Android Studio. Can't include external library properly

Question

I\'m trying to add to classpath external library (this one). The way I do it: File -> Project Structure -> Dependencies tab -> Add file dependency. Is

Answer 1

I fixed it by using exclude option in app/build.gradle, it works fine now.

dependencies {
    .....
    compile ('com.thoughtworks.xstream:xstream:1.4.7'){
        exclude group: 'xmlpull'
    }
}