GPS数据遵循NMEA-0183协议，该数据标准是由NMEA（National Marine Electronics Association，美国国家海事电子协会）于1983年制定的。统一标准格式NMEA-0183输出采用ASCII 码，其串行通信的参数为：波特率＝4800bps，数据位＝8bit，开始位=1bit，停止位＝1bit，无奇偶校验。
数据传输以“语句”的方式进行，每个语句均以“$”开头，然后是两个字母的“识别符”和三个字母的“语句名”，接着就是以逗号分割的数据体，语句末尾为校验和，整条语句以回车换行符结束。
NMEA-0183的数据信息有十几种，这些信息的作用分别是：$GPGGA：输出GPS的定位信息；$GPGLL：输出大地坐标信息；$GPZDA：输出UTC时间信息；$GPGSV：输出可见的卫星信息；$GPGST：输出定位标准差信息；$GPGSA：输出卫星DOP值信息；$GPALM：输出卫星星历信息；$GPRMC：输出GPS推荐的最短数据信息等。
这段话在我的这个博客上也有说明：GPS NMEA-0183标准详解（常用的精度以及经纬度坐标）
现在就是对原始的数据进行解析。
关于android loction的调用可参考以下：
android location 数据标准输出，原始mnea输出和GpsStatus卫星状态的变化
android 模拟位置信息Location使用示例
android 自带gps定位Location相关知识
1，看实现的效果
2，代码主要解析
根据namea标准解析如下
package com.example.gpsstatus;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.google.common.primitives.Bytes;
import android.annotation.SuppressLint;
import android.util.Log;
/**
* 标准nmea数据解析
* @author mmsx
*
*/
public class GpsAnalysis {
List<Byte> gps_data = new ArrayList<Byte>();
private List<GpsSatelliteInfo> satelliteList = new ArrayList<GpsSatelliteInfo>();
private List<GpsSatelliteInfo> GPSList = new ArrayList<GpsSatelliteInfo>();
private List<GpsSatelliteInfo> BDList = new ArrayList<GpsSatelliteInfo>();
private List<GpsSatelliteInfo> GLONASSList = new ArrayList<GpsSatelliteInfo>();
private boolean bUsedGPS;
private boolean bUsedGlonass;
private boolean bUsedBDS;
private boolean bUsedGalileo;
public boolean m_bUpdating;
int GSVIndex = 0;
private double hrms, vrms, rms;
private double SigmaEast, SigmaNorth;
private long Time;// 当前时间 与(2009,1,1,0,0,0,0)的时间差
private double deltTime;// 当前时间 与上一历元的时间差
private Date utcDate;
private Date gpsDate;
private String strGsa = "";// 用于保存GSA里面的卫星数据
private int year, month, day;
private double pdop;
private double hdop;
private double vdop;
private int age;// 差分龄
private int m_tSatNum, m_SatNum;// m_tSatNum：可见卫星数；
private double dUndulation;// 大地水准面与WGS84之间的高程异常
private int gpsStatue;// GPS状态，0：无效定位（正在搜索卫星...）；1：单点定位；2：差分定位；3：浮动；4：固定；5：超宽巷模糊度的固定；
public static long m_TimeStamp = 0;
private double fSpeed_M_S;// 速度 ,m/s
private double heading;// 方位，角度格式：弧度
private volatile static GpsAnalysis gpsAnalysis = null;
//经纬度
private double latitude = 0;
private double longitude = 0;
private double altitude = 0;
public static GpsAnalysis getInstance() {
synchronized (GpsAnalysis.class) {
if(gpsAnalysis == null)
gpsAnalysis =new GpsAnalysis();
}
return gpsAnalysis;
}
public void processBinaryData(byte[] temp, int len) {
// Log.e("二进制数据", "开始");
if (gps_data.size() > 4096 - len) {
gps_data.clear();
}
for (int i = 0; i < len; i++) {
gps_data.add(temp[i]);
}
for (int i = 0; i < gps_data.size() - 1; i++) {
if (gps_data.get(i) == 0x0D && gps_data.get(i + 1) == 0x0A) {
String strs = "";
byte[] byteArray = Bytes.toArray(gps_data);
try {
strs = new String(byteArray, 0, i + 2, "UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (strs.contains("$")) {
processNmeaData(strs);
}
for (int ii = i + 1; ii >= 0; ii--) {
gps_data.remove(ii);
}
i = 0;
continue;
}
}
return;
}
private boolean checkNMEAData(String strData) {
int nCheckSum, index = -1;
String str, str0;
if (strData.indexOf("*") == -1) {
return false;
}
if (strData.indexOf("$") == -1)
return false;
if (strData.indexOf("$") > strData.indexOf("*"))
return false;
String stem = (strData.substring(0, strData.indexOf("*")));
byte[] cData = stem.getBytes();
nCheckSum = cData[1];
for (int n = 2; n < cData.length; n++)// 值校验
{
nCheckSum ^= cData[n];
}
str = String.format(("%02x"), nCheckSum);
index = strData.indexOf("*");
if (index == -1)
return false;
if (strData.length() < index + 3)
return false;
str0 = strData.substring(index + 1, index + 3);
if (str.equalsIgnoreCase(str0)) {
return true;
} else {
Log.e("CheckNmea", strData);
Log.e("计算校验值", str);
return false;
}
}
public static int stringNumbers(String str, String specter) {
int count = 0;
char c = specter.charAt(0);
for (int i = 0; i < str.length(); i++) {
char tmp = str.charAt(i);
if (Character.valueOf(c).equals(Character.valueOf(tmp))) {
count += 1;
}
}
return count;
}
@SuppressLint("DefaultLocale")
public void processNmeaData(String nmea) {
if (nmea.length() == 0)
return;
if (!checkNMEAData(nmea)) {
// 可能是A318的命令返回值
return;
}
// Log.e("NMEA完整语句", nmea);
if (!nmea.startsWith("$GPPWR,") && !nmea.startsWith("$GNGST,")
&& !nmea.startsWith("$GPGST,") && !nmea.startsWith("$GLGSV,")
&& !nmea.startsWith("$GNGSV,") && !nmea.startsWith("$BDGSV,")
&& !nmea.startsWith("$GPZDA,") && !nmea.startsWith("$GPGSA,")
&& !nmea.startsWith("$GNVTG,") && !nmea.startsWith("$GPVTG,")
&& !nmea.startsWith("$GNGSA,") && !nmea.startsWith("$GPNTR,")
&& !nmea.startsWith("$GNGGA,") && !nmea.startsWith("$GPGGA,")
&& !nmea.startsWith("$GPRMC,") && !nmea.startsWith("$GPGSV,")
&& !nmea.startsWith("$BDGSA,"))
return;
String[] sField = nmea.split(",");
int iFieldNum = stringNumbers(nmea, ",");
if (sField == null)
return;
if ((sField[0].equalsIgnoreCase("$GPGGA") || sField[0]
.equalsIgnoreCase("$GNGGA")) && iFieldNum >= 14) {
if (sField[6].trim().length() > 0) {
switch (Integer.valueOf(sField[6])) {
case 0:// 无效定位
gpsStatue = 0;
break;
case 1:// 单点
gpsStatue = 1;
break;
case 2:// 差分
gpsStatue = 2;
break;
case 3:
case 4:// 固定
case 8:
gpsStatue = 4;
break;
case 5:// 浮动
gpsStatue = 3;
break;
}
if (sField[2].trim().length() > 3) {
latitude = Double.valueOf(sField[2].substring(0, 2))
+ Double.valueOf(sField[2].substring(2)) / 60;
}
if (sField[3] == "S")
latitude *= -1.0;
if (sField[4].trim().length() > 4) {
longitude = Double.valueOf(sField[4].substring(0, 3))
+ Double.valueOf(sField[4].substring(3)) / 60;
}
if (sField[5] == "W") {
longitude *= -1.0;
longitude += 360;
}
if (sField[7].trim().length() > 0) {
m_SatNum = Integer.valueOf(sField[7]);
} else {
m_SatNum = 0;
}
if (sField[9].trim().length() > 0) {
if (sField[11].trim().length() == 0)
sField[11] = "0";
altitude = Double.valueOf(sField[9]) + Double.valueOf(sField[11]);
dUndulation = Double.valueOf(sField[11]);
}
}
if (sField[13].trim().length() > 0) {
age = Integer.valueOf(sField[13]);
} else {
age = 99;
}
int m_Sec = 1, iSecOff = 0;
int m_Hour = 1, m_Min = 1;
if (sField[1].trim().length() >= 6) {
m_Hour = Integer.valueOf(sField[1].substring(0, 2));
m_Min = Integer.valueOf(sField[1].substring(2, 4));
m_Sec = Integer.valueOf(sField[1].substring(4, 6));
}
if (m_Sec > 59) {
iSecOff = m_Sec - 59;
m_Sec = 59;
}
if (m_Hour < 0 || m_Hour > 23 || m_Min < 0 || m_Min > 59
|| iSecOff > 60) {
return;
}
String sDate = String.format("%04d-%02d-%02d %02d:%02d:%02d", year,
month, day, m_Hour, m_Min, m_Sec);
gpsDate = DateUtil.GetLocalDate(DateUtil.parseDate(sDate));
Time = DateUtil.GetGPSTimeSpan(gpsDate) / 1000;
deltTime = 1;
m_TimeStamp = Time;
} else if ((sField[0].equalsIgnoreCase("$GPGSA")
|| sField[0].equalsIgnoreCase("$GNGSA") || sField[0]
.equalsIgnoreCase("$BDGSA")) && iFieldNum >= 17) {
if (strGsa.trim() == "") {
if (nmea.indexOf(",,") >= 11)
strGsa = nmea.substring(11, nmea.indexOf(",,"));
} else {
if (nmea.indexOf(",,") >= 11)
strGsa = String.format("%s,%s", strGsa,
nmea.substring(11, nmea.indexOf(",,")));
}
if (sField[15].trim().length() > 0) {
pdop = Double.valueOf(sField[15]);
}
if (sField[16].trim().length() > 0)
hdop = Double.valueOf(sField[16]);
if (sField[17].trim().length() > 0 && sField[17].indexOf("*") != -1) {
sField[17] = sField[17].substring(0, sField[17].indexOf("*"));
if (sField[17].trim().length() > 0)
vdop = Double.valueOf(sField[17]);
}
} else if (sField[0].equalsIgnoreCase("$GPRMC")
|| sField[0].equalsIgnoreCase("$GNRMC")
|| sField[0].equalsIgnoreCase("$GLRMC")
|| sField[0].equalsIgnoreCase("$BDRMC")) {
if (sField[7].trim().length() > 0) {
fSpeed_M_S = Double.valueOf(sField[7]) * 1.852 / 3600 * 1000;
}
if (sField[7].trim().length() > 0) {
if (Double.valueOf(sField[7]) > 0.05) {
if (sField[8].trim().length() > 0)
heading = Double.valueOf(sField[8]);
}
}
long m_Year = 1900, m_Month = 1, m_Day = 1;
if (sField[9].trim().length() > 5) {
m_Year = Integer.valueOf(sField[9].substring(4));
m_Month = Integer.valueOf(sField[9].substring(2, 4));
m_Day = Integer.valueOf(sField[9].substring(0, 2));
}
if (m_Year >= 89)
m_Year += 1900;
else
m_Year += 2000;
if (m_Year < 1990 || m_Year > 2099 || m_Month < 1 || m_Month > 12
|| m_Day < 1 || m_Day > 31) {
m_Year = m_Month = m_Day = 0;
return;
}
int m_Sec = 0, iSecOff = 0;
int m_Hour = 1, m_Min = 1;
if (sField[1].trim().length() >= 6) {
m_Hour = Integer.valueOf(sField[1].substring(0, 2));
m_Min = Integer.valueOf(sField[1].substring(2, 4));
m_Sec = Integer.valueOf(sField[1].substring(4, 6));
}
if (m_Sec > 59) {
iSecOff = m_Sec - 59;
m_Sec = 59;
}
if (m_Hour < 0 || m_Hour > 23 || m_Min < 0 || m_Min > 59
|| iSecOff > 60) {
return;
}
String sDate = String.format("%04d-%02d-%02d %02d:%02d:%02d",
m_Year, m_Month, m_Day, m_Hour, m_Min, m_Sec);
// Log.e("开始时间", sDate);
year = (int) m_Year;
month = (int) m_Month;
day = (int) m_Day;
gpsDate = DateUtil.GetLocalDate(DateUtil.parseDate(sDate));
m_TimeStamp = Time;
} else if (sField[0].equalsIgnoreCase("$GPZDA") && iFieldNum >= 5) {
long m_Year = 1900, m_Month = 1, m_Day = 1;
if (sField[4].trim().length() > 0) {
m_Year = Integer.valueOf(sField[4]);
}
if (sField[3].trim().length() > 0) {
m_Month = Integer.valueOf(sField[3]);
}
if (sField[4].trim().length() > 0) {
m_Day = Integer.valueOf(sField[2]);
}
if (m_Year < 1990 || m_Year > 2099 || m_Month < 1 || m_Month > 12
|| m_Day < 1 || m_Day > 31) {
return;
}
int m_Sec = 1, iSecOff = 0;
int m_Hour = 1, m_Min = 1;
if (sField[1].trim().length() >= 6) {
m_Hour = Integer.valueOf(sField[1].substring(0, 2));
m_Min = Integer.valueOf(sField[1].substring(2, 4));
m_Sec = Integer.valueOf(sField[1].substring(4, 6));
}
if (m_Sec > 59) {
iSecOff = m_Sec - 59;
m_Sec = 59;
}
if (m_Hour < 0 || m_Hour > 23 || m_Min < 0 || m_Min > 59
|| iSecOff > 60) {
return;
}
// Log.e("开始时间", sDate);
year = (int) m_Year;
month = (int) m_Month;
day = (int) m_Day;
String sDate = String.format("%04d-%02d-%02d %02d:%02d:%02d",
m_Year, m_Month, m_Day, m_Hour, m_Min, m_Sec);
gpsDate = DateUtil.GetLocalDate(DateUtil.parseDate(sDate));
utcDate = (DateUtil.parseDate(sDate));
Time = DateUtil.GetGPSTimeSpan(gpsDate) / 1000;
m_TimeStamp = Time;
} else if (sField[0].equalsIgnoreCase("$GPVTG")
|| sField[0].equalsIgnoreCase("$GNVTG")
|| sField[0].equalsIgnoreCase("$GLVTG")
|| sField[0].equalsIgnoreCase("$BDVTG")) {
if (sField[8].trim() == ("K")) {
fSpeed_M_S = Double.valueOf(sField[7]) * 1000 / 3600;
}
if (sField[7].trim().length() > 0) {
if (Double.valueOf(sField[7]) > 0.05) {
if (sField[1].trim().length() > 0)
heading = Double.valueOf(sField[1]);
}
}
} else if (sField[0].equalsIgnoreCase("$GPGSV")
|| sField[0].equalsIgnoreCase("$GNGSV")) {
if (Integer.valueOf(sField[2]) == 1) {
GSVIndex = 1;
m_tSatNum = 0;
GPSList.clear();
satelliteList.clear();
m_bUpdating = true;
if (BDList.size() > 0) {
bUsedBDS = true;
for (int i = 0; i < BDList.size(); i++) {
GpsSatelliteInfo sGPS = BDList.get(i);
satelliteList.add(sGPS);
m_tSatNum++;
}
} else {
bUsedBDS = false;
}
if (GLONASSList.size() > 0) {
bUsedGlonass = true;
for (int i = 0; i < GLONASSList.size(); i++) {
GpsSatelliteInfo sGPS = GLONASSList.get(i);
satelliteList.add(sGPS);
m_tSatNum++;
}
} else {
bUsedGlonass = false;
}
} else
GSVIndex++;
if (Integer.valueOf(sField[2]) == GSVIndex) {
int rec;
for (int i = 0; i < 4; i++) {
rec = i * 4 + 4;
if (rec < iFieldNum) {
if (sField[rec + 3].indexOf("*") != -1) {
sField[rec + 3] = (sField[rec + 3].substring(0,
sField[rec + 3].indexOf("*")));//
}
if (rec + 3 <= iFieldNum
&& (!sField[rec].equalsIgnoreCase(""))
&& (!sField[rec + 1].equalsIgnoreCase(""))
&& (!sField[rec + 3].equalsIgnoreCase(""))) {
GpsSatelliteInfo sGPS = new GpsSatelliteInfo();
sGPS.setAzimuth(Short.valueOf(sField[rec + 2]));
if (sField[rec + 1].indexOf(".") != -1)
sField[rec + 1] = sField[rec + 1].substring(0,
sField[rec + 1].indexOf("."));
sGPS.setElevation(Integer.valueOf(sField[rec + 1]));
sGPS.setPrn(Integer.valueOf(sField[rec]));
if (sField[rec + 3].indexOf(".") != -1) {
sField[rec + 3] = sField[rec + 3].substring(0,
sField[rec + 3].indexOf("."));
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));
} else {
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));//
}
sGPS.setbUsed(strGsa.contains(sField[rec]));
GPSList.add(sGPS);
satelliteList.add(sGPS);
// m_SatNum++;
m_tSatNum++;
}
// m_tSatNum++;
}
}
}
if (Integer.valueOf(sField[1]) == GSVIndex) {
m_bUpdating = false;
}
} else if (sField[0].equalsIgnoreCase("$GLGSV")) {
if (Integer.valueOf(sField[2]) == 1) {
GLONASSList.clear();
GSVIndex = 1;
m_bUpdating = true;
} else
GSVIndex++;
if (Integer.valueOf(sField[2]) == GSVIndex) {
int rec;
for (int i = 0; i < 4; i++) {
rec = i * 4 + 4;
if (rec + 3 <= iFieldNum) {
if (sField[rec + 3].indexOf("*") != -1) {
sField[rec + 3] = (sField[rec + 3].substring(0,
sField[rec + 3].indexOf("*")));//
}
if (sField[rec + 3].indexOf("*") != -1) {
sField[rec + 3] = (sField[rec + 3].substring(0,
sField[rec + 3].indexOf("*")));//
}
if ((!sField[rec].equalsIgnoreCase(""))
&& (!sField[rec + 1].equalsIgnoreCase(""))
&& (!sField[rec + 3].equalsIgnoreCase(""))) {
GpsSatelliteInfo sGPS = new GpsSatelliteInfo();
sGPS.setAzimuth(Short.valueOf(sField[rec + 2]));
if (sField[rec + 1].indexOf(".") != -1)
sField[rec + 1] = sField[rec + 1].substring(0,
sField[rec + 1].indexOf("."));
sGPS.setElevation(Integer.valueOf(sField[rec + 1]));
sGPS.setPrn(Integer.valueOf(sField[rec]));
if (sField[rec + 3].indexOf(".") != -1) {
sField[rec + 3] = sField[rec + 3].substring(0,
sField[rec + 3].indexOf("."));
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));
} else {
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));//
}
// sGPS.setSnrL1(Integer.valueOf(sField[rec +
// 3]));//
sGPS.setbUsed(strGsa.contains(sField[rec]));
GLONASSList.add(sGPS);
if (!bUsedGlonass) {
satelliteList.add(sGPS);
}
}
}
}
}
if (Integer.valueOf(sField[1]) == GSVIndex) {
m_bUpdating = false;
}
} else if (sField[0].equalsIgnoreCase("$BDGSV")) {
if (Integer.valueOf(sField[2]) == 1) {
BDList.clear();
GSVIndex = 1;
m_bUpdating = true;
} else
GSVIndex++;
if (Integer.valueOf(sField[2]) == GSVIndex) {
int rec;
for (int i = 0; i < 4; i++) {
rec = i * 4 + 4;
if (rec + 3 <= iFieldNum) {
if (sField[rec + 3].indexOf("*") != -1) {
sField[rec + 3] = (sField[rec + 3].substring(0,
sField[rec + 3].indexOf("*")));//
}
if ((!sField[rec].equalsIgnoreCase(""))
&& (!sField[rec + 1].equalsIgnoreCase(""))
&& (!sField[rec + 3].equalsIgnoreCase(""))) {
GpsSatelliteInfo sGPS = new GpsSatelliteInfo();
sGPS.setAzimuth(Short.valueOf(sField[rec + 2]));
if (sField[rec + 1].indexOf(".") != -1)
sField[rec + 1] = sField[rec + 1].substring(0,
sField[rec + 1].indexOf("."));
sGPS.setElevation(Integer.valueOf(sField[rec + 1]));
sGPS.setPrn((Integer.valueOf(sField[rec])));
if (sField[rec + 3].indexOf(".") != -1) {
sField[rec + 3] = sField[rec + 3].substring(0,
sField[rec + 3].indexOf("."));
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));
} else {
sGPS.setSnrL1(Integer.valueOf(sField[rec + 3]));//
}
sGPS.setbUsed(strGsa.contains(sField[rec]));
BDList.add(sGPS);
// m_SatNum++;
// m_tSatNum++;
if (!bUsedBDS) {
satelliteList.add(sGPS);
}
}
// m_tSatNum++;
}
}
}
if (Integer.valueOf(sField[1]) == GSVIndex) {
m_bUpdating = false;
}
} else if (((sField[0].equalsIgnoreCase("$GPGST")) || (sField[0]
.equalsIgnoreCase("$GNGST"))) && iFieldNum >= 8) {
if (sField[7].trim().length() > 0) {
SigmaEast = Double.valueOf(sField[7]);
}
if (sField[6].trim().length() > 0) {
SigmaNorth = Double.valueOf(sField[6]);
}
if (sField[8].indexOf("*") != -1) {
sField[8] = (sField[8].substring(0, sField[8].indexOf("*")));//
}
if (sField[8].trim().length() > 0) {
vrms = Double.valueOf(sField[8]);
}
hrms = Math.sqrt(SigmaEast * SigmaEast + SigmaNorth * SigmaNorth);
rms = Math.sqrt(hrms * hrms + vrms * vrms);
}
}
public double getVdop() {
return vdop;
}
public double getHdop() {
return hdop;
}
public double getPdop() {
return pdop;
}
public double getHrms() {
return hrms;
}
public double getVrms() {
return vrms;
}
//纬度
public double getLatitude() {
return latitude;
}
//经度
public double getLongitude() {
return longitude;
}
//椭球高
public double getAltitude() {
return altitude;
}
//解状态
public int getStatusType() {
return gpsStatue;
}
//速度
public double getSpeed() {
return fSpeed_M_S;
}
//方位角 航向角
public double getBearing() {
return heading;
}
//可见卫星
public int getVisibleGnssCount() {
return m_tSatNum;
}
//可视卫星
public int getLockGnssCount() {
return m_SatNum;
}
//差分龄
public int getAge() {
return age;
}
public Date getLocalTime() {
return gpsDate;
}
public Date getUtcTime() {
return utcDate;
}
public List<GpsSatelliteInfo> getSatelliteList(){
return satelliteList;
}
}
传递location的原始输出：
怎么调用呢，请看下文
package com.example.gpsstatus;
import java.util.Iterator;
import android.location.GpsSatellite;
import android.location.GpsStatus;
import android.location.GpsStatus.Listener;
import android.location.GpsStatus.NmeaListener;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.TextView;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
public class MainActivity extends Activity implements OnClickListener{
LocationManager mLocationManager;
Location mlocation;
TextView mTextView;
TextView mTextView2;
TextView mTextView3;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView)findViewById(R.id.textView1);
mTextView2 = (TextView)findViewById(R.id.textView2);
mTextView3 = (TextView)findViewById(R.id.textView3);
findViewById(R.id.button1).setOnClickListener(this);
findViewById(R.id.button2).setOnClickListener(this);
getLocation();
}
public void getLocation(){
if(mLocationManager == null)
mLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
if(mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,0, 0, mLocationListener);
mLocationManager.addNmeaListener(mNmeaListener);
mLocationManager.addGpsStatusListener(mStatusChanged);
}
}
// 卫星状态变化
Listener mStatusChanged = new Listener() {
@Override
public void onGpsStatusChanged(int arg0) {
GpsStatus statues = mLocationManager.getGpsStatus(null);
Iterator<GpsSatellite> iterator = statues.getSatellites().iterator();
GpsSatellite temSatellite = null;
//这里列表长度就是有多少颗卫星
while (iterator.hasNext()) {
temSatellite = iterator.next();
if (temSatellite.getSnr() <= 1E-2) {
continue;
}
//Prn 就是卫星号
//Snr 信噪比
// Azimuth 方位角
//Elevation 高度角
String strResult = "getSnr:" + temSatellite.getSnr() + "\r\n"
+ "getElevation:" + temSatellite.getElevation() + "\r\n"
+ "getPrn:" + temSatellite.getPrn() + "\r\n"
+ "getAzimuth:" + temSatellite.getAzimuth() + "\r\n"
+ "usedInFix:" + temSatellite.usedInFix() + "\r\n";
Log.i("Show", strResult);
if (mTextView3 != null) {
mTextView3.setText(strResult);
}
}
}
};
//打开GPS设置
public void OpenGpsSettingEvent() {
Intent callGPSSettingIntent = new Intent(
android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(callGPSSettingIntent);
}
LocationListener mLocationListener = new LocationListener() {
@TargetApi(17)
@Override
public void onLocationChanged(Location mlocal) {
if(mlocal == null) return;
String strResult = "getAccuracy:" + mlocal.getAccuracy() + "\r\n"
+ "getAltitude:" + mlocal.getAltitude() + "\r\n"
+ "getBearing:" + mlocal.getBearing() + "\r\n"
+ "getElapsedRealtimeNanos:" + String.valueOf(mlocal.getElapsedRealtimeNanos()) + "\r\n"
+ "getLatitude:" + mlocal.getLatitude() + "\r\n"
+ "getLongitude:" + mlocal.getLongitude() + "\r\n"
+ "getProvider:" + mlocal.getProvider()+ "\r\n"
+ "getSpeed:" + mlocal.getSpeed() + "\r\n"
+ "getTime:" + mlocal.getTime() + "\r\n";
Log.i("Show", strResult);
if (mTextView != null) {
mTextView.setText(strResult);
}
}
@Override
public void onProviderDisabled(String arg0) {
}
@Override
public void onProviderEnabled(String arg0) {
}
@Override
public void onStatusChanged(String provider, int event, Bundle extras) {
}
};
//$GPGGA,072024.0,2307.582054,N,11321.928800,E,1,07,0.7,45.2,M,-4.0,M,,*76
//原始数据监听
NmeaListener mNmeaListener = new NmeaListener() {
@Override
public void onNmeaReceived(long arg0, String arg1) {
GpsAnalysis.getInstance().processNmeaData(arg1);
if(arg1.contains("GPGGA")){
Log.i("Show",arg1);
String[] result = arg1.split(",");
if(result != null && result.length >= 11){
mTextView2.setText(GetnSolutionState(Integer.parseInt(result[6])));
}
}
}
};
private String GetnSolutionState(int nType) {
String strSolutionState = "";
switch (nType) {
case 0:
strSolutionState = "无效解";
break;
case 1:
strSolutionState = "单点解";
break;
case 2:
strSolutionState = "差分解";
break;
case 4:
strSolutionState = "固定解";
break;
case 5:
strSolutionState = "浮点解";
break;
default:
strSolutionState = "" + nType;
break;
}
return strSolutionState;
}
@Override
protected void onDestroy() {
super.onDestroy();
if(mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
mLocationManager.removeNmeaListener(mNmeaListener);
mLocationManager.removeUpdates(mLocationListener);
mLocationManager.removeGpsStatusListener(mStatusChanged);
}
}
@Override
protected void onResume() {
getLocation();
super.onDestroy();
}
@Override
public void onClick(View arg0) {
switch(arg0.getId()){
case R.id.button1:
OpenGpsSettingEvent() ;
break;
case R.id.button2:
startActivity(new Intent(this, SatellitesViewActivity.class));
break;
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle(getString(R.string.tip_text));
builder.setMessage(getString(R.string.exit_demo));
builder.setPositiveButton(getResources().getString(R.string.btn_sure), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
System.exit(0);
}
});
builder.setNegativeButton(getResources().getString(R.string.btn_cancer), null);
builder.show();
}
return super.onKeyDown(keyCode, event);
}
}
3，记得权限
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />