Untitled

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;

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

import java.util.Random;

public class MainActivity extends AppCompatActivity {
    int result;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        Random rand1 = new Random();
        int randomNum1 = rand1.nextInt((9 - 1) + 1) + 1;
        Random rand2 = new Random();
        int randomNum2 = rand2.nextInt((9 - 1) + 1) + 1;
        String operationrandom;

        Random rand3 = new Random();
        int operationrandomnumber = rand3.nextInt((4 - 1) + 1) + 1;
        switch (operationrandomnumber){
            case 1:
                operationrandom = "+";
                result = randomNum1 + randomNum2;
                break;
            case 2:
                operationrandom = "-";
                result = randomNum1 - randomNum2;
                break;
            case 3:
                operationrandom = "*";
                result = randomNum1 * randomNum2;
                break;
            case 4:
                operationrandom = "/";
                result = randomNum1 / randomNum2;
                break;
            default:
                operationrandom = "+";
                result = randomNum1 + randomNum2;
                break;
        }
        TextView numara1 = (TextView) findViewById(R.id.number1);
        numara1.setText(Integer.toString(randomNum1)); //set text for text view
        TextView numara2 = (TextView) findViewById(R.id.number2);
        numara2.setText(Integer.toString(randomNum2)); //set text for text view
        TextView operation = (TextView) findViewById(R.id.operation);
        operation.setText(operationrandom); //set text for text view

    }
    TextView resulthere = (TextView) findViewById(R.id.resulthere);
    public void checkifright(View v) {
        EditText tahminsonuc = (EditText) findViewById(R.id.resultsubmit);
        int tahminedilensonuc = Integer.parseInt(tahminsonuc.getText().toString());
        if (tahminedilensonuc == result){
            resulthere.setText("You are right congrats!");
        }
        else{
            resulthere.setText("You are wrong !!! be careful");
        }

    }




}