android - Accessing GPS is not working. Application uses network to getting location -

my app doesnt want use gps , using network location instead. checked analysing latitude , longtitude, they're little bit random (like network location).

if use app using gps (e.g endomondo sports tracker) see characteristic mark, means, gps working:

when launch application, there's no mark @ all.

i'm using following code (code lars vogella, source: http://www.vogella.com/articles/androidlocationapi/article.html):

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; import android.widget.toast;  public class showlocationactivity extends activity implements locationlistener {   private textview latitutefield;   private textview longitudefield;   private locationmanager locationmanager;   private string provider;   /** called when activity first created. */    @override   public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     setcontentview(r.layout.main);     latitutefield = (textview) findviewbyid(r.id.textview02);     longitudefield = (textview) findviewbyid(r.id.textview04);      // location manager     locationmanager = (locationmanager) getsystemservice(context.location_service);     // define criteria how select locatioin provider -> use     // default     criteria criteria = new criteria();     provider = locationmanager.getbestprovider(criteria, false);     location location = locationmanager.getlastknownlocation(provider);      // initialize location fields     if (location != null) {       system.out.println("provider " + provider + " has been selected.");       onlocationchanged(location);     } else {       latitutefield.settext("location not available");       longitudefield.settext("location not available");     }   }    /* request updates @ startup */   @override   protected void onresume() {     super.onresume();     locationmanager.requestlocationupdates(provider, 400, 1, this);   }    /* remove locationlistener updates when activity paused */   @override   protected void onpause() {     super.onpause();     locationmanager.removeupdates(this);   }    @override   public void onlocationchanged(location location) {     int lat = (int) (location.getlatitude());     int lng = (int) (location.getlongitude());     latitutefield.settext(string.valueof(lat));     longitudefield.settext(string.valueof(lng));   }    @override   public void onstatuschanged(string provider, int status, bundle extras) {     // todo auto-generated method stub    }    @override   public void onproviderenabled(string provider) {     toast.maketext(this, "enabled new provider " + provider,         toast.length_short).show();    }    @override   public void onproviderdisabled(string provider) {     toast.maketext(this, "disabled provider " + provider,         toast.length_short).show();   } }  

of course added permissions in androidmanifest.xml file:

<uses-permission android:name="android.permission.access_coarse_location" /> <uses-permission android:name="android.permission.access_fine_location" /> <uses-permission android:name="android.permission.internet" /> 

any ideas?

solution: can use gps instead of selecting best provider deciding criteria.

example, replace:

locationmanager.requestlocationupdates(provider, 400, 1, this); 

with:

locationmanager.requestlocationupdates(locationmanager.gps_provider, 400, 1, this); 

explaination:

depending on application's use case, have choose specific location provider i.e. locationmanager.gps_provider or locationmanager.network_provider

alternatively, can provide input criteria such accuracy, power requirement, monetary cost, , on, , let android decide closest match location provider

    // retrieve list of location providers have fine accuracy, no monetary cost, etc criteria criteria = new criteria(); criteria.setaccuracy(criteria.accuracy_fine); criteria.setcostallowed(false); string providername = locmanager.getbestprovider(criteria, true); //and can make location update request selected best provider locationmanager.requestlocationupdates(provider, 400, 1, this);  

have @ how use locationmanager , how specify criteria , how getbestprovider method works reference