解决办法:
最简单的解决办法就是把arduino SDK版本降到23,但也可能造成其他问题
其他解决办法:
https://github.com/Smile-SA/cordova-plugin-fileopener/issues/15
https://inthecheesefactory.com/blog/how-to-share-access-to-file-with-fileprovider-on-android-nougat/en
https://stackoverflow.com/questions/38200282/android-os-fileuriexposedexception-file-storage-emulated-0-test-txt-exposed