把android studio的api换成17要怎么改？

怎么改~求大神啊，自己改了n遍了…报错

http://stackoverflow.com/questions/16748273/android-gradle-how-to-build-for-android-google-apis-4-2-2-not-for-android-4-2-2

 android {
    ...
    compileSdkVersion 17
    ...
}

改为

 android {
    ...
    compileSdkVersion "Google Inc.:Google APIs:17"
    ...
}

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