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1. Guerrero Serrano Aylin Miroslawa
Olvera Olmos Adrián
Posadas Pérez Yanori Marlene

16. package com.example.proyecto4;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.TextView;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;

17. }
public void calcular (View view){
EditText d1=(EditText) findViewById (R.id.num1);
EditText d2=(EditText) findViewById (R.id.num2);
TextView r=(TextView) findViewById (R.id.res);
RadioButton r0=(RadioButton) findViewById (R.id.radio0);
RadioButton r1=(RadioButton) findViewById (R.id.radio1);
double n1=Double.parseDouble(d1.getText().toString());
double n2=Double.parseDouble(d2.getText().toString());
double suma,resta;
if(r0.isChecked()==true){
suma=n1+n2;
r.setText(String.valueOf(suma));
}
else
if(r1.isChecked()==true){
resta=n1-n2;
r.setText(String.valueOf(resta));
}
}
}