Importing Facebook library in Android Studio: Could not find property 'ANDROID_BUILD_SDK_VERSION'
问题 I want to import a library project into my app but whenever I try to do so , Android Studio doesn't recognise it It also gives me errors in build.gradle .. The Library is : PagerSlidingTabStrip .... Here are some pictures : I have been trying to make it work for 3 days so far !! Please Help Me :) EDIT: apply plugin: 'android-library' dependencies { compile 'com.android.support:support-v4:19.0.0' } android { compileSdkVersion Integer.parseInt(project.ANDROID_BUILD_SDK_VERSION)