Question

I made an application which displays me the map by taking GPS lat and long. Now when I run that application on my mobile or emulator it works fine. But when I sign the application and install that apk on some other mobile it does not display the Map. It just show me the overlay Item.

Friends I’m stuffed please help

I have MapsActivity Class and Overlay Item Class and I took help from here:
http://developer.android.com/resources/tutorials/views/hello-mapview.html

Answer 1

On the page you link to, there are two important points you should consider:

This tutorial requires that you have
the external Google Maps library
installed in your SDK environment.

For the purpose of this tutorial, you
should register with the SDK debug
certificate, which will only be valid
while your application is signed with
the debug key (once you sign with your
private key, you will need a new API
key)

Now, while the first talks about the SDK environment, it’s also likely that you should ensure the Google APIs are present on the target device. I’ll admit that this is likely to already be the case however.

What I think is more likely to be the problem is the second point – Once you sign the APK with your release key, you need a different Google maps API key. This, I suspect, is the problem.