Countdown Timer

Android Count Down Timer With Toast Example:-

                                           In this sample application we will create a countdown timer in android using the CountDownTimer class .This is an example of showing a 15 second countdown in a TextView . We will update the TextView on every tick of the timer.

1)CountDownTimer.java

package com.Parthiv.CountdownTimer;

import java.util.Timer;

import java.util.TimerTask;

import android.os.Bundle;

import android.os.CountDownTimer;

import android.os.Handler;

import android.widget.TextView;

import android.widget.Toast;

import android.app.Activity;

public class CountDownTimer extends Activity {

Timer timer;

TimerTask timerTask;

final Handler handler = new Handler();

MyCountDown countdown;

private final long startTime = 15000; // 1000 = 1 second

private final long interval = 1000;

int timeRemain;

int remain;

TextView result;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final MyCountDown countdown = new MyCountDown(startTime, interval);

countdown.start();

startTimer();

}

public void startTimer() {

timer = new Timer();

initializeTimerTask();

timer.schedule(timerTask, 15000, 15000); //

}

public void initializeTimerTask() {

timerTask = new TimerTask() {

public void run() {

handler.post(new Runnable() {

public void run() {

final MyCountDown countdown = new MyCountDown(

startTime, interval);

countdown.start();

// Toast.makeText(MainActivity.this, "No Internet",

// 1000).show();

class MyCountDown extends CountDownTimer {

public MyCountDown(long millisInFuture,

long countDownInterval) {

super(millisInFuture, countDownInterval);

// TODO Auto-generated constructor stub

}

@Override

public void onFinish() {

// TODO Auto-generated method stub

TextView result = (TextView) findViewById(R.id.txtResult);

result.setText("");

Toast.makeText(MainActivity.this, "Finished!",

Toast.LENGTH_SHORT).show();

}

@Override

public void onTick(long remain) {

// TODO Auto-generated method stub

TextView result = (TextView) findViewById(R.id.txtResult);

timeRemain = (int) (remain) / 1000;

result.setText(" Countdown : " + timeRemain);

}

}

}

});

}

};

}

public class MyCountDown extends CountDownTimer {

public MyCountDown(long millisInFuture, long countDownInterval) {

super(millisInFuture, countDownInterval);

// TODO Auto-generated constructor stub

}

@Override

public void onFinish() {

// TODO Auto-generated method stub

TextView result = (TextView) findViewById(R.id.txtResult);

result.setText("");

Toast.makeText(MainActivity.this, "Finished!", Toast.LENGTH_SHORT)

.show();

}

@Override

public void onTick(long remain) {

// TODO Auto-generated method stub

TextView result = (TextView) findViewById(R.id.txtResult);

timeRemain = (int) (remain) / 1000;

result.setText(" Countdown : " + timeRemain);

}

}

}

2) activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#7754a3" >

    <TextView

        android:id="@+id/txtResult"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/btnStop"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="98dp"

        android:text="countdown"

        android:textColor="#fff"

        android:textSize="20dp" />

</RelativeLayout>

Output:-

     

After coundown finished Toast:-

                                       

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