Creating Android .jar files

I want to create an Android project that contains some code, and then export that code as a .jar file to use开发者_JAVA百科 it on another Android project.

I've already tried to create an Android project and set it as a library in the properties, and then export the project as a jar file.

Aparently everything works fine, when I use my .jar file as a user library in another Android project my code inside the .jar is visible and everything compiles fine. But when I run my application it closes and say that it could not find the classes inside the .jar file.

Any sugestions will be very appreciated!

Thanks in advance.

Look at Project->Properties->Java Build Path->Order and Export. Make sure your jars are exported as well as imported.

Make sure your JAR is in the libs/ directory of the project using the JAR, and that it is in your build path in Eclipse.