Show custom alert dialog in Jetpack Compose

Starting from M3 1.1.0-alpha04 there is an AlertDialog composable function with a slot for content.

val openDialog = remember { mutableStateOf(true) }

if (openDialog.value) {
    androidx.compose.material3.AlertDialog(
        onDismissRequest = {
            // Dismiss the dialog when the user clicks outside the dialog or on the back
            // button. If you want to disable that functionality, simply use an empty
            // onDismissRequest.
            openDialog.value = false
        }
    ) {
        Surface(
            modifier = Modifier
                .wrapContentWidth()
                .wrapContentHeight(),
            shape = MaterialTheme.shapes.large
        ) {
            Column(modifier = Modifier.padding(16.dp)) {

                //... AlertDialog content
            }
        }
    }
}

---

Before M3 1.1.0-alpha04 or with M2, you can use the standard AlertDialog.
The text,title and buttons parameters support @Composable functions and in this way you can customize the dialog as you prefer.

For example:

val openDialog = remember { mutableStateOf(true) }
var text by remember { mutableStateOf("") }

if (openDialog.value) {
    AlertDialog(
        onDismissRequest = {
            openDialog.value = false
        },
        title = {
            Text(text = "Title")
        },
        text = {
            Column() {
                TextField(
                    value = text,
                    onValueChange = { text = it }
                )
                Text("Custom Text")
                Checkbox(checked = false, onCheckedChange = {})
            }
        },
        buttons = {
            Row(
                modifier = Modifier.padding(all = 8.dp),
                horizontalArrangement = Arrangement.Center
            ) {
                Button(
                    modifier = Modifier.fillMaxWidth(),
                    onClick = { openDialog.value = false }
                ) {
                    Text("Dismiss")
                }
            }
        }
    )
}