Cannot Determine Location In Android -

i trying create android showing user's location in map-view.but when run app says "can't determinate location" .i in stuck .can me code or link guide on how implement correctly?

here code:

public class mymaplocationactivity extends mapactivity {  private mapview mapview; private mylocationoverlay mylocationoverlay;  /** called when activity first created. */ @override public void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);      // main.xml contains mapview     setcontentview(r.layout.main);       // extract mapview layout     mapview = (mapview) findviewbyid(r.id.mapview);     mapview.setbuiltinzoomcontrols(true);      // create overlay shows our current location     mylocationoverlay = new fixedmylocationoverlay(this, mapview);      // add overlay mapview , refresh     mapview.getoverlays().add(mylocationoverlay);     mapview.postinvalidate();      // call convenience method zooms map on our location     zoomtomylocation(); }  @override protected void onresume() {     super.onresume();     // when our activity resumes, want register location updates     mylocationoverlay.enablemylocation(); }  @override protected void onpause() {     super.onpause();     // when our activity pauses, want remove listening location updates     mylocationoverlay.disablemylocation(); }  /**  * method zooms user's location zoom level of 10.  */ private void zoomtomylocation() {     geopoint mylocationgeopoint = mylocationoverlay.getmylocation();     if(mylocationgeopoint != null) {         mapview.getcontroller().animateto(mylocationgeopoint);         mapview.getcontroller().setzoom(10);     }     else {         toast.maketext(this, "cannot determine location", toast.length_short).show();     } }  @override protected boolean isroutedisplayed() {     return false; }}  

fixedmylocationoverlay.java

public class fixedmylocationoverlay extends mylocationoverlay {  private boolean bugged = false;  private drawable drawable; private paint accuracypaint; private point center; private point left; private int width; private int height;  public fixedmylocationoverlay(context context, mapview mapview) {     super(context, mapview); }  @override protected void drawmylocation(canvas canvas, mapview mapview,         location lastfix, geopoint mylocation, long when) {     if(!bugged) {         try {             super.drawmylocation(canvas, mapview, lastfix, mylocation, when);         } catch (exception e) {             // found buggy phone, draw location icons ourselves             bugged = true;         }     }      if(bugged) {         if(drawable == null) {              accuracypaint = new paint();             accuracypaint.setantialias(true);             accuracypaint.setstrokewidth(2.0f);              drawable = mapview.getcontext().getresources().getdrawable(r.drawable.ic_maps_indicator_current_position);             width = drawable.getintrinsicwidth();             height = drawable.getintrinsicheight();             center = new point();             left = new point();         }          projection projection = mapview.getprojection();         double latitude = lastfix.getlatitude();         double longitude = lastfix.getlongitude();         float accuracy = lastfix.getaccuracy();          float[] result = new float[1];          location.distancebetween(latitude, longitude, latitude, longitude + 1, result);         float longitudelinedistance = result[0];          geopoint leftgeo = new geopoint((int)(latitude*1e6), (int)((longitude-accuracy/longitudelinedistance)*1e6));         projection.topixels(leftgeo, left);         projection.topixels(mylocation, center);         int radius = center.x - left.x;          accuracypaint.setcolor(0xff6666ff);         accuracypaint.setstyle(style.stroke);         canvas.drawcircle(center.x, center.y, radius, accuracypaint);          accuracypaint.setcolor(0x186666ff);         accuracypaint.setstyle(style.fill);         canvas.drawcircle(center.x, center.y, radius, accuracypaint);          drawable.setbounds(center.x - width/2, center.y - height/2, center.x + width/2, center.y + height/2);         drawable.draw(canvas);     } }} 

in manifest file add below this:

<uses-permission android:name="android.permission.access_network_state" /> <uses-permission android:name="android.permission.internet" /> <uses-permission android:name="com.google.android.providers.gsf.permission.read_gservices" /> <uses-permission android:name="android.permission.write_external_storage" />  <!-- required show current location --> <uses-permission android:name="android.permission.access_coarse_location" /> <uses-permission android:name="android.permission.access_fine_location" /> 

below link useful, worked me:

http://ramsandroid4all.blogspot.in/2013/06/google-maps-android-api-v2-showing.html

the above link explains 2 things,

1. how implement google map version 2 in android.
2. how implement location listener determine user location.

the overall code shows how current location using network_provider , display marker on google map. device need have google map installed , internet connection run properly. below code important part determine user location when changes position:

@override  public void onlocationchanged(location location) {     map.clear();     markeroptions mp = new markeroptions();     mp.position(new latlng(location.getlatitude(), location.getlongitude()));     mp.title("my position");     map.addmarker(mp);     map.animatecamera(cameraupdatefactory.newlatlngzoom(     new latlng(location.getlatitude(), location.getlongitude()), 16));    }