HelloMapView in android

I am trying to write a mapView application .When I 开发者_JAVA技巧extend my class with MapActvity it will generate an error force to close application. And in log chat I got an run-time error like classNotFoundException.

please solve my problem.

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It's hard to point out the error without knowing what you've done so far, but at the very least you must add the library to your manifest:

<uses-library android:name="com.google.android.maps" />

You should also go into Window > Android SDK and AVD Manager in Eclipse and make sure the device your running is targeting Google APIs (Google Inc.) rather than Android x.x