Insert Tanggal

 //inisialisasi tanggal
    internal var mDay: Int = 0
    internal var mMonth: Int = 0
    internal var mYear: Int = 0
    internal val DATE_DIALOG_ID = 1
    private val arrMonth = arrayOf("01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12")
    internal var tgl_lahir: String = ""


//dibagian dalem onCreate
// get the current date
        val c = Calendar.getInstance()
        mYear = c.get(Calendar.YEAR)
        mMonth = c.get(Calendar.MONTH)
        mDay = c.get(Calendar.DAY_OF_MONTH)
        et_tgl_lahir.setOnTouchListener(View.OnTouchListener { arg0, arg1 ->
            // TODO Auto-generated method stub
            showDialog(DATE_DIALOG_ID)
            true
        })


//diluar onCreate
override fun onCreateDialog(id: Int) : Dialog? {
        when (id) {
            DATE_DIALOG_ID -> return DatePickerDialog(
                this, mDateSetListener, mYear, mMonth, mDay
            )
        }
        return null
    }

    //untuk tanggal hari ini
    private fun getCurrentDate(): String {
        val current = Date()
        val frmt = SimpleDateFormat("yyyy-MM-dd")
        return frmt.format(current)
    }

    private val mDateSetListener = DatePickerDialog.OnDateSetListener { view, dayOfMonth, monthOfYear, year ->
        mDay = dayOfMonth
        mMonth = monthOfYear
        mYear = year

        val sdate = mYear.toString() + "-" + arrMonth[mMonth] + "-" + LPad(
            mDay.toString() + "",
            "0",
            2
        )  //ini jika habis di klik, format DD-MM-YYYY
        val sdate_ubah = LPad(
            mDay.toString() + "",
            "0",
            2
        ) + "-" + arrMonth[mMonth] + "-" + mYear //ini untuk di masukkan ke database, format YYYY-MM-DD

        et_tgl_lahir.setText(sdate) //ini tampilan
        tgl_lahir = sdate_ubah  //ini utk database
    }

    private fun LPad(schar: String, spad: String, len: Int): String {
        var sret = schar
        for (i in sret.length until len) {
            sret = spad + sret
        }
        return sret
    }