IssueTracker

Jetpack Compose version: 2023.08.00 (I know it's stale, I can't upgrade to latest due to PullToRefresh breaking changes I cannot address right now)

Jetpack Compose component(s) used: DatePicker, DatePickerState, TimePicker, TimePickerState

Android Studio Build: latest

Kotlin version: 2.0.10

Steps to Reproduce or Code Sample to Reproduce:

1. Define your datePickerState and timePickerState

val datePickerState = rememberDatePickerState(
        initialSelectedDateMillis = Clock.System.now().toEpochMilliseconds()
    )

val hour: Int = Instant.fromEpochMilliseconds(Clock.System.now().toEpochMilliseconds())
        .toLocalDateTime(TimeZone.currentSystemDefault()).hour
val minute: Int = Instant.fromEpochMilliseconds(Clock.System.now().toEpochMilliseconds())
        .toLocalDateTime(TimeZone.currentSystemDefault()).minute

val timePickerState = rememberTimePickerState(
        initialHour = hour,
        initialMinute = minute
    )

2. In DatePickerDialog and TimePickerDialog, consume datePickerState:

DatePickerDialog

        DatePickerDialog(
            onDismissRequest = {
                // logic here to dismiss dialog
            },
            confirmButton = {
                TextButton(
                    onClick = {
                        val datePickerDate = datePickerState.selectedDateMillis
                        Log.d(TAG, "datePickerDate: $datePickerDate")  // logs date without time

                        // logic here to use datePickerDate in combination with timePickerState hour and minute to store epoch time millis for usage

                        // logic here to dismiss dialog
                    }
                ) {
                    Text(
                        text = "OK"
                    )
                }
            },
            dismissButton = {
                TextButton(
                    onClick = {
                        // logic here to dismiss dialog
                    }
                ) {
                    Text(
                        text = "Dismiss"
                    )
                }
            }
        ) {
            DatePicker(state = datePickerState)
        }

TimePickerDialog

TimePickerDialog(
            onDismissRequest = {
                createEventViewModel.updateShowTimePicker(false)
            },
            confirmButton = {
                TextButton(
                    onClick = {
                        val datePickerDate = datePickerState.selectedDateMillis
                        Log.d(TAG, "datePickerDate: $datePickerDate")  // logs date without time

                        // logic here to use datePickerDate in combination with timePickerState hour and minute to store epoch time millis for usage

                        // logic here to dismiss dialog
                    }
                ) {
                    Text(
                        text = "OK"
                    )
                }
            },
            dismissButton = {
                TextButton(
                    onClick = {
                        // logic here to dismiss dialog
                    }
                ) {
                    Text(
                        text = "Dismiss"
                    )
                }
            }
        ) {
            TimePicker(state = timePickerState)
        }

As you can see, it's essential to have datePickerDate contain the stored time in order to get the right date.

NOTE: this doesn't fix https://issuetracker.google.com/issues/281859606