Java GpsSatellite.getPrn方法代碼示例

import android.location.GpsSatellite; //導入方法依賴的package包/類
public static String convertNmeaGSA(List<GpsSatellite> satellites) {
    StringBuilder localStringBuilder = new StringBuilder();
    localStringBuilder.append("$GPGSA,,,");

    int satelliteChannelCount = 12;
    for (GpsSatellite s : satellites) {
        if ((s.getPrn() > 0) && s.usedInFix()) {
            localStringBuilder.append(String.format(Locale.getDefault(), "%02d,", s.getPrn()));
            satelliteChannelCount--;
        }
        if (satelliteChannelCount == 0) {
            break;
        }
    }
    while (satelliteChannelCount-- > 0) {
        localStringBuilder.append(",");
    }

    localStringBuilder.append(",,,4");
    localStringBuilder.append(calcNmeaCrc(localStringBuilder));
    return localStringBuilder.toString();
}
 

import android.location.GpsSatellite; //導入方法依賴的package包/類
private void updateStatus(GpsStatus status) {
    setStarted(true);	        
    Iterator<GpsSatellite> satellites = status.getSatellites().iterator();
    if (mPrns == null) {
        int length = status.getMaxSatellites();
        mPrns = new int[length];
        mSnrs = new float[length];
        mSvElevations = new float[length];
        mSvAzimuths = new float[length];
    }
    mSvCount = 0;	       
    while (satellites.hasNext()) {
        GpsSatellite satellite = satellites.next();
        int prn = satellite.getPrn();
        mPrns[mSvCount] = prn;
        mSnrs[mSvCount] = satellite.getSnr();
        mSvElevations[mSvCount] = satellite.getElevation();
        mSvAzimuths[mSvCount] = satellite.getAzimuth();	            
        mSvCount++;
    }
    mAdapter.notifyDataSetChanged();
}
 

import android.location.GpsSatellite; //導入方法依賴的package包/類
public static String formatGpsGsa(GpsStatus gps) {
    String fix = "1";
    String prn = "";
    int nbr_sat = 0;
    Iterator<GpsSatellite> satellites = gps.getSatellites().iterator();
    for (int i = 0; i < 12; i++) {
        if (satellites.hasNext()) {
            GpsSatellite sat = satellites.next();
            if (sat.usedInFix()) {
                prn = prn + sat.getPrn();
                nbr_sat++;
            }
        }

        prn = prn + ",";
    }

    if (nbr_sat > 3)
        fix = "3";
    else if (nbr_sat > 0)
        fix = "2";

    //TODO: calculate DOP values
    return fix + "," + prn + ",,,";
}
 

import android.location.GpsSatellite; //導入方法依賴的package包/類
public static int calSatelliteUseInFix(List<GpsSatellite> satellites) {
    int count = 0;
    for (GpsSatellite s : satellites) {
        if ((s.getPrn() > 0) && s.usedInFix())
            count++;
    }
    return count;
}
 

import android.location.GpsSatellite; //導入方法依賴的package包/類
public void onGpsStatusChanged(int event) {

			switch (event) {
			case GpsStatus.GPS_EVENT_FIRST_FIX:
				Log.i(TAG, "第一次定位");

				intent.putExtra("GPS_info", "第一次定位");
				sendBroadcast(intent);

				break;

			case GpsStatus.GPS_EVENT_SATELLITE_STATUS:

				// 獲取當前狀態
				gs = locationManager.getGpsStatus(null);
				int maxSatellites = gs.getMaxSatellites();// 獲取衛星顆數的默認最大值
				Iterator<GpsSatellite> iters = gs.getSatellites().iterator();
				// 創建一個迭代器保存所有衛星
				int count = 0;
				String info = "";

				while (iters.hasNext() && count <= maxSatellites) {
					GpsSatellite s = iters.next();
					count++;
					info += count + "\t:" + s.getPrn() + "\t信噪比:" + s.getSnr()
							+ "\t方位角:" + s.getAzimuth() + "\t海拔:"
							+ s.getElevation() + "\n";
				}

				if (count != 0)
					Status = "\n搜索到：" + count + "顆衛星\n" + info;
				else
					Status = "\n未搜索到衛星\n";

				// Log.i(TAG, "您當前的位置是:\n" + lastLocation + Status);

				intent.putExtra("GPS_info", "您當前的位置是:\n" + lastLocation
						+ Status);
				sendBroadcast(intent);

				break;

			case GpsStatus.GPS_EVENT_STARTED:// 定位啟動

				Log.i(TAG, "定位啟動");

				intent.putExtra("GPS_info", "定位啟動");
				sendBroadcast(intent);

				break;
			case GpsStatus.GPS_EVENT_STOPPED:// 定位結束
				Log.i(TAG, "定位結束");

				intent.putExtra("GPS_info", "定位結束");
				sendBroadcast(intent);
				break;
			}
		}
 

import android.location.GpsSatellite; //導入方法依賴的package包/類
/**
 * Initializes the SNR grid.
 * <p>
 * This method iterates through {@link #mSats} to determine which ranges of
 * NMEA IDs will be drawn. 
 */
protected void initializeGrid() {
	// iterate through list to find out how many bars to draw
	if (mSats != null)
		for (GpsSatellite sat : mSats) {
			int prn = sat.getPrn();
			if (prn < 1) {
				Log.wtf(TAG, String.format("Got satellite with invalid NMEA ID %d", prn));
			} else if (prn <= 32) {
				draw_1_32 = true;
			} else if (prn <= 54) {
				draw_33_54 = true;
			} else if (prn <= 64) {
				// most likely an extended SBAS range, display the lower range, too
				draw_33_54 = true;
				draw_55_64 = true;
			} else if (prn <= 88) {
				draw_65_88 = true;
			} else if (prn <= 96) {
				// most likely an extended GLONASS range, display the lower range, too
				draw_65_88 = true;
				draw_89_96 = true;
			} else if (prn <= 192) {
				draw_97_192 = true; // TODO: do we really want to enable this huge 96-sat block?
				Log.w(TAG, String.format("Got satellite with NMEA ID %d (from the huge unassigned 97-192 range)", prn));
			} else if (prn <= 195) {
				draw_193_195 = true;
			} else if (prn <= 200) {
				// most likely an extended QZSS range, display the lower range, too
				draw_193_195 = true;
				draw_196_200 = true;
			} else if (prn <= 235) {
				draw_201_235 = true;
			} else if (prn <= 300) {
				draw_236_300 = true; // TODO: same as above, do we really want to enable this?
			} else if (prn <= 336) {
				draw_301_336 = true;
			} else {
				Log.w(TAG, String.format("Got satellite with NMEA ID %d, possibly unsupported system", prn));
			}
		}
	/*
	 * If we didn't get any valid ranges, display at least the GPS range.
	 * No need to check for extended ranges here - if they get drawn, so
	 * will their corresponding base range.
	 */
	if (!(draw_1_32 || draw_33_54 || draw_65_88 || draw_97_192 || draw_193_195 || draw_201_235
			|| draw_236_300 || draw_301_336))
		draw_1_32 = true;
}