Android GPS获取地理位置

import android.app.Activity;import android.content.Context;import android.location.Criteria;import android.location.Location;import android.location.LocationListener;import android.location.LocationManager;import android.os.Bundle;import android.widget.TextView;public class CurrentLocation extends Activity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        LocationManager locationManager;        String serviceName = Context.LOCATION_SERVICE;        locationManager = (LocationManager)getSystemService(serviceName);        //String provider = LocationManager.GPS_PROVIDER;                Criteria criteria = new Criteria();        criteria.setAccuracy(Criteria.ACCURACY_FINE);        criteria.setAltitudeRequired(false);        criteria.setBearingRequired(false);        criteria.setCostAllowed(true);        criteria.setPowerRequirement(Criteria.POWER_LOW);        String provider = locationManager.getBestProvider(criteria, true);                Location location = locationManager.getLastKnownLocation(provider);        updateWithNewLocation(location);        locationManager.requestLocationUpdates(provider, 2000, 10,                        locationListener);    }   private final LocationListener locationListener = new LocationListener() {            public void onLocationChanged(Location location) {            updateWithNewLocation(location);            }            public void onProviderDisabled(String provider){            updateWithNewLocation(null);            }            public void onProviderEnabled(String provider){ }            public void onStatusChanged(String provider, int status,            Bundle extras){ }    };    private void updateWithNewLocation(Location location) {            String latLongString;            TextView myLocationText;            myLocationText = (TextView)findViewById(R.id.myLocationText);            if (location != null) {            double lat = location.getLatitude();            double lng = location.getLongitude();            latLongString = "纬度:" + lat + "/n经度:" + lng;            } else {            latLongString = "无法获取地理信息";            }            myLocationText.setText("您当前的位置是:/n" +            latLongString);    }}

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