[android-developers] Re: ReverseGeocoding NullPointerException

You need to use the variable "location" passed into onLocationChanged.  Right now, you're ignoring it.

On Thursday, August 9, 2012 7:13:16 AM UTC-5, Ece Osmanağaoğlu wrote:

I added LocationListener, unfortunately still doesn't work.

    locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    gpsProv = locMan.GPS_PROVIDER;
    locMan.requestLocationUpdates(gpsProv, 0, 0, locList);
   
    okullar.setOnItemClickListener(new OnItemClickListener()
    {
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
        {
            AlertDialog.Builder alert = new AlertDialog.Builder(Kampusler.this);
            switch (arg2)
            {
            case 0:
                alert.setTitle("- Konumunuz -").setMessage(Lokasyonum()).setPositiveButton("Tamam", null).show();
                break;
               
            case 1:
                alert.setTitle("- Konumunuz -").setMessage(Lokasyonum()).setPositiveButton("Tamam", null).show()
                break;
            default:
                break;
            }
        }
    });
    }
    private String Lokasyonum()
    {
        loc = locMan.getLastKnownLocation(gpsProv);
        if(loc != null)
            MyLocation();
        else
            Toast.makeText(getApplicationContext(), "Can't Find...", Toast.LENGTH_SHORT).show();
   
    return sonuc;
    }

    private String MyLocation()
    {   
        Geocoder myGeo = new Geocoder(Kampusler.this);
        try
        {
            List<Address> adres = myGeo.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1);
            if(adres != null)
            {
                for(int i=0; i<adres.get(0).getMaxAddressLineIndex(); i++)
                {
                    sonuc = adres.get(0).getAddressLine(i) + "\n";           
                }
            }           
            else
                Toast.makeText(getApplicationContext(), "Can't Find Address...", Toast.LENGTH_SHORT).show();
        }
        catch (Exception e)
        {
        e.printStackTrace();
        Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
        }
       
    return sonuc;
    }

public class MyLocList implements LocationListener
        {
            public void onLocationChanged(Location location)
            {
                MyLocation();
            }
            public void onProviderDisabled(String provider)
            {}
            public void onProviderEnabled(String provider)
            {}
            public void onStatusChanged(String provider, int status, Bundle extras)
            {}
        }
}
On Wednesday, August 8, 2012 3:13:26 PM UTC+3, Ece Osmanağaoğlu wrote:

I wanna get current location.
There is null pointer exception in List<Address>

        locMan = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);

        gpsProv = LocationManager.GPS_PROVIDER;
        locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 250, Kampusler.this);
        myGeo = new Geocoder(Kampusler.this, Locale.getDefault());
       
        loc = locMan.getLastKnownLocation(gpsProv);       
        try
        {
            List<Address> adres = myGeo.getFromLocation(loc.getLatitude(), loc.getLongitude(), 1);
                if(adres != null)
                {
                    for(int i=0; i < adres.get(0).getMaxAddressLineIndex(); i++)
                    { 
                        result += adres.get(0).getAddressLine(i) + "\n";
                    }      
                }
                else
                {
                    Toast.makeText(Kampusler.this, "Don't get address...", Toast.LENGTH_LONG).show();
                }
        }
        catch (Exception e)
        {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(), e.getMessage(), Toast.LENGTH_SHORT).show();
        }

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