How to parse a double from EditText to TextView? (Android)

Question

I\'m realy beginning to learn Java. When I run this code everything works fine till I leave my EditText boxes in the from empty and hit the run button. Then I get:

Answer 1

This is a java question, not an android question.

You should handle the NumberFormat exception in your code. What happens if somebody enters "abc" into the text box? What do you want your app to do? You handle exceptions using try/catch blocks: http://tutorials.jenkov.com/java-exception-handling/basic-try-catch-finally.html

You might also want to check if noKids.getText().toString() is empty before trying to convert it. It might make sense for there to be a different feedback to the user if the string is "" vs if the string is "abc".