How to add jar files in class path in Android Studio

step -1-

Keep all the jar files in the libs folder of the projects

File -- > Project Structure

or

Ctr + Alt + Shift + S

Step -2-
Go to dependencies Tab

Step -3
click on '+' insert and click on file dependencies and select the files which we want to add in class path

Step-4 Finally see you will be able to see follwing lines added in

build.gradle
compile files('libs/ksoap2-android-assembly-2.5.8-jar-with-dependencies.jar')