android - geo location using GPS -
i using below code getting geo-location using gps when net not available.but location not updated.it give same longitude , latitude different location ...it not update value of longitude , latitude..i want accurate value of longitude , latitude each place.
gpstracker .java
public class gpstracker extends service implements locationlistener { private final context mcontext; // flag gps status boolean isgpsenabled = false; // flag network status boolean isnetworkenabled = false; // flag gps status boolean cangetlocation = false; location location; // location double latitude; // latitude double longitude; // longitude // minimum distance change updates in meters private static final long min_distance_change_for_updates = 1; // 1 meters // minimum time between updates in milliseconds private static final long min_time_bw_updates = 1000; // 1 second // declaring location manager protected locationmanager locationmanager; public gpstracker(context context) { this.mcontext = context; getlocation(); } public location getlocation() { try { locationmanager = (locationmanager) mcontext .getsystemservice(location_service); // getting gps status isgpsenabled = locationmanager .isproviderenabled(locationmanager.gps_provider); // getting network status isnetworkenabled = locationmanager .isproviderenabled(locationmanager.network_provider); if (!isgpsenabled && !isnetworkenabled) { // no network provider enabled } else { this.cangetlocation = true; // 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; } /** * stop using gps listener calling function stop using gps in * app * */ public void stopusinggps() { if (locationmanager != null) { locationmanager.removeupdates(gpstracker.this); } } /** * function latitude * */ public double getlatitude() { if (location != null) { latitude = location.getlatitude(); } // return latitude return latitude; } /** * function longitude * */ public double getlongitude() { if (location != null) { longitude = location.getlongitude(); } // return longitude return longitude; } /** * function check gps/wifi enabled * * @return boolean * */ public boolean cangetlocation() { return this.cangetlocation; } /** * function show settings alert dialog on pressing settings button * lauch settings options * */ public void showsettingsalert() { alertdialog.builder alertdialog = new alertdialog.builder(mcontext); // setting dialog title alertdialog.settitle("gps settings"); // setting dialog message alertdialog .setmessage("gps not enabled. want go settings menu?"); // on pressing settings button alertdialog.setpositivebutton("settings", new dialoginterface.onclicklistener() { public void onclick(dialoginterface dialog, int which) { intent intent = new intent( settings.action_location_source_settings); mcontext.startactivity(intent); } }); // on pressing cancel button alertdialog.setnegativebutton("cancel", new dialoginterface.onclicklistener() { public void onclick(dialoginterface dialog, int which) { dialog.cancel(); } }); // showing alert message alertdialog.show(); } @override public void onlocationchanged(location location) { } @override public void onproviderdisabled(string provider) { } @override public void onproviderenabled(string provider) { } @override public void onstatuschanged(string provider, int status, bundle extras) { } @override public ibinder onbind(intent arg0) { return null; } }
mainactivity.java
if (gps.cangetlocation()) { double latitude = gps.getlatitude(); double longitude = gps.getlongitude(); // \n new line toast.maketext( getapplicationcontext(), "your location - \nlat: " + latitude + "\nlong: " + longitude, toast.length_long) .show(); } else { // can't location // gps or network not enabled // ask user enable gps/network in settings gps.showsettingsalert(); }
you have empty method onlocationchanged(). should proceed obtained location in body, like:
@override public void onlocationchanged(location location) { this.location = location; }
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