Android studio：build报错java.io.IOException: Could not delete path……

首先Build-Clean project

　　　　发现报错：Failed to delete some children. This might happen because a process has files open or has its working directory set in the target directory

　　　　且不能强行delete掉apk文件；手动gradlew clean也没用

解决方法：关闭Android Studio重启后，再clean project（简单粗暴，然后就可以build啦