Your code doesn't seem to assign any values to redbtn and greenbtn. Then you call methods on these objects - perhaps they are still Null at that point?
-- Kostya Vasilyev -- http://kmansoft.wordpress.com 29.09.2010 0:34 пользователь "Gold" <thangadura...@gmail.com> написал: Hi..All, I need to disply current Position latitude and logintude .. I tried but it will show Null pointer exception.. here with i attached my code... please help me to solve this problem.. I run this application on android emulator import android.app.Activity; import android.app.Dialog; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.location.LocationProvider; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.Toast; public class Home extends Activity { private Button btn1; private Button btn2; private Button btn3; private LocationListener myLocationListener; private LocationManager myLocationManager; public String latitude; public String longitude; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.home); myLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); myLocationListener = new MyLocationListener(); myLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1, 1, myLocationListener); latitude=String.valueOf(myLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLatitude()); longitude = String.valueOf(myLocationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER).getLongitude()); btn1= (Button)findViewById(R.id.btn1); btn2= (Button)findViewById(R.id.btn2); btn3= (Button)findViewById(R.id.btn3); redbtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(getBaseContext(), "Latitude :" + latitude.toString(), Toast.LENGTH_SHORT).show(); } }); greenBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(getBaseContext(), "Longitude:" + longitude.toString(), Toast.LENGTH_SHORT).show(); } }); cancelBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Toast.makeText(Home.this, "NO gps", Toast.LENGTH_SHORT).show(); } }); } public class MyLocationListener implements LocationListener { public void onLocationChanged(Location argLocation) { if(argLocation != null) { latitude = String.valueOf(argLocation.getLatitude()); longitude = String.valueOf(argLocation.getLongitude()); } } public void onProviderDisabled(String provider) { } public void onProviderEnabled(String provider) { } public void onStatusChanged(String provider, int status, Bundle arg2) { } }; } Thanks & Warm Regards, gold -- 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<android-developers%2bunsubscr...@googlegroups.com> For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- 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
