java.lang.NullPointerException GoogleMaps V2

Question

i just learning about android programming to show map. but when i run this code ,there\'s some error. Can anybody explain why this error occurs? And what I can do to fix this pr

Answer 1

In your xml file change this class="com.google.android.gms.maps.MapFragment" to android:name="com.google.android.gms.maps.SupportMapFragment"

Extend your activity to FragmentActivty and change

map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
        .getMap(); to   
map= ((SupportMapFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.map)).getMap();

Also check

if (map== null) 
            {
          map= ((SupportMapFragment) getSupportFragmentManager()
                    .findFragmentById(R.id.map)).getMap();}

Hope this helps.