intercheese_sample1

MainActivity.java

package com.mikkipastel.sample;

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

public class MainActivity extends AppCompatActivity {
    EditText input1, input2;
    TextView result;
    Button cal;
    RadioGroup operator;
    //RadioButton plus, minus, mutiply, divide;

    int in1, in2, out;

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

        input1 = (EditText)findViewById(R.id.input1);
        input2 = (EditText)findViewById(R.id.input2);
        result = (TextView)findViewById(R.id.output);
        cal = (Button)findViewById(R.id.calculate);
        //old
        //plus = (RadioButton)findViewById(R.id.rbPlus);
        //minus = (RadioButton)findViewById(R.id.rbMinus);
        //mutiply = (RadioButton)findViewById(R.id.rbMutiply);
        //divide = (RadioButton)findViewById(R.id.rbDivide);
        operator = (RadioGroup)findViewById(R.id.rgOperation);

        cal.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                try {
                    in1 = Integer.parseInt(input1.getText().toString());
                }
                catch (NumberFormatException e) {

                }
                try {
                    in2 = Integer.parseInt(input2.getText().toString());
                }
                catch (NumberFormatException e) {

                }
                switch (operator.getCheckedRadioButtonId()){
                    case R.id.rbPlus: //plus.isChecked()
                        out = in1 + in2;
                        break;
                    case R.id.rbMinus: //minus.isChecked()
                        out = in1 - in2;
                        break;
                    case R.id.rbMutiply: //multiply.isChecked()
                        out = in1 * in2;
                        break;
                    case R.id.rbDivide: //divide.isChecked()
                        if (in2 != 0){
                            out = in1 / in2;
                        } else {
                            Toast.makeText(MainActivity.this, "Divide by Zero", Toast.LENGTH_SHORT).show();
                        }
                        break;
                    default:
                        out = 0;
                }
                result.setText(out + "");
            }
        });
    }
}