Why does Android Lint warn about String.format using default locale when explicitly using Locale.US?
Solution 1:
Cleaning and rebuilding the project should work.
BTW, you may want to use Locale.getDefault() to "take care" of texts not written in english.
Solution 2:
when I mentioned the locale with the format, the lint warning just vanished.
String.format(Locale.US,"%02d", selectedInt);