semantics Vs clearAndSetSemantics
When working on accessibility in a Jetpack Compose UI, you use
clearAndSetSemantics to give the user information about the UI they are interacting with. But how do you know when to use
If an element has no children, you can use
semantics to override the default behavior for that element. If an element has children, but you just want it all read as a single logical element use
semantics but set the
mergeDescendants parameter to
true. If you use
mergeDescendants but want certain children to still read, you can also set
true for those elements and they will not be merged into the parent. Finally, if you want to have a parent element to have a fully custom
contentDescription and don't want the children read, use
clearAndSetSemantics. Remember that even if you use
mergeDescendants and a custom
contentDescription in a
semantics modifier that the system will read both the custom description and the merged descendent description.
Want to see it in action? Check out this gist showing how TalkBack intreprets different modifiers.
That's all you need to know to start using
clearAndSetSemantics in your app. I hope this helps you give your users the best possible experience. Until next time, thanks!
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