GPS gives wrong date and time in Android

Question

I am fetching current date and time from GPS but it gives me date 3 days before the current date. In MyLocationListener class loc.getTime(); gives me date 3 days before the current date .Code which I am using

public class Location_gps extends Activity
{
 Button btn;
 LocationManager mlocManager;
 LocationListener mlocListener;
 Location loc;
 SimpleDateFormat sdf;
 Date d;

@Override
public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_location_gps);

  btn = (Button)findViewById(R.id.btn);

  /* Use the LocationManager class to obtain GPS locations */
  mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);

  mlocListener = new MyLocationListener();
  mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);

  loc = mlocManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

  sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ssZ");
 d = new Date(loc.getTime());


  btn.setOnClickListener(new OnClickListener()
  {
  @Override
  public void onClick(View v)
  {
   String Text = "My current location is: " +
        "\nLatitude = " + loc.getLatitude() +
        "\nLongitude = " + loc.getLongitude() +
        "\nAccuracy = " + loc.getAccuracy() +
        "\nAltitude = " + loc.getAltitude() +
        "\nProvider = " + loc.getProvider() +
        "\nTime = " + sdf.format(d); 

Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
  }
 });

}

public class MyLocationListener implements LocationListener
{

  @Override
  public void onLocationChanged(Location loc)
  {

    loc.getLatitude();
    loc.getLongitude();

    String Text = "My current location is: " +
    "\nLatitude = " + loc.getLatitude() +
    "\nLongitude = " + loc.getLongitude() +
    "\nAccuracy = " + loc.getAccuracy() +
    "\nAltitude = " + loc.getAltitude() +
    "\nTime = " + loc.getTime();

    Toast.makeText( getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
  }

  @Override
  public void onProviderDisabled(String provider)
  {
    Toast.makeText( getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT ).show();
  }

  @Override
  public void onProviderEnabled(String provider)
  {
    Toast.makeText( getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
  }

  @Override
  public void onStatusChanged(String provider, int status, Bundle extras)
  {

  }
}
}

How I fetch current date and time from GPS. Please help me.

score 2 · Accepted Answer · answered Feb 05 '13 at 08:00

As you use "getLastKnownLocation" method, it returns you the last parameters since it received a location update.

loc = mlocManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

If your device did not recently receive an update, it will return the last update which is 3 days past for your case. If it cannot receive gps update, check if your "gps" enabled or try it in open air.

score 0 · Answer 2 · answered Feb 05 '13 at 07:29

0

This seems to be an Android Bug...Please have a look at the following:

http://www.zdnet.com/blog/hardware/the-time-displayed-on-most-android-phones-is-wrong/19387

answered Feb 05 '13 at 07:29

Usama Sarwar

8,922
7
54
80

No then it would only be 15 seconds, no need to follow the linke above – FrankKrumnow Mar 27 '17 at 13:59

score -1 · Answer 3 · edited May 23 '17 at 12:25

-1

You should be using NTP api's instead of GPS. Check out http://code.google.com/p/ntp-sync/ and "Is Android using NTP to sync time?". Basically search for NTP on Android. NTP is the network time protocol standard across all devices, servers and networks.

edited May 23 '17 at 12:25

Community

1
1

answered Feb 05 '13 at 07:34

Siddharth

9,349
16
86
148

GPS gives wrong date and time in Android

3 Answers3