java - How can I get the longitude and latitude in my android app? -

i've been trying location particular phone while now. have used following code instead of showing location crash when try , run app in emulator.

once i've got longitude , latitude going use map current location on google map!

public class homescreen extends actionbaractivity implements locationlistener {     final textview t = (textview)findviewbyid(r.id.textview1);     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_homescreen);          locationmanager locationmanager = (locationmanager) getsystemservice(context.location_service);         locationmanager.requestlocationupdates(locationmanager.gps_provider, 0, 0, this);      }      @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.         getmenuinflater().inflate(r.menu.homescreen, menu);         return true;     }      @override     public boolean onoptionsitemselected(menuitem item) {         // handle action bar item clicks here. action bar         // automatically handle clicks on home/up button, long         // specify parent activity in androidmanifest.xml.         int id = item.getitemid();         if (id == r.id.action_settings) {             return true;         }         return super.onoptionsitemselected(item);     }      @override     public void onlocationchanged(location location) {         // todo auto-generated method stub         int latitude = (int) (location.getlatitude());         int longitude = (int) (location.getlongitude());         t.settext(latitude);  //      log.i("geo_location", "latitude: " + latitude + ", longitude: " + longitude);      } 

try class..

public class mainactivity extends service implements locationlistener {  .....          // minimum distance change updates in meters         private static final long min_distance_change_for_updates = 10; // 10 meters          // minimum time between updates in milliseconds         private static final long min_time_bw_updates = 1000 * 60 * 1; // 1 minute          location location; // location          double latitude; // latitude         double longitude; // longitude          public location getlocation() {             try {                 locationmanager locationmanager = (locationmanager).getaplicationcontext()                         .getsystemservice(location_service);                  // getting gps status                  boolean isgpsenabled = locationmanager                         .isproviderenabled(locationmanager.gps_provider);                  // getting network status                 boolean isnetworkenabled = locationmanager                         .isproviderenabled(locationmanager.network_provider);                  if (!isgpsenabled && !isnetworkenabled) {                     // no network provider enabled                 } else {                     // first location network provider                     if (isnetworkenabled) {                         locationmanager.requestlocationupdates(                                 locationmanager.network_provider,                                 min_time_bw_updates,                                 min_distance_change_for_updates, this);                         log.d("network", "network");                         if (locationmanager != null) {                             location = locationmanager                                     .getlastknownlocation(locationmanager.network_provider);                             if (location != null) {                                 latitude = location.getlatitude();                                 longitude = location.getlongitude();                             }                         }                     }                     // if gps enabled lat/long using gps services                     if (isgpsenabled) {                         if (location == null) {                             locationmanager.requestlocationupdates(                                     locationmanager.gps_provider,                                     min_time_bw_updates,                                     min_distance_change_for_updates, this);                             log.d("gps enabled", "gps enabled");                             if (locationmanager != null) {                                 location = locationmanager                                         .getlastknownlocation(locationmanager.gps_provider);                                 if (location != null) {                                     latitude = location.getlatitude();                                     longitude = location.getlongitude();                                 }                             }                         }                     }                 }              } catch (exception e) {                 e.printstacktrace();             }              return location;         } 

the double values latitude longitude returns lon,lat