java code for calculater

//java code for calculater +, -, *, /,

package com.rafiqhussain.rafiqcalculater;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {


    //inshlaiz ابتدا

       // field or vareble  diclarerion 
    EditText etFirtsvalue , edSecondValue;
    TextView tvAns;
    Button add, sub, multyply, divide;

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

        // (xml item's k ID's) ko find kar k variable (etFirtsvalue ) sy band dia jor kia gia...

        etFirtsvalue = findViewById(R.id.et_1);//is main user jo value dega us ko ham sy integer main badalna hoga line 51 main +-/* ko karny k liy nahi to nahi hoga.
        edSecondValue = findViewById(R.id.et_2);

        tvAns = findViewById(R.id.tvAns);

        add = findViewById(R.id.btnAdd);
        sub = findViewById(R.id.btnSub);
        multyply = findViewById(R.id.btnMulti);
        divide = findViewById(R.id.btnDivid);


        //is line sy (Ans is =) pehle sy show hoga (textView) main
        tvAns.setText("Ans is =");

        // yahan par functions kia sab cheezon ko

        add.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //yahan sy function shoro hoga.
                /*jo value user enter karta hy us ko string main badalna hoga string main
                badalny ky k baad is ko integer main badal sakty hain*/
                /*
                isliy ham int datatype ka 3 varible banay gy
                name hoga --firstValue , second Value , ans;--
                */
                int firstValue , secondValue , ans;

                //hamry 1st and 2nd value intger main badal gai
                firstValue = Integer.parseInt(etFirtsvalue.getText().toString());
                secondValue = Integer.parseInt(edSecondValue.getText().toString());
                //is line k main 1st and 2nd Value ko plus hojay ga
                ans = firstValue + secondValue;
                // is line main tvAns main Answar sho hojay ga
                //"Ans is = "+ k madad sy aap java main text show hojay ga is no (cocatinat) bolty hain

                tvAns.setText("Ans is = "+ans);

            }
        });

        sub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //yahan sy function shoro hoga.
                /*jo value user enter karta hy us ko string main badalna hoga string main
                badalny ky k baad is ko integer main badal sakty hain*/
                /*
                isliy ham int datatype ka 3 varible banay gy
                name hoga --firstValue , second Value , ans;--
                */
                int firstValue , secondValue , ans;

                //hamry 1st and 2nd value intger main badal gai
                firstValue = Integer.parseInt(etFirtsvalue.getText().toString());
                secondValue = Integer.parseInt(edSecondValue.getText().toString());

                //is line k main 1st and 2nd Value ko plus hojay ga
                ans = firstValue - secondValue;

                // is line main tvAns main Answar sho hojay ga
                //"Ans is = "+ k madad sy aap java main text show hojay ga is no (cocatinat) bolty hain
                tvAns.setText("Ans is = "+ ans);

            }
        });

        multyply.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //yahan sy function shoro hoga.
                /*jo value user enter karta hy us ko string main badalna hoga string main
                badalny ky k baad is ko integer main badal sakty hain*/
                /*
                isliy ham int datatype ka 3 varible banay gy
                name hoga --firstValue , second Value , ans;--
                */
                int firstValue , secondValue , ans;

                //hamry 1st and 2nd value intger main badal gai
                firstValue = Integer.parseInt(etFirtsvalue.getText().toString());
                secondValue = Integer.parseInt(edSecondValue.getText().toString());

                //is line k main 1st and 2nd Value ko plus hojay ga
                ans = firstValue * secondValue;

                // is line main tvAns main Answar sho hojay ga
                //"Ans is = "+ k madad sy aap java main text show hojay ga is no (cocatinat) bolty hain
                tvAns.setText("Ans is = "+ ans);

            }
        });

        divide.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                //yahan sy function shoro hoga.
                /*jo value user enter karta hy us ko string main badalna hoga string main
                badalny ky k baad is ko integer main badal sakty hain*/
                /*
                isliy ham int datatype ka 3 varible banay gy
                name hoga --firstValue , second Value , ans;--
                */
                int firstValue , secondValue , ans;

                //hamry 1st and 2nd value intger main badal gai
                firstValue = Integer.parseInt(etFirtsvalue.getText().toString());
                secondValue = Integer.parseInt(edSecondValue.getText().toString());

                //is line k main 1st and 2nd Value ko plus hojay ga
                ans = firstValue / secondValue;

                // is line main tvAns main Answar sho hojay ga
                //"Ans is = "+ k madad sy aap java main text show hojay ga is no (cocatinat) bolty hain
                tvAns.setText("Ans is = "+ ans);

            }
        });
        //is line sy oopar wala actionBar hide hojay ga..
        getSupportActionBar().hide();





    }
}