android GPS定位和卫星个数

package com.pdager.gps;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.location.GpsSatellite;import android.location.GpsStatus;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.provider.Settings;import android.text.format.Time;import android.view.KeyEvent;import android.widget.TextView;import android.widget.Toast;public class getlocation extends Activity {/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);openGPSSettings();}private void openGPSSettings() {LocationManager alm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);if (alm.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER)) {Toast.makeText(this, "GPS模块正常", Toast.LENGTH_SHORT).show();getLocation();return;}else{Toast.makeText(this, "请开启GPS！", Toast.LENGTH_SHORT).show();Intent intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);startActivityForResult(intent, R.layout.main); // 此为设置完成后返回到获取界面getLocation();return;}}LocationManager locationManager;private void getLocation() {// 获取位置管理服务String serviceName = Context.LOCATION_SERVICE;locationManager = (LocationManager) this.getSystemService(serviceName);// 查找到服务信息// Criteria criteria = new Criteria();// criteria.setAccuracy(Criteria.ACCURACY_FINE);// // 高精度// criteria.setAltitudeRequired(false);// criteria.setBearingRequired(false);// criteria.setCostAllowed(true);// criteria.setPowerRequirement(Criteria.POWER_LOW);// // 低功耗// String provider = locationManager.getBestProvider(criteria, true);// 获取GPS信息String provider = LocationManager.GPS_PROVIDER;Location location = locationManager.getLastKnownLocation(provider);// 通过GPS获取位置if (location == null)location = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);updateToNewLocation(location);// 设置监听器，自动更新的最小时间为间隔N秒(1秒为1*1000)或最小位移变化超过N米locationManager.requestLocationUpdates(provider, 1000, 0,locationListener);locationManager.addGpsStatusListener(statusListener); // 注册状态信息回调}private List<GpsSatellite> numSatelliteList = new ArrayList<GpsSatellite>(); // 卫星信号/** * 卫星状态监听器 */private final GpsStatus.Listener statusListener = new GpsStatus.Listener() {public void onGpsStatusChanged(int event) { // GPS状态变化时的回调，如卫星数GpsStatus status = locationManager.getGpsStatus(null); // 取当前状态updateGpsStatus(event, status);}};private void updateGpsStatus(int event, GpsStatus status) {if (event == GpsStatus.GPS_EVENT_SATELLITE_STATUS) {int maxSatellites = status.getMaxSatellites();Iterator<GpsSatellite> it = status.getSatellites().iterator();numSatelliteList.clear();int count = 0;while (it.hasNext() && count <= maxSatellites) {GpsSatellite s = it.next();numSatelliteList.add(s);count++;}}}private void updateToNewLocation(Location location) {// 获取系统时间Time t = new Time();t.setToNow(); // 取得系统时间int year = t.year;int month = t.month + 1;int date = t.monthDay;int hour = t.hour; // 24小时制int minute = t.minute;int second = t.second;TextView tv1;tv1 = (TextView) this.findViewById(R.id.tv1);if (location != null) {double latitude = location.getLatitude();// 经度double longitude = location.getLongitude();// 纬度double altitude = location.getAltitude(); // 海拔tv1.setText("搜索卫星个数：" + numSatelliteList.size() + "/n纬度："+ latitude + "/n经度：" + longitude + "/n海拔：" + altitude+ "/n时间：" + year + "年" + month + "月" + date + "日" + hour+ ":" + minute + ":" + second);} else {tv1.setText("无法获取地理信息");}}private final LocationListener locationListener = new LocationListener() {public void onLocationChanged(Location location) {// 当坐标改变时触发此函数，如果Provider传进相同的坐标，它就不会被触发if (location != null) {updateToNewLocation(location);Toast.makeText(getlocation.this, "您的位置已发生改变！",Toast.LENGTH_SHORT).show();}}public void onProviderDisabled(String provider) {// Provider被disable时触发此函数，比如GPS被关闭updateToNewLocation(null);}public void onProviderEnabled(String provider) {// Provider被enable时触发此函数，比如GPS被打开}public void onStatusChanged(String provider, int status, Bundle extras) {// Provider的转态在可用、暂时不可用和无服务三个状态直接切换时触发此函数}};public boolean onKeyDown(int keyCode, KeyEvent event) {if (keyCode == KeyEvent.KEYCODE_MENU) {// 拦截menu键事件// do something...System.exit(0);}if (keyCode == KeyEvent.KEYCODE_BACK) {// 拦截返回按钮事件// do something...System.exit(0);}return true;}}