can we write both and() and or() conditions in the showwhen activity. i have tried for a text field. if the checkbox is selected the textbox should appear. but it is also appearing in the next page. can anyone pls help
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the showWhen takes a Boolean. So as long as your logic returns 'true' or 'false' then it doesn't matter what constructs you use.
As an addendum - I'd strongly encourage you to encapsulate the logic into an Expression rule, separate form the Interface, unless it is only a single value comparison. In this way you can a) independently test it and confirm that it is working as expected and b) you can attach Unit Tests to the rule which means you can provide continual Quality Assurance on the logic as your application evolves. It also makes a clear separation between business logic and presentation which is just good practice.