[android-developers] Adding library to Eclipse project

I'm clearly missing something simple, but after nearly an hour of
trying to figure it out, I'm still stuck.

I have an external jar file containing classes I want to use in my
project. No problem, right? I just followed the instructions at

http://developer.android.com/guide/appendix/faq/commontasks.html#addexternallibrary

That is, I used the Properties->Java Build Path->Libraries panel to
add the jar to my project as a library. But it doesn't work. The
external library is being included in the compilation classpath, so
everything compiles correctly, but the external classes aren't
actually getting included in the apk. When I try to run my app, it
immediately crashes with a java.lang.NoClassDefFoundError. And
looking at the apk, I see it's only 20K, whereas the external library
jar is over 200K.

What am I doing wrong?

Peter

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