Пример #1
0
  /**
   * Internal helper method to aid in the subclass architecture. Overwrites the superclass method
   * and calls it internally.
   *
   * @param header
   * @param s
   */
  protected void sentenceChooser(String header, String s) {
    if (header.equals(RMCSentence.HEADER)) {
      rmcSentence.setSentence(s);
      notifyListeners(this.rmcSentence);
    } else if (header.equals(GSVSentence.HEADER)) {
      // TODO: I wonder what happens if say 2 of 4 are received and parse is called?
      // Because 2 would be new data, 2 would be old data.
      // Can't happen because parse() only called when not null.
      // BUT what if it is in the middle of parsing and new data comes in?
      // Solution: Sync GSVSentence.parse()? checkRefresh() is already synced though.

      // 0. Get StringTokenizer to read info from NMEASentence:
      StringTokenizer st = new StringTokenizer(s, ",");
      st.nextToken(); // Skip header $GPGSV
      // 1.1 Find out how many sentences in sequence.
      gsvSentenceTotal = Integer.parseInt(st.nextToken());
      // 1.2 Find out which sentence this is.
      gsvSentenceNumber = Integer.parseInt(st.nextToken());
      // 2. Assign sentence to GSVSentence in order.
      gsvSentence.setSentence(s, gsvSentenceNumber, gsvSentenceTotal);
      // 3. If last sentence:
      if (gsvSentenceTotal == gsvSentenceNumber) {
        // 3a. setSentence() to last one so it is not null
        gsvSentence.setSentence(s);
        // 3b. Notify GPSListener
        notifyListeners(this.gsvSentence);
      }
    } else super.sentenceChooser(header, s); // Check superclass sentences.
  }
Пример #2
0
 /**
  * Get NMEA Satellite. The satellite list is retrieved from the almanac data. Satellites are
  * ordered by their elevation: highest elevation (index 0) -> lowest elevation.
  *
  * @param index the satellite index
  * @return the NMEASaltellite object for the selected satellite
  */
 public Satellite getSatellite(int index) {
   Satellite s = gsvSentence.getSatellite(index);
   // Compare getPRN() with this satellite, fill in setTracked():
   // TODO: This fails because most satellites are set to 0 when this is called. Not synced yet.
   boolean tracked = false;
   int[] prns = getPRN();
   for (int i = 0; i < prns.length; i++) {
     if (prns[i] == s.getPRN()) tracked = true;
     break;
   }
   s.setTracked(tracked);
   return s;
 }
Пример #3
0
 /**
  * The satellites in view is a list of satellites the GPS could theoretically connect to (i.e.
  * satellites that are not over the earth's horizon). The getSatellitesInView() method will always
  * return an equal or greater number than getSatellitesTracked().
  *
  * @return Number of satellites e.g. 8
  */
 public int getSatellitesInView() {
   return gsvSentence.getSatellitesInView();
 }