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Extract correct combination of digits from string

androidregexsubstringreplacealllastindexof
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This works with all the examples from your logcat messages:

java 
Pattern pattern = Pattern.compile("\\d+\\.\\d+(\\.[\\d]+)?");
Matcher matcher = pattern.matcher(NewVersion);
if (matcher.find()) {
  String version = matcher.group();
}

https://regex101.com/r/P7lICp/1

Personally, I would rethink what you are doing.

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