the map view didn't show in my program?

I follow the procedure of hellogooglemap example and it was working nicely but i don't kn开发者_StackOverflowow now with my galaxy s9000 didn't show the map only. i didn't know why it happened. is there any updating for

android:versionCode="1"
android:versionName="1.0"

in manifest file or what?

---

Make sure you have the correct google maps API key defined. The key should correspond to the certificate you have used to sign the application. As a check make sure that internet connectivity to the phone is good as without internet the map wont load.