Android: need to validate an edittext for non-blank input

views:

667

answers:

Android: need to validate an edittext for non-blank input

If I want to enforce a maximum length of input in an EditText field, I can use the maxLength attribute. But if I want to enforce a minimum length (in my case, simply non-blank), I find no corresponding minLength attribute.

I've also looked at the various 'inputType' attributes (phone, password, etc) but I don't see anything like 'required' or 'non-blank'.

I can't believe this would require a custom input filter; it's more likely the answer is so obvious it just doesn't get written down in the form I'm asking the question.

+1 A:

You can simply check that yourField.text() is not equivalent to null or "" at the point of submission. If it is, prompt the user to input something.

jqpubliq 2010-04-22 17:07:47

Maybe also trim the string if you don't want whitespace to count as an imput.

fiXedd 2010-04-22 17:38:40

I appreciate both suggestions. And that's essentially what I'm doing -- validating after all fields in the screen are filled in and the user pushes the 'go' button. But what I was looking/hoping for was a way to give instant feedback when focus leaves one field before it goes to the next.

AG 2010-04-22 20:58:10

Then you just want to do the check in the `onFocusChanged()` of the EditText

jqpubliq 2010-04-22 22:17:52

THAT's what I was missing. I looked at onFocusChanged() but was lead astray by it being a View method so I was thinking it applied to something other than a single field. But, of course, an EditText is a TextView which is, in turn, a View. Thanks.

AG 2010-04-23 15:54:17

ansaurus

tags:

views:

answers:

Android: need to validate an edittext for non-blank input

related questions