Mostrando entradas con la etiqueta tabla de multiplicar. Mostrar todas las entradas
Mostrando entradas con la etiqueta tabla de multiplicar. Mostrar todas las entradas

sábado, 18 de enero de 2014

Aplicación Android Tabla de multiplicar [Código Fuente/Source Code] – Miami – Curso – Credit


En una entrada escribí sobre laAplicación Android Tabla de multiplicar + apk, en ésta ocasión colocaré el código fuente de ésta aplicación, pueden revisarlo para ver como funciona, también modificarlo.

MainActivity.java
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import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {
private EditText et1;
private EditText et2;

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

et1=(EditText)findViewById(R.id.et1);
et2=(EditText)findViewById(R.id.et2);
}

@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;
}

public void ImpTabla(View v){
String numero1 = et1.getText().toString();
int numero2 = Integer.parseInt(numero1);
String result2 = "";
for(int i = 1; i = 12; i++){
int result1 = i * numero2;
result2 += i+ " x " + numero1 + " = " + String.valueOf(result1) + '\n';
}
et2.setText(result2);
}

}

Inicialmenteasociamos nuestras variables et1 y et2 del tipo EditText a los controles EditText creados en el xml.


et1=(EditText)findViewById(R.id.et1);


et2=(EditText)findViewById(R.id.et2);


Luego el métodoImpTabla se encargará de realizar las operaciones necesarias e imprimir la salida en elcontrol EditText.

Se debe recordar que cuando tomamos un dato que hemos escrito en un control EditText éste dato es del tipo String, por ello debemos almacenarlo en una variable de éste mismo tipo de dato y luego convertirla en un entero.


String numero1= et1.getText().toString();


int numero2= Integer.parseInt(numero1);


Las 2 lineas anteriores muestran lo antes mencionado. Se almacena el dato en la variable numero 1 que es de tipo string y luego es transformada en tipo entero y almacenada en la variable numero2.

El ciclo for empezará desde 1 debido a que la tabla de multiplicar irá desde 1 hasta 12.

int result1 = i * numero2;

La variable result1 almacena las operaciones para luego imprimir el resultado es decir: 1 * 5 = 5, 2 * 5 = 10 ... 12 * 5 = 60.

Y finalmente

result2 += i+ " x " + numero1 + " = " + String.valueOf(result1) + '\n';

Almacena todos los resultados en la variable result 2concatenandolos con el operador+= y'\n'se encargará de separar las operaciones y los resultados con un salto de linea.

activity_main.xml
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RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"

TextView
android:id="@+id/tv1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="¿Que tabla de multiplicar deseas saber?" /

EditText
android:id="@+id/et1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/tv1"
android:layout_marginTop="22dp"
android:ems="10"

requestFocus /
/EditText

Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/et1"
android:onClick="ImpTabla"
android:text="Aceptar" /

EditText
android:id="@+id/et2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/button1"
android:layout_marginTop="21dp"
android:ems="10"
android:inputType="textMultiLine" /

/RelativeLayout

En el control Button esimportante definir lapropiedadonclick del botón, ésta se encargará de activar el métodoImpTablacuando pulsemos el botón mientras nuestra aplicación se esté ejecutando.

android:onClick="ImpTabla"

Entre comillas debe ir el nombre del método que deseamos activar al pulsar el botón.

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sábado, 11 de enero de 2014

Aplicación Android Tabla de multiplicar + apk – dinero – Justicia – programmers


He estado leyendo y aprendiendo un poco sobredesarrollo de aplicaciones Android con el Android SDK (Kit de desarrollo de software de Android) y me animé a hacer una primera aplicación usando lo ya aprendido.

Ésta es una aplicación para Android la cual nos muestra la tabla de multiplicar del numero que ingresemos. Si lo desean pueden pasarse por la siguiente entrada del blog:"[Ejercicio resuelto Java] Tabla de multiplicar" de hecho recicle parte del código fuente mencionado en esta entrada para realizar esta aplicación.

ScreenCapture de la aplicación:


Sí desean descargarla lo pueden hacer mediante el siguiente link:
http://www.mediafire.com/download/lfgegnbsl7i5ppp/TablaDeMultiplicar.apk

Haré lo posible para seguir aprendiendo más, también próximamente espero colocar tutoriales de desarrollo de aplicaciones en Android y quizás algunos videos tutoriales. Gracias por leer la entrada.

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viernes, 3 de enero de 2014

[Ejercicio resuelto Java] Tabla de multiplicar – Settlement – Credit


Enunciado:
"Confeccionar un programa que permita ingresar un valor del 1 al 10 y nos muestre la tabla de multiplicar del mismo (los primeros 12 términos)
Ejemplo: Si ingreso 3 deberá aparecer en pantalla los valores 3, 6, 9, hasta el 36."

TablaMult.Java
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import java.util.Scanner;

public class tablaMult {
public static void main(String [] args){
Scanner tec = new Scanner(System.in);
int numero, result;
System.out.println("Si usted ingresa un valor entero (entre 1 y 10 preferiblemente), se le mostrará la tabla de multiplicar de dicho numero.");
numero = tec.nextInt();
System.out.println("--- Tabla del numero " + numero + " ---");
for(int i = 1; i = 12; i++){
result = i * numero;
System.out.println(i + " x " + numero + " = " + result);
}
}
}

Explicación:
Declaramos las variablesnúmero yresult, la variablenúmero será la tabla de multiplicar que imprimiremos, yresultel resultado de cada multiplicación en la tabla. El ciclo for se encargará de imprimir los resultados uno tras otro.

Salida:


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