Thanks guys! I could figure that out! It was only with the help of you people, that I could get a clear understanding about getting coordinates from GPS! Thanks again!
God Bless! On May 5, 4:10 pm, "Tommy" <droi...@gmail.com> wrote: > You are getting the null pointer b/c getLastKnownLocation has nothing to > give... In this case you would need to call up the GPS listener... When it > gets the current fix it will pop off its subroutine.. Inside there you can > get the lat/lon do what you need to do with your button click then kill the > GPS listener.. > > > > -----Original Message----- > From: android-developers@googlegroups.com > > [mailto:android-developers@googlegroups.com] On Behalf Of Mark Murphy > Sent: Thursday, May 05, 2011 3:29 PM > To: android-developers@googlegroups.com > Subject: Re: [android-developers] Re: Android app crashes when invoking > getSystemService(LOCATION_SERVICE) > > requestLocationUpdates() is asynchronous. It may take seconds or more for > the location to be determined, depending on the location provider being used > and the user's circumstances (e.g., is the user getting a GPS signal?). You > cannot simply call getLastKnownLocation() immediately after calling > requestLocationUpdates() and expect to get any value. > > Your whole premise (press a button, get a location) will only work if > either: > > 1. You have location updates started early (e.g., onResume()), so by the > time the user presses the button, you probably have a fix, or > > 2. Pressing the button triggers the request for the location, and it simply > does not have an immediate effect, until the fix arrives > > On Thu, May 5, 2011 at 3:23 PM, Prayag Pathak <prayag.d.pat...@gmail.com> > wrote: > > Hi Mark, > > > Thanks for the answer. But still its not working. I included the code > > segment that updates the code. But still not working. > > Following is the code : > > > LocationManager lm = (LocationManager) > > getSystemService(Context.LOCATION_SERVICE); > > LocationListener ll = new mylocationlistener(); > > lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, > > ll); > > Location l = > > lm.getLastKnownLocation(lm.getProvider(LOCATION_SERVICE).getName()); > > Log.w("LocationTracker", "The value of Location returned by > > getLastKnownLocation() is : " + l.toString()); > > Log.d("Current Location", l.getLatitude() + ""); > > Log.d("Current Location",l.getLongitude() + ""); > > Toast.makeText(this, l.getLatitude() + "" + > > l.getLongitude(),Toast.LENGTH_LONG).show(); > > > Regards, > > > Prayag > > > On May 5, 2:20 pm, Prayag Pathak <prayag.d.pat...@gmail.com> wrote: > >> Hi guys, > > >> I am trying to get the latitude and longitude of the current location. > >> Let me clarify, I dont want to implement a listener that will create > >> an event when the location will be changed. I am trying to create an > >> app that will record the current location on a button click event. > >> Following is my code : > > >> hdLocMgr = (LocationManager) > >> getSystemService(Context.LOCATION_SERVICE); > >> Log.w("LocationTracker", "The Location Manager is : > >> "+hdLocMgr.toString()); > >> hdLocProvider = hdLocMgr.getBestProvider(hdCrit, true); location = > >> hdLocMgr.getLastKnownLocation(hdLocProvider); > >> dlat = location.getLatitude(); > >> dlon = location.getLongitude(); > >> Log.w("LocationTracker", "The value of Latitude is : > >> "+dlat.toString()); > > >> The code gives a RunTimeException (caused by NullPointerException as > >> stated in it). > > >> Kindly help me out in that. > > >> Regards, > > >> Prayag > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to > > android-developers@googlegroups.com > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com > > For more options, visit this group at > >http://groups.google.com/group/android-developers?hl=en > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy > > _Android Programming Tutorials_ Version 3.4 Available! > > -- > You received this message because you are subscribed to the Google Groups > "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group > athttp://groups.google.com/group/android-developers?hl=en- Hide quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
