Current directory does not seem to be a valid Flutter project directory.

[chihung93]

I can not generate Res.dart on my project anymore

[20156284]

Check your project if include theses files

checkFiles = new ArrayList<>();
checkFiles.add("lib");
checkFiles.add(".metadata");
checkFiles.add(".packages");
checkFiles.add("pubspec.lock");
checkFiles.add("pubspec.yaml");

https://github.com/ChinaStyle812/AssetsRefGenerator/blob/master/src/com/shenyong/flutter/checker/ProjChecker.java

if you have theses files and the tool will determine that you are the correct flutter project