Error:Execution failed for task ':app:clean'. > Unable to delete directory: D:\testDlaner\MyNDKDemo\

Error:Execution failed for task ':app:clean'.
> Unable to delete directory: D:\testDlaner\MyNDKDemo\app\build\intermediates\classes\debug

NDK开发中clean project时，屡试不爽，这个Error困扰我很久。尽管可以运行程序，但是不能clean，很让人恼火

在Module:app的build.gradle中加了一个task，

task clean(type: Delete) {
delete rootProject.buildDir
}

终于可以clean了。