Práctica de Android Studio - Aplicaciones Móviles

1. IESTP “RAMON COPAJA”
Lic. Noé ARPASI JIMENEZ -1- U.D. “Aplicaciones Móviles”
PROYECTO: CALCULADORA
1. INTERFAZ: activity_main.xml
2. CODIGO: ManiActivity.java
package ga.gestionweb.calculadora1;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
EditText txtnum1, txtnum2;
Button btnS, btnR, btnM, btnD;
TextView txtRes;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txtnum1 = (EditText) findViewById(R.id.txtn1);
txtnum2 = (EditText) findViewById(R.id.txtn2);
btnS = (Button) findViewById(R.id.btnSuma);
btnR = (Button) findViewById(R.id.btnResta);
btnM = (Button) findViewById(R.id.btnMultiplicacion);
btnD = (Button) findViewById(R.id.btnDivision);
txtRes = (TextView) findViewById(R.id.txtResultado);

2. IESTP “RAMON COPAJA”
Lic. Noé ARPASI JIMENEZ -2- U.D. “Aplicaciones Móviles”
btnS.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int
num1=Integer.parseInt(txtnum1.getText().toString());
int
num2=Integer.parseInt(txtnum2.getText().toString());
int suma=num1+num2;
txtRes.setText("Resultado : "+suma);
}
});
btnR.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int
num1=Integer.parseInt(txtnum1.getText().toString());
int
num2=Integer.parseInt(txtnum2.getText().toString());
int suma=num1-num2;
txtRes.setText("Resultado : "+suma);
}
});
btnM.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int
num1=Integer.parseInt(txtnum1.getText().toString());
int
num2=Integer.parseInt(txtnum2.getText().toString());
int suma=num1*num2;
txtRes.setText("Resultado : "+suma);
}
});
btnD.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int num1 =
Integer.parseInt(txtnum1.getText().toString());
int num2 =
Integer.parseInt(txtnum2.getText().toString());
int suma = num1 / num2;
txtRes.setText("Resultado : " + suma);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it
is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

3. IESTP “RAMON COPAJA”
Lic. Noé ARPASI JIMENEZ -3- U.D. “Aplicaciones Móviles”
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}