It turns out that `Double.toString()` uses some default (?) locale , while `String.format("%.1f")` u...

# android

[nickk]

It turns out that Double.toString() uses some default (?) locale , while String.format("%.1f") uses the locale selected by the user.
So, I end up with two different decimal separators in the same message (both ‘,’ and ‘.’)

Is this expected behavior?

[Marc Knaup]

toString() returns a machine-readable string which can be parsed again using toDouble()

formatting is more for human-readable strings (but I guess can also be used for machine-readable output by using the right locale)

[nickk]

So, toString() uses the en-US locale in all cases, apparently.
(though a quick google search does not result into links to official docs)

[Marc Knaup]

No info in Kotlin doc, only Java doc.

https://docs.oracle.com/en/java/javase/12/docs/api/java.base/java/lang/Double.html#toString(double)