No signature of method (or how to add a third-party library) in Android Studio -

i have android studio 0.5.8. here build.gradle file:

buildscript {     repositories {         mavencentral()     }     dependencies {         classpath 'com.android.tools.build:gradle:0.9.+'      }  }  allprojects {     repositories {         mavencentral()     }    dependencies {     compile files('libs/scala-compiler.jar', 'libs/scala-library.jar', 'libs/scala-reflect.jar')   } } 

i added libs manually because right-mouse-click on *.jar didn't cause add line compile files. i'm getting error now:

error: no signature of method: org.gradle.api.internal.artifacts.dsl.dependencies.defaultdependencyhandler.compile() applicable argument types: (org.gradle.api.internal.file.collections.defaultconfigurablefilecollection) values: [file collection] possible solutions: module(java.lang.object) 

how solve it?

remove dependencies block build file posted in question. instead, add library dependencies project structure dialog. in dialog, choose module want add dependencies for, select dependencies tab, click + button, , choose "file dependency":

having said that, if you've started project in last few months on approaching recent version of android studio, should automatically picking libraries in libs directory inside module, via line:

{dir=libs, include=[*.jar]}

if line present , it's not seeing libraries, perhaps you've put them in wrong folder -- there's libs directory inside module should go. may have click "sync project gradle files" button in toolbar pick them up.