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. / @Override public 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11000)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 numSatelliteList = new ArrayList(); // 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 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; } }