Could not get unknown property 'ANDROID_BUILD_SDK_VERSION'

Error:(7, 0) Could not get unknown property ‘ANDROID_BUILD_SDK_VERSION’ for project ‘:InitActivity’

build.gradle如下

apply plugin: 'com.android.library'

dependencies {
}

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

defaultConfig {
minSdkVersion Integer.parseInt(project.ANDROID_BUILD_MIN_SDK_VERSION)
targetSdkVersion Integer.parseInt(project.ANDROID_BUILD_TARGET_SDK_VERSION)
}
sourceSets {
main {
manifest.srcFile 'AndroidManifest.xml'
java.srcDirs = ['src']
jniLibs.srcDirs = ['libs']
aidl.srcDirs = ['src']
renderscript.srcDirs = ['src']
res.srcDirs = ['res']
}
}
}

解决方法

方法1：在工程的根目录下，创建gradle.properties文件

ANDROID_BUILD_TARGET_SDK_VERSION=25
ANDROID_BUILD_TOOLS_VERSION=25.0.0
ANDROID_BUILD_SDK_VERSION=25
ANDROID_BUILD_MIN_SDK_VERSION=14

方法2：Android Studio

方法3

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)
}

android {
compileSdkVersion 19
buildToolsVersion '19.1.0'

defaultConfig {
minSdkVersion 15
targetSdkVersion 19
}