android - Error "COMPILE_SDK_VERSION" not found when adding a GPUImage Library to the Project -

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previously worked on eclipse android development, have moved android studio specific project , wanted hang of android studio.

i created new project. , imported new module add library "gpuimage" "project explorer". library got added, when compiled project, got

error : "error:(4, 0) not find property 'compile_sdk_version' on com.android.build.gradle.libraryextension_decorated@171c6271."

tried follow tutorials haven't been able find thing. must related editing gradle files of app or library not sure. need help. thanks!

if import module, should download released version: https://github.com/cyberagent/android-gpuimage/releases in opinion, add gradle better

repositories {     mavencentral() }  dependencies {     compile 'jp.co.cyberagent.android.gpuimage:gpuimage-library:1.3.0' }

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