Kotlin Caveats - Edit Text

Calling a toString() on a nullable type

A thing to look out for when using the toString method in Kotlin is the handling of null in combination with the

String?.

For example, you want to get a text from an EditText in Android.

You would have a piece of code like:

Incorrect:

val text = view.textField?.text.toString() ?: ""

You would expect that if the field did not exists the value would be an empty string but in this case it is "null".

Correct:

val text = view.textField?.text?.toString() ?: ""