当前，jetpack compose处于Alpha状态，并且在AndroidX.ui.*中没有日期时间选择器。但是，以后android团队会添加它或使jetpack compose与其他组件（如android.Widget.DatePicker）互操作，或者我们可以像flutter那样使用jetpack compose从stratch开发漂亮的日期时间选择器

就目前而言,

class DateTimeActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val c = Calendar.getInstance()
        val year = c.get(Calendar.YEAR)
        val month = c.get(Calendar.MONTH)
        val day = c.get(Calendar.DAY_OF_MONTH)
        val mHour = c[Calendar.HOUR_OF_DAY]
        val mMinute = c[Calendar.MINUTE]

        val datePickerDialog = DatePickerDialog(
            this, DatePickerDialog.OnDateSetListener
            { datePicker: DatePicker, day: Int, month: Int, year: Int ->
                setContent {
                    Column {
                        Text("$day, $month, $year")
                    }
                }
            }, year, month, day
        )


        val timePickerDialog = TimePickerDialog(
            this,
            TimePickerDialog.OnTimeSetListener { view, hourOfDay, minute ->
                setContent {
                    Column {
                        Text("$hourOfDay:$minute")
                    }
                }
            }, mHour, mMinute, false
        )


        setContent {
            Column {
                Button(text = "Date",
                    style = OutlinedButtonStyle(),
                    onClick = {
                        datePickerDialog.show()
                    })
                Button(text = "Time",
                    style = OutlinedButtonStyle(),
                    onClick = {
                        timePickerDialog.show()
                    })
            }
        }
    }
}