1.导入项目遇到

Error:(9, 1) A problem occurred evaluating project ':*'.

> Cannot get property 'compileSdkVersion' on extra properties extension as it does not exist

2.查看报错的配置文件

android {
    compileSdkVersion rootProject.ext.compileSdkVersion
    buildToolsVersion rootProject.ext.buildToolsVersion

3.很明显在根项目的build.gradle中添加配置。

ext{
    compileSdkVersion 25
    buildToolsVersion "25.0.2"
}

4.这回又报错了

Error:(24, 1) A problem occurred evaluating root project '*'.
> Could not find method compileSdkVersion() for arguments [25] on root project '*' of type org.gradle.api.Project.

5.网上说要写成这样

ext{
    compileSdkVersion=25
    buildToolsVersion="25.0.2"
}

6.Rebuild下可以了

Information:BUILD SUCCESSFUL
Information:Total time: 7.747 secs
Information:0 errors
Information:0 warnings
Information:See complete output in console

7.完了之后，发现在工程列表中没看到导入的项目，点击下同步就可以看到了。