How to set a timer in Android

In this android programming source code example, we are going to set a timer in Android.

You can copy and adopt this source code example to your android project without reinventing the wheel.

Below is a step by step source code to set a timer in Android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"    tools:context=".WorkManagerAndJobSchedule.WorkManagerAndJobScheduleActivity18">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginStart="10dp"
        android:layout_marginEnd="10dp">

        <TextView
            android:id="@+id/tvtime"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center_horizontal"
            android:text="....."
            android:textColor="#000000"
            android:textSize="19sp"/>

        <Button
            android:id="@+id/timer"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent"
            android:text="Set Timer"
            android:textAllCaps="false"
            android:textColor="#ffffff"
            android:textSize="19sp"
            android:layout_marginTop="10dp"/>

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.Timer;
import java.util.TimerTask;

public class WorkManagerAndJobScheduleActivity18 extends AppCompatActivity {
    private TextView tvtime;
    private Button timer;
    private int time;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_work_manager_and_job_schedule18);
        tvtime = (TextView) findViewById(R.id.tvtime);
        timer = (Button) findViewById(R.id.timer);
        timer.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startTimer();
            }
        });
    }

    private void startTimer(){
        final Timer mtimer = new Timer();
        mtimer.scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        tvtime.setText(String.valueOf(time));
                        time++;
                    }
                });
            }
        }, 0, 1000);

    }
}

If you have any question or suggestions kindly use the comment box or you can contact us directly through our contact page below.

Add a Comment

This site uses Akismet to reduce spam. Learn how your comment data is processed.

50% Discounts On Projects

Do you have a custom project with a clear requirements, we are currently giving a 50% discount on all projects.

We will work with you to ensure we deliver what you need.

If you have questions or want to chat with us, you can reach us on Skype (henry.tochi)

Languages and technologies we use - Java, Kotlin, Laravel, Vue, React, Flutter, Swift and more.