gistfile1.txt

NJSONObject records = json.optNJSONObject("Records");
//Check if null
NJSONObject record = records.getNJSONObject("Record");
//Check if null
NJSONObject tracking = record.optNJSONObject("Tracking");
//Check if null
String gpsPosition = tracking.optString("GPSPosition",null);
	if(gpsPosition != null){
		String[] gpsPositionArray = gpsPosition.split(",");
		double lat = Double.parseDouble(gpsPositionArray[0]);
		double lng = Double.parseDouble(gpsPositionArray[1]);
		//Save a latlng object on user
	}