Counter, MainActivity2.java

package com.example.myapplication0710;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity2 extends AppCompatActivity {
    Button btnBack;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        btnBack=findViewById(R.id.btnBack);


        Intent intent= this.getIntent();
        int c=intent.getIntExtra("COUNT_VALUE",-1);
        btnBack.setText(c+"");

        Toast.makeText(this, c+"", Toast.LENGTH_LONG).show();
    }

    public void clickMe(View view) {
        //Intent intent = new Intent(this, MainActivity.class);
        //startActivity(intent);

        finish();
    }
}