Timer in Android Studio Java

 

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        >
            <TextView
                android:layout_width="wrap_content"
                android:id="@+id/timerText"
                android:layout_height="wrap_content"
                android:layout_marginHorizontal="30dp"
                android:text="..."
                android:textSize="50dp"
                />
            <Button
                android:id="@+id/timerButton"
                android:layout_marginVertical="20dp"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="baslat"
                />

    </LinearLayout>
</RelativeLayout>

JAVA

package com.example.timerjava;
import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    private Button timerBtn;
    private TextView timerTxt;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        timerBtn = findViewById(R.id.timerButton);
        timerTxt = findViewById(R.id.timerText);

        timerBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                timerBtn.setEnabled(false);
                new CountDownTimer(60000,1000){
                    @Override
                    public void onTick(long l){
                        timerTxt.setText(""+l/1000);

                    }

                    @Override
                    public void onFinish() {
                        Toast.makeText(MainActivity.this, "sayım bitti", Toast.LENGTH_SHORT).show();
                        timerBtn.setEnabled(true);
                    }


                }.start();
            }
        });
    }
}

Github: https://github.com/EmreCogac/timerJava