在 Android Studio 中导入 Facebook 库：找不到属性“ANDROID_BUILD_SDK_VERSION”

我想将库项目导入到我的应用程序中，但每当我尝试这样做时，Android Studio 都无法识别它

它还在 build.gradle 中给了我错误..

该库是：PagerSlidingTabStrip ....

以下是一些图片：

到目前为止我已经尝试了三天了！！ 请帮我 ：）

EDIT:

apply plugin: 'android-library'

dependencies {
compile 'com.android.support:support-v4:19.0.0'
}

android {
compileSdkVersion Integer.parseInt(project.ANDROID_BUILD_SDK_VERSION)
buildToolsVersion project.ANDROID_BUILD_TOOLS_VERSION

defaultConfig {
    minSdkVersion 8
    targetSdkVersion Integer.parseInt(project.ANDROID_BUILD_TARGET_SDK_VERSION)
}

sourceSets {
    main {
        manifest.srcFile 'AndroidManifest.xml'
        java.srcDirs = ['src']
        res.srcDirs = ['res']
    }
}
}

 apply from: 'https://raw.github.com/chrisbanes/gradle-mvn-push/master/gradle-mvn-push.gradle'

EDIT2 :

FAILURE: Build failed with an exception.

* What went wrong:
A problem occurred configuring project ':Sahertoday'.
> Could not resolve all dependencies for configuration ':Sahertoday:_debugCompile'.
> Could not find com.astuetz:pagerslidingtabstrip:1.0.1.
 Required by:
     Saher-3:Sahertoday:unspecified

* Try:
 Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get         more log output.

 BUILD FAILED

首先，您可以将此依赖项添加到您的项目中，而无需在本地编译 lib。

dependencies {
    compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
}

否则，如果您想在本地编译此库，则必须在根目录中的 gradle.properties 中定义这些键。

ANDROID_BUILD_TARGET_SDK_VERSION=19
ANDROID_BUILD_TOOLS_VERSION=19
ANDROID_BUILD_SDK_VERSION=19