Error when trying to access Overlay text

hwrdprkns · by **hwrdprkns** » Wed Mar 24, 2010 6:38 pm

Hi guys,

I'm getting a NullPointerException when I am trying to access the overlay text in on my AVD. It displays the overlay fine, but when I click on it, the program starts force closing.

Here is the onTap method where I tell it what to do when I click on the overlay:

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@Override
 
        protected boolean onTap(int index)
 
        {
 
                OverlayItem item = mOverlays.get(index);
 
                AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
 
                dialog.setTitle(item.getTitle());
 
                dialog.setMessage(item.getSnippet());
 
                dialog.show();
 
                return true;
 
        }
 
Parsed in 0.030 seconds,  using GeSHi 1.0.8.4

Here is where I first call it in my main activity:

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 //Add the overlay to the specified GeoPoint
 
           GeoPoint point = new GeoPoint ((int)(lat*1E6), (int) (lng*1E6));
 
           OverlayItem overlayitem = new OverlayItem(point,"Hello world","Ohai, this is where I am");
 
           itemizedoverlay.addOverlay(overlayitem);
 
           mapOverlays.add(itemizedoverlay);
Parsed in 0.031 seconds,  using GeSHi 1.0.8.4

Any ideas would be greatly appreciated! Thanks again!

Here are the pastebins for the full code:

Main Acivity

ItimizedOverlay class

prodeveloper · by **prodeveloper** » Sun Apr 11, 2010 1:57 am

Hey, I've been having the same problem, so if anyone has found a solution, please tell. Thanks.

ethan.close · by **ethan.close** » Mon Apr 19, 2010 6:33 am

Here's a link that will show you how to fix it. The tutorial currently has errors. :cry:

http://osdir.com/ml/Android-Beginners/2 ... 00222.html

Basically,

In HelloGoogleMaps.java, add "this" in the itemized overlay declaration:

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HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(drawable,this);
Parsed in 0.036 seconds,  using GeSHi 1.0.8.4

In HelloItemizedOverlay.java add the boundCinterBottom method on default marker:

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public HelloItemizedOverlay(Drawable defaultMarker, Context context)
 
{
 
   super(boundCenterBottom(defaultMarker));
 
   mContext = context;
 
}
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

~ Ethan

prodeveloper · by **prodeveloper** » Wed Apr 21, 2010 1:56 am

It worked! Thank you so much!

Error when trying to access Overlay text

Error when trying to access Overlay text

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