I'm building an Android app which uses a library that is defined in another Eclipse project (same workspace). All is working fine, but now I added a jar file to the library project's build path. In Eclipse I exported the jar file to make it visible to dependent projects of the library (Build Path -> Order and Export -> mark the jar file). Still Eclipse (ADT) complains that the import cannot be resolved. I have set up a test project for the library as well, and there the imports are visible after exporting the jar file as mentioned above. Is there anything I forgot to configure?
Regards, Martin
ADT doesn't seem to pick it up automatically :-/
Manually configuring the main project's build path to rely on the library project's jars worked for me.
Build Path -> Libraries -> Add JARs -> {Library Project}\libs\myjar.jar
来源：https://stackoverflow.com/questions/5790370/jar-from-library-project-not-resolved-in-android-app