java.lang.NumberFormatException: Invalid int: “” in android

Question

I already know what is causing this error, I just do not know how to handle the case when a user doesn\'t enter anything into the dialogue box, then hit the button which par

Answer 1

Problem: How do you check to see if the dialogue box has text in it, before it tries to run the rest of the code.

Solution: An if statement.

 int parseToInt(String maybeInt, int defaultValue){
     if (maybeInt == null) return defaultValue;
     maybeInt = maybeInt.trim();
     if (maybeInt.isEmpty()) return defaultValue;
     return Integer.parseInt(maybeInt);
 }

If you can spare the extra dependency, I'd pull in Common Lang StringUtils, to use StringUtils.isBlank instead of trim/isEmpty, because that also handles Unicode.