android GPS JAVA应用程序编程-------获得经纬度，卫星信息等

Java代码
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();
   }

补充：移动开发 , Android ,