계산기 어플 소스 way1

package com.example.ryan.myapplication;

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

public class MainActivity extends AppCompatActivity {

    EditText editText1;
    EditText editText2;
    TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button button1=(Button)findViewById(R.id.button1);
        Button button2=(Button)findViewById(R.id.button2);
        Button button3=(Button)findViewById(R.id.button3);
        Button button4=(Button)findViewById(R.id.button4);



        //way1

//        button1.setOnClickListener(new View.OnClickListener(){
//            public void onClick(View v){
//                Toast.makeText(getApplicationContext(),"버튼이 눌러졌습니다",Toast.LENGTH_SHORT).show();
//                String num1=editText1.getText().toString();
//                String num2=editText2.getText().toString();
//                int result =Integer.parseInt(num1)+Integer.parseInt(num2);
//                textView.setText(String.valueOf(result));
//            }
//        });

        editText1 = (EditText) findViewById(R.id.editText1);
        editText2 = (EditText) findViewById(R.id.editText2);
        textView = (TextView) findViewById(R.id.textView);
    }


        public void onClickButton1(View v) {
            String num1 = editText1.getText().toString();
            String num2 = editText2.getText().toString();

            int result = Integer.parseInt(num1) + Integer.parseInt(num2);
            textView.setText(String.valueOf(result));
        }




    public void onClickButton2(View v) {
        String num1 = editText1.getText().toString();
        String num2 = editText2.getText().toString();

        int result = Integer.parseInt(num1) - Integer.parseInt(num2);
        textView.setText(String.valueOf(result));
    }

    public void onClickButton3(View v) {
        String num1 = editText1.getText().toString();
        String num2 = editText2.getText().toString();

        int result = Integer.parseInt(num1) * Integer.parseInt(num2);
        textView.setText(String.valueOf(result));

    }
    public void onClickButton4(View v){
        String num1=editText1.getText().toString();
        String num2=editText2.getText().toString();

        int result =Integer.parseInt(num1)/Integer.parseInt(num2);
        textView.setText(String.valueOf(result));

    }






    }