DatePicker and TimePicker components for Jetpack Compose.

DatePicker.kt

@Composable
fun DatePicker(
    label: String,
    value: String,
    onValueChange: (String) -> Unit = {},
    keyboardActions: KeyboardActions = KeyboardActions.Default,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    pattern: String = "yyyy-MM-dd",
) {
    val formatter = DateTimeFormatter.ofPattern(pattern)
    val date = if (value.isNotBlank()) LocalDate.parse(value, formatter) else LocalDate.now()
    val dialog = DatePickerDialog(
        LocalContext.current,
        { _, year, month, dayOfMonth ->
            onValueChange(LocalDate.of(year, month + 1, dayOfMonth).toString())
        },
        date.year,
        date.monthValue - 1,
        date.dayOfMonth,
    )

    TextField(
        label = { Text(label) },
        value = value,
        onValueChange = onValueChange,
        enabled = false,
        modifier = Modifier.clickable { dialog.show() },
        keyboardOptions = keyboardOptions,
        keyboardActions = keyboardActions,
    )
}

TimePicker.kt

@Composable
fun TimePicker(
    label: String,
    value: String,
    onValueChange: (String) -> Unit,
    keyboardActions: KeyboardActions = KeyboardActions.Default,
    keyboardOptions: KeyboardOptions = KeyboardOptions.Default,
    pattern: String = "HH:mm",
    is24HourView: Boolean = true,
) {
    val formatter = DateTimeFormatter.ofPattern(pattern)
    val time = if (value.isNotBlank()) LocalTime.parse(value, formatter) else LocalTime.now()
    val dialog = TimePickerDialog(
        LocalContext.current,
        { _, hour, minute -> onValueChange(LocalTime.of(hour, minute).toString()) },
        time.hour,
        time.minute,
        is24HourView,
    )

    TextField(
        label = { Text(label) },
        value = value,
        onValueChange = onValueChange,
        enabled = false,
        modifier = Modifier.clickable { dialog.show() },
        keyboardOptions = keyboardOptions,
        keyboardActions = keyboardActions,
    )
}

I have again updated the Gist as instructed but I'm unable to test that it actually works so I cannot guarantee that the components works with the latest version Jetpack Compose.