Custom Timer Example in Android

Hello Friends,.


Today I am going to share important code for countdown watch in Android. For this I am using Handler Thread. Hope it will help you guys. Just copy paste below code and enjoy.

1. TimerActivity.java

package com.pack.counttimer;

import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.os.SystemClock;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

public class TimerActivity extends Activity {

private TextView textTimer;

private Button startButton;

private Button pauseButton;

private long startTime = 0L;

private Handler myHandler = new Handler();

long timeInMillies = 0L;

long timeSwap = 0L;

long finalTime = 0L;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_timer);

textTimer = (TextView) findViewById(R.id.textTimer);

startButton = (Button) findViewById(R.id.btnStart);

startButton.setOnClickListener(new View.OnClickListener() {

public void onClick(View view) {

startTime = SystemClock.uptimeMillis();

myHandler.postDelayed(updateTimerMethod, 0);

}

});

pauseButton = (Button) findViewById(R.id.btnPause);

pauseButton.setOnClickListener(new View.OnClickListener() {

public void onClick(View view) {

timeSwap += timeInMillies;

myHandler.removeCallbacks(updateTimerMethod);

}

});

}

private Runnable updateTimerMethod = new Runnable() {

public void run() {

timeInMillies = SystemClock.uptimeMillis() - startTime;

finalTime = timeSwap + timeInMillies;

int seconds = (int) (finalTime / 1000);

int minutes = seconds / 60;

seconds = seconds % 60;

int milliseconds = (int) (finalTime % 1000);

textTimer.setText("" + minutes + ":"

+ String.format("%02d", seconds) + ":"

+ String.format("%03d", milliseconds));

myHandler.postDelayed(this, 0);

}

};

}

2. activity_timer.xml

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

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

    android:layout_width="match_parent"

    android:background="#000000"

    android:layout_height="match_parent" >

    <TextView

        android:id="@+id/textTimer"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_above="@+id/btnPause"

        android:layout_centerHorizontal="true"

        android:layout_marginBottom="37dp"

        android:textSize="40sp"

        android:textColor="#ffffff"

        android:text="00:00:00" />

    <Button

        android:id="@+id/btnPause"

        android:layout_width="90dp"

        android:layout_height="45dp"

        android:layout_centerVertical="true"

        android:layout_toRightOf="@+id/btnStart"

        android:text="Pause" />

    <Button

        android:id="@+id/btnStart"

        android:layout_width="90dp"

        android:layout_height="45dp"

        android:layout_alignParentLeft="true"

        android:layout_centerVertical="true"

        android:layout_marginLeft="48dp"

        android:text="Start" />

</RelativeLayout>

Here is the output :

Happy Coding !!