Android Studio 0.4.2,Gradle版本很混乱

所以我刚刚更新到0.4.2,突然之间我收到了关于Gradle版本的错误.我通过在“Gradle SetTings”中选择“使用本地gradle分发”来解决错误所要求的问题.到目前为止,这些是我得到的消息：

You are using Gradle version 1.6,which is not supported. Please use version 1.9.
Please point to a supported Gradle version in the project's Gradle setTings or in the project's Gradle wrapper (if applicable.)

You are using Gradle version 1.8,which is not supported. Please use version 1.9.
Please point to a supported Gradle version in the project's Gradle setTings or in the project's Gradle wrapper (if applicable.)

Gradle version 1.6 is required. Current version is 1.9.
Please fix the project's Gradle setTings.

这些错误之间的交替取决于我切换到哪个版本,因此我不确定问题是什么.此外,我确实从gradle网站下载了1.8版本(-all),但我相信其他版本已经被Android studio下载了.

buildscript {
    repositories {
      mavenCentral()
    }
   dependencies {
      classpath 'com.android.tools.build:gradle:0.7.+'
   }
}