.

Class: http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/4.0.3_r1/android/net/SntpClient.java

in my code I have the following lines:

public void onClickBtn(View v)
{
    SntpClient client = new SntpClient();
     if (client.requestTime("pool.ntp.org", 10)) {
         long now = client.getNtpTime() + SystemClock.elapsedRealtime() - client.getNtpTimeReference();
         Toast.makeText(this, "Offset: " + now, Toast.LENGTH_LONG).show();
     }
}

I really don't know what the meaning of network timeout is in this case.

It would be great, when someone has any idea or tip for me.

Thanks in advance!

Upvotes: 3

Views: 10741

Answers (3)

Henadzi Rabkin
Henadzi Rabkin

Reputation: 7033

Check that your manifest has this one:

<uses-permission android:name="android.permission.INTERNET" />

Upvotes: 1

user4790312
user4790312

Reputation:

You can use this Full sample:

class getCurrentNetworkTime extends AsyncTask<String, Void, Boolean> {

    private Exception exception;

    protected Boolean doInBackground(String... urls) {
        NTPUDPClient timeClient = new NTPUDPClient();
        timeClient.setDefaultTimeout(3000);
        InetAddress inetAddress = null;
        boolean is_locale_date = false;
        try {
            inetAddress = InetAddress.getByName(G.TIME_SERVER);
            TimeInfo timeInfo = null;
            timeInfo = timeClient.getTime(inetAddress);
            long localTime = timeInfo.getReturnTime();
            long serverTime = timeInfo.getMessage().getTransmitTimeStamp().getTime();
            if (new Date(localTime) != new Date(serverTime))
                is_locale_date = true;

        } catch (UnknownHostException e) {
            e.printStackTrace();
            Log.e("UnknownHostException: ", e.getMessage());
        } catch (IOException e) {
            e.printStackTrace();
            Log.e("IOException: ", e.getMessage());
        }
        return is_locale_date;
    }

    protected void onPostExecute(boolean local_date) {
        if(!local_date) {
            Log.e("Check ", "dates not equal" + local_date);
        }
    }
}

How to use:

new getCurrentNetworkTime().execute();

Upvotes: 3

user3011455
user3011455

Reputation: 41

You should put it in AsyncTask like this :

class GetNTPAsynctask extends AsyncTask<String, Void, Boolean> {

@Override
        protected Boolean doInBackground(String... params) {
            private SntpClient sntpClient = new SntpClient();
            return sntpClient.requestTime("pool.ntp.org", 30000);
        }
}

Timeout: network timeout in milliseconds. So i use 30000 mean 30 seconds.

Upvotes: 4

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