MainActivity.java

package com.techhelpbd.digitaltasbih;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    TextView tvCount,mahbubDev;
    Button buttonAdd, buttonSub, buttonReset;
    int count=0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        tvCount = findViewById(R.id.tvCount);
        mahbubDev = findViewById(R.id.mahbubDev);
        buttonAdd = findViewById(R.id.buttonAdd);
        buttonSub = findViewById(R.id.buttonSub);
        buttonReset = findViewById(R.id.buttonReset);


//============================================================================
        //on click event here

        buttonAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                count++;
                tvCount.setText(""+count);

            }
        });



        buttonSub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                count--;

                tvCount.setText(""+count);

            }
        });



        buttonReset.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                count = 0;
                tvCount.setText(""+count);


            }
        });






    }
}