今天使用Android Studio 2.0打开我之前的项目时，编译报了如下错误：
Error:Cause: com/android/build/gradle/internal/model/DefaultAndroidProject : Unsupported major.minor version 52.0
其中build.gradle文件内容如下所示：
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.2.0-alpha4'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}如上所示，gradle的版本为2.2.0-alpha4。这是因为今天下了一个Android Studio 2.2 Preview4,然后将该项目在Android Studio 2.2 Preview4中打开过,原来的gradle版本是2.0.0
解决办法
方法1
直接不用Android Studio 2.0了，转而使用Android Studio 2.2 Preview4编译该项目，继续开发。
方法2
在Android Studio 2.0中继续开发该项目，修改build.gradle文件内容，将gradle版本改成2.0.0，代码如下：
// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
repositories {
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:2.0.0'
// NOTE: Do not place your application dependencies here; they belong
// in the individual module build.gradle files
}
}
allprojects {
repositories {
jcenter()
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}原文：http://blog.csdn.net/ouyang_peng/article/details/51799001
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