Calculator

//Rijoanul Hasan Shanto
//Thursday April 19 2018

package com.example.robert_jr.calculator;

import android.os.StrictMode;
import android.support.annotation.StringDef;
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;

public class MainActivity extends AppCompatActivity {

    private EditText edtNumber1;
    private EditText edtNumber2;

    private Button btnAdd;
    private Button btnSub;
    private Button btnMul;
    private Button btnDiv;

    private TextView txtResult;

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

        edtNumber1 = (EditText) findViewById(R.id.edtNumber1);
        edtNumber2 = (EditText) findViewById(R.id.edtNumber2);
        btnAdd = (Button) findViewById(R.id.btnAdd);
        btnSub = (Button) findViewById(R.id.btnSub);
        btnMul = (Button) findViewById(R.id.btnMul);
        btnDiv = (Button) findViewById(R.id.btnDiv);
        txtResult = (TextView) findViewById(R.id.txtResult);

        btnAdd.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final double number1 = Double.parseDouble(edtNumber1.getText().toString());
                final double number2 = Double.parseDouble(edtNumber2.getText().toString());

                Double res = number1 + number2;

                txtResult.setText(String.valueOf(res));
            }
        });

        btnSub.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final double number1 = Double.parseDouble(edtNumber1.getText().toString());
                final double number2 = Double.parseDouble(edtNumber2.getText().toString());

                Double res = number1 - number2;

                txtResult.setText(String.valueOf(res));
            }
        });

        btnMul.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final double number1 = Double.parseDouble(edtNumber1.getText().toString());
                final double number2 = Double.parseDouble(edtNumber2.getText().toString());

                Double res = number1 * number2;

                txtResult.setText(String.valueOf(res));
            }
        });

        btnDiv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                final double number1 = Double.parseDouble(edtNumber1.getText().toString());
                final double number2 = Double.parseDouble(edtNumber2.getText().toString());

                if(number2 != 0)
                {
                    Double res = number1 / number2;

                    txtResult.setText(String.valueOf(res));
                }
                else txtResult.setText("Infinity");
            }
        });


    }
}