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Android GPS JAVA应用程序编程：获得经纬度，卫星信息等
[日期：2011-07-28] 来源：Linux社区 作者：CAIYUNFREEDOM Android GPS JAVA应用程序编程：获得经纬度，卫星信息等 package android.test; import java.util.Iterator; import Android.app.Activity; 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.os.Bundle; import Android.location.GpsStatus.Listener; import Android.location.GpsStatus; import Android.util.Log; import Android.view.View; import Android.widget.Button; import Android.widget.TextView; import Android.widget.Toast; public class TestActivity extends Activity implements LocationListener { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { Log.i(tag, "on Create"); super.onCreate(savedInstanceState); setContentView(R.layout.main); btn=(Button)findViewById(R.id.btn); tv1=(TextView)findViewById(R.id.tv1); tv2=(TextView)findViewById(R.id.tv1); listener = new GpsStatus.Listener() { public void onGpsStatusChanged(int event) { gpsstatus=mgr.getGpsStatus(null); switch(event) { case GpsStatus.GPS_EVENT_FIRST_FIX:gpsstatus.getTimeToFirstFix(); case GpsStatus.GPS_EVENT_SATELLITE_STATUS: //得到所有收到的卫星的信息，包括 卫星的高度角、方位角、信噪比、和伪随机号（及卫星编号） Iterable<GpsSatellite> allSatellites; allSatellites = gpsstatus.getSatellites(); Iterator it=allSatellites.iterator(); String msg=""; while(it.hasNext()) { GpsSatellite oSat = (GpsSatellite) it.next() ; msg="azimuth:"+oSat.getAzimuth(); msg+="\nprn:"+oSat.getPrn(); msg+="\nsnr:"+oSat.getSnr(); } tv2.setText(msg); break; case GpsStatus.GPS_EVENT_STARTED: //Event sent when the GPS system has started. break; case GpsStatus.GPS_EVENT_STOPPED: //Event sent when the GPS system has stopped. break; default : break; } } }; btn.setOnClickListener(new Button.OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub Log.i(tag, "on button click"); getdata(); show(); } }); } void show() { String msg=""; msg+="latitude:"+latitude; msg+="\nlongtitude:"+longtitude; msg+="\naltitude:"+altitude; msg+="\naccuracy:"+accuracy; msg+="\nbearing:"+bearing; msg+="\nspeed:"+speed; msg+="\ntime:"+time; tv1.setText(msg); //Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); } GpsStatus.Listener listener; private GpsStatus gpsstatus; private final String tag="TEST_MAY"; private LocationManager mgr; private Button btn; private TextView tv1,tv2; private String best; private double latitude; private double longtitude; private double altitude; private float accuracy; private float bearing; private float speed; private long time; private void getdata() { try {mgr=(LocationManager)getSystemService(LOCATION_SERVICE); mgr.addGpsStatusListener(listener); Criteria criteria= new Criteria(); best=mgr.getBestProvider(criteria, true); Location location= mgr.getLastKnownLocation("gps"); if(location.hasAccuracy()) accuracy=location.getAccuracy(); Log.d(tag, "getdata"); if(location.hasAltitude()) altitude=location.getAltitude(); if(location.hasBearing()) bearing=location.getBearing(); if(location.hasSpeed()) speed=location.getSpeed(); Log.d(tag, "getsomedata"); latitude=location.getLatitude(); longtitude=location.getLongitude(); time=location.getTime(); } catch( NullPointerException e) { } } @Override public void onLocationChanged(Location location) { // TODO Auto-generated method stub Toast.makeText(this, location.toString(), Toast.LENGTH_SHORT).show(); } @Override public void onProviderDisabled(String provider) { // TODO Auto-generated method stub Toast.makeText(this, provider+" disable", Toast.LENGTH_SHORT).show(); } @Override public void onProviderEnabled(String provider) { // TODO Auto-generated method stub Toast.makeText(this, provider+" enable", Toast.LENGTH_LONG).show(); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { // TODO Auto-generated method stub Toast.makeText(this, status+" changed", Toast.LENGTH_SHORT).show(); } } |
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