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Aprendizaje SCBIO Android. Lee y muestra por pantalla los valores de las preferencias escogidas por el usuario, almacenadas en el archivo .xml de data/data/[nombre del paquete]_preferences

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public void mostrarPreferencias(){
		SharedPreferences pref = getSharedPreferences("org.SCBIO.pacmanpropio_preferences", MODE_PRIVATE);
		String s="Música: "+pref.getBoolean("musica",true)+", iluminación: "+pref.getString("graficos","?")+
				", velocidad: "+pref.getString("velocidad","?")+", fantasmas: "+pref.getString("fantasmas","?");
		Toast.makeText(this, s, Toast.LENGTH_LONG).show();
				}

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