Android下GPRS定位

LocationManger locationManager&＃61;(LocationManager)this.getSystemService(Context.LOCATION_SERVICE);

private LocationListener locationListener&＃61;new LocationListener() {/*** 位置信息变化时触发*/public void onLocationChanged(Location location) {updateView(location);Log.i(TAG, "时间&＃xff1a;"&＃43;location.getTime()); Log.i(TAG, "经度&＃xff1a;"&＃43;location.getLongitude()); Log.i(TAG, "纬度&＃xff1a;"&＃43;location.getLatitude()); Log.i(TAG, "海拔&＃xff1a;"&＃43;location.getAltitude()); }/*** GPS状态变化时触发*/public void onStatusChanged(String provider, int status, Bundle extras) {switch (status) {//GPS状态为可见时
case LocationProvider.AVAILABLE:Log.i(TAG, "当前GPS状态为可见状态");break;//GPS状态为服务区外时
case LocationProvider.OUT_OF_SERVICE:Log.i(TAG, "当前GPS状态为服务区外状态");break;//GPS状态为暂停服务时
case LocationProvider.TEMPORARILY_UNAVAILABLE:Log.i(TAG, "当前GPS状态为暂停服务状态");break;}}/*** GPS开启时触发*/public void onProviderEnabled(String provider) {Location location&＃61;lm.getLastKnownLocation(provider);updateView(location);}/*** GPS禁用时触发*/public void onProviderDisabled(String provider) {updateView(null);}};

Location location&＃61;locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
system.out.println("时间&＃xff1a;"&＃43;location.getTime());
system.out.println("经度&＃xff1a;"&＃43;location.getLongitude());

//状态监听
GpsStatus.Listener listener &＃61; new GpsStatus.Listener() {public void onGpsStatusChanged(int event) {switch (event) {//第一次定位
case GpsStatus.GPS_EVENT_FIRST_FIX:Log.i(TAG, "第一次定位");break;//卫星状态改变
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:Log.i(TAG, "卫星状态改变");//获取当前状态
GpsStatus gpsStatus&＃61;lm.getGpsStatus(null);//获取卫星颗数的默认最大值
int maxSatellites &＃61; gpsStatus.getMaxSatellites();//创建一个迭代器保存所有卫星
Iterator iters &＃61; gpsStatus.getSatellites().iterator();int count &＃61; 0; while (iters.hasNext() && count <&＃61; maxSatellites) { GpsSatellite s &＃61; iters.next(); count&＃43;&＃43;; } System.out.println("搜索到&＃xff1a;"&＃43;count&＃43;"颗卫星");break;//定位启动
case GpsStatus.GPS_EVENT_STARTED:Log.i(TAG, "定位启动");break;//定位结束
case GpsStatus.GPS_EVENT_STOPPED:Log.i(TAG, "定位结束");break;}};};
//绑定监听状态
lm.addGpsStatusListener(listener);

GpsStatus&＃xff0c;GPS状态信息&＃xff0c;上面在卫星状态变化时&＃xff0c;我们就用到了GpsStatus。//实例化
GpsStatus gpsStatus &＃61; locationManager.getGpsStatus(null); // 获取当前状态
//获取默认最大卫星数
int maxSatellites &＃61; gpsStatus.getMaxSatellites();
//获取第一次定位时间&＃xff08;启动到第一次定位&＃xff09;
int costTime&＃61;gpsStatus.getTimeToFirstFix();
//获取卫星
Iterable iterable&＃61;gpsStatus.getSatellites();
//一般再次转换成Iterator
Iterator itrator&＃61;iterable.iterator();

//获取卫星
Iterable iterable&＃61;gpsStatus.getSatellites();
//再次转换成Iterator
Iterator itrator&＃61;iterable.iterator();
//通过遍历重新整理为ArrayList
ArrayList satelliteList&＃61;new ArrayList();
int count&＃61;0;
int maxSatellites&＃61;gpsStatus.getMaxSatellites();
while (itrator.hasNext() && count <&＃61; maxSatellites) { GpsSatellite satellite &＃61; itrator.next(); satelliteList.add(satellite); count&＃43;&＃43;;
}
System.out.println("总共搜索到"&＃43;count&＃43;"颗卫星");
//输出卫星信息
for(int i&＃61;0;i//卫星的方位角&＃xff0c;浮点型数据
System.out.println(satelliteList.get(i).getAzimuth()); //卫星的高度&＃xff0c;浮点型数据
System.out.println(satelliteList.get(i).getElevation()); //卫星的伪随机噪声码&＃xff0c;整形数据
System.out.println(satelliteList.get(i).getPrn()); //卫星的信噪比&＃xff0c;浮点型数据
System.out.println(satelliteList.get(i).getSnr()); //卫星是否有年历表&＃xff0c;布尔型数据
System.out.println(satelliteList.get(i).hasAlmanac()); //卫星是否有星历表&＃xff0c;布尔型数据
System.out.println(satelliteList.get(i).hasEphemeris()); //卫星是否被用于近期的GPS修正计算
System.out.println(satelliteList.get(i).hasAlmanac());
}

xml version&＃61;"1.0" encoding&＃61;"utf-8"?>
<LinearLayout xmlns:android&＃61;"http://schemas.android.com/apk/res/android"android:orientation&＃61;"vertical"android:layout_width&＃61;"fill_parent"android:layout_height&＃61;"fill_parent"><EditText android:layout_width&＃61;"fill_parent"android:layout_height&＃61;"wrap_content"android:cursorVisible&＃61;"false"android:editable&＃61;"false"android:id&＃61;"&＃64;&＃43;id/editText"/>
LinearLayout>

<uses-permission android:name&＃61;"android.permission.ACCESS_FINE_LOCATION"/><uses-permission android:name&＃61;"android.permission.ACCESS_COARSE_LOCATION"/>

package com.ljq.activity;import java.util.Iterator;import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.location.Criteria;
import android.location.GpsSatellite;
import android.location.GpsStatus;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.location.LocationProvider;
import android.os.Bundle;
import android.provider.Settings;
import android.util.Log;
import android.widget.EditText;
import android.widget.Toast;public class GpsActivity extends Activity {private EditText editText;private LocationManager lm;private static final String TAG&＃61;"GpsActivity";

 &＃64;Overrideprotected void onDestroy() {// TODO Auto-generated method stubsuper.onDestroy();lm.removeUpdates(locationListener);}

&＃64;Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);editText&＃61;(EditText)findViewById(R.id.editText);lm&＃61;(LocationManager)getSystemService(Context.LOCATION_SERVICE);//判断GPS是否正常启动
if(!lm.isProviderEnabled(LocationManager.GPS_PROVIDER)){Toast.makeText(this, "请开启GPS导航...", Toast.LENGTH_SHORT).show();//返回开启GPS导航设置界面
Intent intent &＃61; new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); startActivityForResult(intent,0); return;}//为获取地理位置信息时设置查询条件
String bestProvider &＃61; lm.getBestProvider(getCriteria(), true);//获取位置信息//如果不设置查询要求&＃xff0c;getLastKnownLocation方法传人的参数为LocationManager.GPS_PROVIDER
Location location&＃61; lm.getLastKnownLocation(bestProvider); updateView(location);//监听状态
lm.addGpsStatusListener(listener);//绑定监听&＃xff0c;有4个参数 //参数1&＃xff0c;设备&＃xff1a;有GPS_PROVIDER和NETWORK_PROVIDER两种//参数2&＃xff0c;位置信息更新周期&＃xff0c;单位毫秒 //参数3&＃xff0c;位置变化最小距离&＃xff1a;当位置距离变化超过此值时&＃xff0c;将更新位置信息 //参数4&＃xff0c;监听 //备注&＃xff1a;参数2和3&＃xff0c;如果参数3不为0&＃xff0c;则以参数3为准&＃xff1b;参数3为0&＃xff0c;则通过时间来定时更新&＃xff1b;两者为0&＃xff0c;则随时刷新 // 1秒更新一次&＃xff0c;或最小位移变化超过1米更新一次&＃xff1b;//注意&＃xff1a;此处更新准确度非常低&＃xff0c;推荐在service里面启动一个Thread&＃xff0c;在run中sleep(10000);然后执行handler.sendMessage(),更新位置
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1, locationListener);}//位置监听
private LocationListener locationListener&＃61;new LocationListener() {/*** 位置信息变化时触发*/public void onLocationChanged(Location location) {updateView(location);Log.i(TAG, "时间&＃xff1a;"&＃43;location.getTime()); Log.i(TAG, "经度&＃xff1a;"&＃43;location.getLongitude()); Log.i(TAG, "纬度&＃xff1a;"&＃43;location.getLatitude()); Log.i(TAG, "海拔&＃xff1a;"&＃43;location.getAltitude()); }/*** GPS状态变化时触发*/public void onStatusChanged(String provider, int status, Bundle extras) {switch (status) {//GPS状态为可见时
case LocationProvider.AVAILABLE:Log.i(TAG, "当前GPS状态为可见状态");break;//GPS状态为服务区外时
case LocationProvider.OUT_OF_SERVICE:Log.i(TAG, "当前GPS状态为服务区外状态");break;//GPS状态为暂停服务时
case LocationProvider.TEMPORARILY_UNAVAILABLE:Log.i(TAG, "当前GPS状态为暂停服务状态");break;}}/*** GPS开启时触发*/public void onProviderEnabled(String provider) {Location location&＃61;lm.getLastKnownLocation(provider);updateView(location);}/*** GPS禁用时触发*/public void onProviderDisabled(String provider) {updateView(null);}};//状态监听
GpsStatus.Listener listener &＃61; new GpsStatus.Listener() {public void onGpsStatusChanged(int event) {switch (event) {//第一次定位
case GpsStatus.GPS_EVENT_FIRST_FIX:Log.i(TAG, "第一次定位");break;//卫星状态改变
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:Log.i(TAG, "卫星状态改变");//获取当前状态
GpsStatus gpsStatus&＃61;lm.getGpsStatus(null);//获取卫星颗数的默认最大值
int maxSatellites &＃61; gpsStatus.getMaxSatellites();//创建一个迭代器保存所有卫星
Iterator iters &＃61; gpsStatus.getSatellites().iterator();int count &＃61; 0; while (iters.hasNext() && count <&＃61; maxSatellites) { GpsSatellite s &＃61; iters.next(); count&＃43;&＃43;; } System.out.println("搜索到&＃xff1a;"&＃43;count&＃43;"颗卫星");break;//定位启动
case GpsStatus.GPS_EVENT_STARTED:Log.i(TAG, "定位启动");break;//定位结束
case GpsStatus.GPS_EVENT_STOPPED:Log.i(TAG, "定位结束");break;}};};/*** 实时更新文本内容* * &＃64;param location*/private void updateView(Location location){if(location!&＃61;null){editText.setText("设备位置信息\n\n经度&＃xff1a;");editText.append(String.valueOf(location.getLongitude()));editText.append("\n纬度&＃xff1a;");editText.append(String.valueOf(location.getLatitude()));}else{//清空EditText对象
editText.getEditableText().clear();}}/*** 返回查询条件* &＃64;return*/private Criteria getCriteria(){Criteria criteria&＃61;new Criteria();//设置定位精确度 Criteria.ACCURACY_COARSE比较粗略&＃xff0c;Criteria.ACCURACY_FINE则比较精细
criteria.setAccuracy(Criteria.ACCURACY_FINE); //设置是否要求速度
criteria.setSpeedRequired(false);// 设置是否允许运营商收费
criteria.setCostAllowed(false);//设置是否需要方位信息
criteria.setBearingRequired(false);//设置是否需要海拔信息
criteria.setAltitudeRequired(false);// 设置对电源的需求
criteria.setPowerRequirement(Criteria.POWER_LOW);return criteria;}
}