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Jetpack Compose - Alert Dialogs
The code presented in this article is using compose rc01
Jetpack Compose brings us with a cool new UI toolkit, but some things are completely different from how we are used to it, one of these cases is
AlertDialog a common component on any application.var showDialog by remember { mutableStateOf(false) }You may need to import:
import androidx.compose.runtime.getValue
import androidx.compose.runtime.setValue
if (showDialog) {
AlertDialog(
onDismissRequest = { },
title = { },
text = { },
confirmButton = { },
dismissButton = { },
)
}Let's see what's each param of
AlertDialog composable method:onDismissRequest = { },Will be called when clicking outside of a dialog, here we must set showDialog to false to remove it from our stack.
title = { },
text = { },Add a Text to show a title and message of our AlertDialog
confirmButton = { },
dismissButton = { },Define a Button or TextButton and its Text to get actions like "Accept" or "Cancel"
When click on confirm or button we must set our
showDialog to false also, to avoid showing the dialog on the next recomposition.onDismissRequest = { showDialog = false },
confirmButton = { showDialog = false },
dismissButton = { showDialog = false },What if we want to display custom content, like a list of items to select one?
text = {
LazyColumn {
items(...) { item -> Text(text = item) }
}
},Use the
text field of AlertDialog to display any content that is needed and handle the dialog in the same way of buttons: showDialog = false.Hope you enjoyed the article!
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