将jar导入android应用

Question

I am trying to import a jar file into an android app that I'm working on, but when I try to declare the import statement in my java code for the app, I get "cannot resolve symbol error".

The jar doesn't have a main method as it is just a class that hashes user passwords and stores the hash in a DB, among a few other things. Here's a screen shot of the situation.

I ran "sync project with gradle files" as well. I'm sure it is something simple. Here's a link to some pics regarding my issue.

Error in importing, says package doesn't exist:

Answer 1

You should add the jar to the compile list too:

compile files('libs/Security.jar')

Hope it works.

Answer 2

在Android Studio中尝试“ File ->“使Invalidate Caches / Restart...然后选择“ Invalidate and Restart 。