<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<EditText
android:id="@+id/num1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Ingrese el primer numero" />
<EditText
android:id="@+id/num2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Ingrese el segundo numero" />
<Button
android:id="@+id/sumar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Sumar" />
<TextView
android:id="@+id/resultado"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Resultado" />
</LinearLayout>
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
private EditText num1;
private EditText num2;
private TextView resultado;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setContentView(R.layout.activity_main);
num1 = (EditText) findViewById(R.id.num1);
num2 = (EditText) findViewById(R.id.num2);
resultado = (TextView) findViewById(R.id.resultado);
Button sumar = (Button) findViewById(R.id.sumar);
sumar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int n1 = Integer.parseInt(num1.getText().toString());
int n2 = Integer.parseInt(num2.getText().toString());
int suma = n1 + n2;
resultado.setText("El resultado es: " + suma);
}
});
}
}
