如何更新com.android.application插件？

我收到这条消息：

Plugin is too old,please update to a more recent version,or set ANDROID_DAILY_OVERRIDE environment variable to
"a9d6c794295e89d95704157e2ed8fd55ffd2765c"

和：

C:\path\mobile\build.gradle
Error:(1) A problem occurred evaluating project ':mobile'.
Failed to apply plugin [id 'com.android.application']
Could not create plugin of type 'AppPlugin'.

top build.gradel文件：

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.3.0-beta1'
        classpath 'com.google.gms:google-services:1.3.0-beta1'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

基本上,我不知道如何更新该com.android.application插件.

解决方法

显然,Gradle for Android插件的测试版将过期. AFAIK,这是没有记录的行为.现在,我知道的唯一方法就是通过监控 http://tools.android.com/tech-docs/new-build-system来了解最新的测试版本.它实际上显示了beta3;我原以为最新的是beta2.