Decode GPS navigation message - onNavMessageReported() (from https://github.com/google/gps-measurement-tools/blob/063e2275e29de1f5476f2a9a9e0cb900a37d0b68/GNSSLogger/pseudorange/src/main/java/com/google/location/lbs/gnss/gps/pseudorange/GpsNavigationMessageStore.java#L198)

onNavMessageReported.java

  /**
   * Handles a fresh Navigation Message. The message is in its raw format.
   */
  public void onNavMessageReported(byte prn, byte type, short id, byte[] rawData) {
    Preconditions.checkArgument(type == 1, "Unsupported NavigationMessage Type: " + type);
    Preconditions.checkArgument(
        rawData != null && rawData.length == L1_CA_MESSAGE_LENGTH_BYTES,
        "Invalid length of rawData for L1 C/A");
    synchronized (fullyDecodedIntermediateEphemerides) {
      switch (id) {
        case 1:
          handleFirstSubframe(prn, rawData);
          break;
        case 2:
          handleSecondSubframe(prn, rawData);
          break;
        case 3:
          handleThirdSubframe(prn, rawData);
          break;
        case 4:
          handleFourthSubframe(rawData);
          break;
        case 5:
          break;
        default:
          // invalid message id
          throw new IllegalArgumentException("Invalid Subframe ID: " + id);
      }
    }
  }