How to create Timer in Android Studio in very simple and easy Steps?

 A Timer in an Android Application is used to set a countdown based on the interval set by the users. You can create this Timer in your Android Application to create any countdown for any particular event such as a countdown for any quiz or test in your application. In this blog, I am going to share a simple way of creating such a Timer.

Desired Result:

SetUp:

Add these codes to your project.

1. In build.gradle (project)

     allprojects {
       repositories {
                maven { url 'https://jitpack.io' }
                    }
                }

2. In build.gradle (module)

     dependencies {
          implementation 'com.github.jaeryo2357:circleTimer:1.1.3'
                  }

After the setup is complete sync your project and create a layout for your Application.

XML file :

<?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=".MainActivity">

    <com.mut_jaeryo.circletimer.CircleTimer
        android:layout_width="wrap_content"
        android:layout_height="200dp"
        app:init_position="3360"
        app:isOutline="true"
        android:id="@+id/circle_timer"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.22"
        app:show_text="true"></com.mut_jaeryo.circletimer.CircleTimer>

    <Button
        android:id="@+id/start_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="64dp"
        android:layout_marginBottom="72dp"
        android:padding="10dp"
        android:text="Start"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="72dp"
        android:padding="10dp"
        android:id="@+id/end_button"
        android:text="Stop"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.833"
        app:layout_constraintStart_toStartOf="@id/start_button" />

</androidx.constraintlayout.widget.ConstraintLayout>

After successfully creating the layout now comes the Java part. Add the following code in your MainActivity.

MainActivity:

package com.example.circletimer;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.mut_jaeryo.circletimer.CircleTimer;

public class MainActivity extends AppCompatActivity {
private CircleTimer timer;
private Button start_button,stop_button;
private EditText editText;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        timer =findViewById(R.id.circle_timer);
        start_button=findViewById(R.id.start_button);
        stop_button=findViewById(R.id.end_button);
        
        // set the countdown limit (in seconds)
        timer.setMaximumTime(10);   //here countdown limit is 10 seconds
        timer.setInitPosition(10);

        // when start button is clicked
        start_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                timer.start();
            }
        });

        //when stop button is clicked
        stop_button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                timer.stop();
            }
        });

        // when the desired countdown is over
        timer.setBaseTimerEndedListener(new CircleTimer.baseTimerEndedListener() {
            @Override
            public void OnEnded() {
                Toast.makeText(MainActivity.this, "Time is up", 
                        Toast.LENGTH_SHORT)
                        .show();
                timer.reset();
            }

        });
    }
}

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