Sunday, April 8, 2018

android kotlin - CountDownTimer days hours minutes seconds example

MainActivity.kt

package com.cfsuman.kotlinexamples

import android.content.Context
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main.*
import android.os.CountDownTimer
import java.util.*
import java.util.concurrent.TimeUnit


class MainActivity : AppCompatActivity() {

    private var isCancelled = false

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // 60 seconds (1 minute)
        val minute:Long = 1000 * 60 // 1000 milliseconds = 1 second

        // 1 day 2 hours 35 minutes 50 seconds
        val millisInFuture:Long = (minute * 1440) + (minute * 155) + (1000 * 50)

        // Count down interval 1 second
        val countDownInterval:Long = 1000


        // Count down timer start button
        button_start.setOnClickListener{
            // Start the timer
            timer(millisInFuture,countDownInterval).start()
            it.isEnabled = false
            button_stop.isEnabled = true

            isCancelled = false
        }


        // Count down timer stop/cancel button
        button_stop.setOnClickListener{
            // Start the timer
            isCancelled = true

            it.isEnabled = false
            button_start.isEnabled = true
        }
    }



    // Method to configure and return an instance of CountDownTimer object
    private fun timer(millisInFuture:Long,countDownInterval:Long):CountDownTimer{
        return object: CountDownTimer(millisInFuture,countDownInterval){
            override fun onTick(millisUntilFinished: Long){
                val timeRemaining = timeString(millisUntilFinished)
                if (isCancelled){
                    text_view.text = "${text_view.text}\nStopped.(Cancelled)"
                    cancel()
                }else{
                    text_view.text = timeRemaining
                }
            }

            override fun onFinish() {
                text_view.text = "Done"

                button_start.isEnabled = true
                button_stop.isEnabled = false
            }
        }
    }



    // Method to get days hours minutes seconds from milliseconds
    private fun timeString(millisUntilFinished:Long):String{
        var millisUntilFinished:Long = millisUntilFinished
        val days = TimeUnit.MILLISECONDS.toDays(millisUntilFinished)
        millisUntilFinished -= TimeUnit.DAYS.toMillis(days)

        val hours = TimeUnit.MILLISECONDS.toHours(millisUntilFinished)
        millisUntilFinished -= TimeUnit.HOURS.toMillis(hours)

        val minutes = TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)
        millisUntilFinished -= TimeUnit.MINUTES.toMillis(minutes)

        val seconds = TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished)

        // Format the string
        return String.format(
                Locale.getDefault(),
                "%02d day: %02d hour: %02d min: %02d sec",
                days,hours, minutes,seconds
        )
    }
}



// Extension function to show toast message
fun Context.toast(message: String) {
    Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
}
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/root_layout"
    android:background="#dbf2f9"
    android:padding="16dp"
    android:orientation="vertical"
    >
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_gravity="center_horizontal"
        >
        <Button
            android:id="@+id/button_start"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Start"
            />
        <Button
            android:id="@+id/button_stop"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Stop(Cancel)"
            android:enabled="false"
            />
    </LinearLayout>
    <TextView
        android:id="@+id/text_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#224889"
        android:layout_gravity="center_horizontal"
        android:textSize="25sp"
        android:layout_marginTop="30dp"
        android:gravity="center"
        android:textStyle="bold"
        />
</LinearLayout>