mjj

1. HOLA MUNDO (CODIFICACION)
package com.example.holamundo;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
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)
{

2. // Inflate the menu; this adds items to the
action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}

3. Programa 2
package com.example.programa2;
import android.os.Bundle; import
android.app.Activity; import
android.view.Menu; import
android.view.View; import
android.widget.EditText; import
android.widget.TextView; public class
MainActivity extends Activity {
@Override protected void
onCreate(Bundle savedInstanceState)
{ super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mai
n); } @Override public boolean
onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to

4. the action bar if it is present.
getMenuInflater().inflate(R.menu.mai
n, menu); return true; } public void
sumar (View view){ EditText
et1=(EditText)
findViewById(R.id.num1); EditText
et2=(EditText) findViewById
(R.id.num2); TextView sol=(TextView)
findViewById (R.id.res); double
n1=Double.parseDouble(et1.getText().
toString()); double
n2=Double.parseDouble(et2.getText().
toString()); double r; r=n1+n2:
sol.setText(String.valueOf("El
resultado de "+n1+" + "+n2+" = "+r)); }
}