Functions:

• Set Icons Color Function
• Check expiration date
• Format Time (Int to String)
• Format Time (LocalTime to String)
• Format Time (Calendar to String)
• Format Date (Int to String)
• Format Duration Time
• Difference Date
• Format Money (Double to String)
• BitMap To String
• String To BitMap

import android.content.Context
import android.content.Intent
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.util.Base64.*
import android.widget.ImageView
import java.io.ByteArrayOutputStream
import java.math.BigDecimal
import java.text.NumberFormat
import java.text.SimpleDateFormat
import java.time.LocalDateTime
import java.time.LocalTime
import java.time.format.DateTimeFormatter
import java.time.temporal.ChronoUnit
import java.util.*


/**
 * object containing common functions
 * for the App
 */
object CommonApp{

    //Set Icons Color Function
    fun setIconColor(context: Context, icon: ImageView?, color: Int){

        icon?.setColorFilter(
            ContextCompat.getColor(context, color)
        )
    }

    //Check expiration date
    fun isDateExpired(dayOfMonth: Int, monthOfYear: Int, year: Int): Boolean {

        val expDate = GregorianCalendar(year, monthOfYear, dayOfMonth)
        val now = GregorianCalendar()

        return now.after(expDate)
    }

 //////////////////////// FORMAT TIME /////////////////////////////
    fun formatTime(time: Int): String {

        return SimpleDateFormat("HH:mm")
            .format(Date(time * 1000L))
    }

    fun formatTime(time: LocalTime): String {

        val formatter = DateTimeFormatter.ofPattern("HH:mm")
        return time.format(formatter)
    }

    fun formatTime(time: Calendar): String {

        val format = SimpleDateFormat("HH:mm")
        return format.format(time.time)
    }

//////////////////////// FORMAT DATE /////////////////////////////
    fun formatDate(date: Int): String {

        return SimpleDateFormat("dd MMMM yyyy")
            .format(Date(date * 1000L))
    }

    fun formatMonthYear(date: Int): String {

        return SimpleDateFormat("MMMM yyyy")
            .format(Date(date * 1000L))
    }



 //////////////////////// FORMAT MINUTES /////////////////////////////
    fun formatDurationTime(minutes: Int, initial: String): String = if (minutes < 60) {

        "$minutes $initial"

    } else {

        val min = (minutes) % 60
        val hours = (minutes) / 60
        String.format("%02dh %02dm", hours, min)
    }

    fun differenceDate(fromDateTime: LocalDateTime, toDateTime: LocalDateTime) {

        var tempDateTime = LocalDateTime.from(fromDateTime)
        
        val days = tempDateTime.until(toDateTime, ChronoUnit.DAYS)
        tempDateTime = tempDateTime.plusDays(days)


        val hours = tempDateTime.until(toDateTime, ChronoUnit.HOURS)
        tempDateTime = tempDateTime.plusHours(hours)

        val minutes = tempDateTime.until(toDateTime, ChronoUnit.MINUTES)
        tempDateTime = tempDateTime.plusMinutes(minutes)

        val seconds = tempDateTime.until(toDateTime, ChronoUnit.SECONDS)

    }

 //////////////////////// FORMAT MONEY /////////////////////////////
    fun formatMoney(amount: Double): String {
        val formatter = NumberFormat.getCurrencyInstance(Locale.ITALY)
        return formatter.format(BigDecimal(amount))
    }

    
 //////////////////////// CONVERT BITMAP /////////////////////////////
    fun BitMapToString(bitmap: Bitmap): String {
        val baos = ByteArrayOutputStream()
        bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos)
        val b = baos.toByteArray()
        return encodeToString(b, DEFAULT)
    }

    fun StringToBitMap(encodedString: String?): Bitmap? {
        return try {
            val encodeByte: ByteArray = decode(encodedString, DEFAULT)
            BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.size)
        } catch (e: Exception) {
            e.message
            null
        }
    }
}

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