android 2.3 can not get latitude and longitude

android gps

Recently made a similar people near a micro-channel function like this, would like to get the latitude and longitude calculations, there is no problem on the 4.0, but in 2.3 it is not, seek the guidance of the great God.

 package org.crazyit.gps; 

import java.util.List; 

import android.app.Activity; 
import android.content.SharedPreferences; 
import android.content.SharedPreferences.Editor; 
import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 

public class LocationTest extends Activity {
private LocationManager manager; 
private SharedPreferences sp; 


public void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); 
setContentView (R.layout.main); 

manager = (LocationManager) getSystemService (LOCATION_SERVICE) ;/ / get cell phone location information 

List  providers = manager.getAllProviders (); 
/ / Conditions for access 
Criteria criteria = new Criteria (); 
criteria.setAccuracy (Criteria.ACCURACY_FINE) ;/ / obtain precise location 
criteria.setCostAllowed (true) ;/ / allows the overhead 
criteria.setPowerRequirement (Criteria.POWER_HIGH) ;/ / consume large, high frequency acquired 
criteria.setSpeedRequired (true) ;/ / phone position 
criteria.setAltitudeRequired (true) ;/ / altitude 

/ / Get the best provider: gps 
 are on the phone or emulatorString bestProvider = manager.getBestProvider (criteria, true) ;/ / use GPS satellite 

/ / System.out.println ("The best location provider is" + bestProvider); 
sp = getSharedPreferences ("config", MODE_PRIVATE); 

/ / Parameter:.. 1 provider 2 once every 3 How much time to get the number of meters every 4 listener trigger callback 
..manager.requestLocationUpdates (bestProvider, 3000,100, new MyLocationListener ()); 
} 

private class MyLocationListener implements LocationListener {

/ ** 
* Mobile location changes occur 
* / 
public void onLocationChanged (Location location) {
location.getAccuracy () ;/ / accuracy 
String latitude = location.getLatitude () + "" ;/ / longitude 
String longitude = location.getLongitude () + "" ;/ / latitude 

System.out.println ("longitude" + latitude + "latitude" + longitude); 

/ / To get to the latitude and longitude information into SharedPreferences 
Editor editor = sp.edit (); 
editor.putString ("lastloaction", latitude + "-" + longitude); 
editor.commit (); 

} 

/ ** 
* When a location provider status changes 
* / 
public void onStatusChanged (String provider, int status, Bundle extras) {

} 


/ ** 
* When you open a device 
* / 
public void onProviderEnabled (String provider) {

} 


/ ** 
* A device is turned off 
* / 
public void onProviderDisabled (String provider) {

} 

} 
} 

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