If you are doing in eclipse, then you can go to ProjectName -> Right click on it -> Goto Properties
-> Goto Java Build Path
-> Go to Library
-> Choose Add Jars
option if jar is in same project or choose Add External JARs
if jar is outside the project folder.
If you have already copied the JAR
file to libs/
directory of your project then choose the option of Add JARs
and browse to the libs
folder where you've copied the jar. Select it and press okay. It should get included in your project. Hope this helps else please comment.