package com.artech.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    Button button;
    EditText edit1,edit2;
    TextView txtResult;
    Integer num1,num2,result;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = findViewById(R.id.btn);
         edit1 =  findViewById(R.id.et);
         edit2 =  findViewById(R.id.et1);
         txtResult = findViewById(R.id.txtResult);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                    add();
            }
        });
    }

    public void add(){
        String number1 =  edit1.getText().toString().trim();
        String number2 = edit2.getText().toString().trim();
        if (number1.isEmpty()){
            Toast.makeText(this, "No TEXT in first number", Toast.LENGTH_SHORT).show();
        }else if (number2.isEmpty()){
            Toast.makeText(this, "Enter second number", Toast.LENGTH_SHORT).show();
        }else{
            num1 = Integer.parseInt(number1);
            num2 = Integer.parseInt(number2);
            result = num1 + num2;
            txtResult.setText("The adding value : "+result);
        }
    }
}