failed for task ':app:clean'. > Unable to delete file:

在使用Android studio Clean Project 过程中爆了下面这个错误

Error:Execution failed for task ':app:clean'.> Unable to delete file: D:\demo\warehousekeeper-01139949\app\build\intermediates\exploded-aar\com.android.databinding\adapters\1.2.1\jars\classes.jar

上Stack Overflow查找解决方案，这个错误是build文件太过顽强在clean的时候删除不了，
解决方案
- 关掉Android studio然后找到相应的目录删除掉报错不能删除的文件
- 在Model 的build.gradle中加上

task clean(type: Exec) {    ext.lockhunter = '\"C:\\LockHunter.exe\"'    def buildDir = file(new File("build"))    commandLine 'cmd', "$lockhunter", '/delete', '/silent', buildDir} 

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