Arduino windows code to Android application with bluetooth

I have an arduino project running on windows, and I want it to work with android. It connects the device trough bluetoogh, receive a value from 3 possibles and depending on the value apk shows a message. Stilish is not such a deal at this momment: connect button, result area and logo background to do at the end. I will release the first milestone when I test the apk, and the second payment with the source code. Here is the code it was used for windows: const int pin = 2; const int trigger = 3; volatile int contador = 0; volatile int contador_mostrar = 0; volatile bool bListo = false; int contador_anterior=0; unsigned long tiempo = 25.0; unsigned long tiemporeal= 0; char* ctexto=""; void ServicioBoton(){ delayMicroseconds(30); if (digitalRead(pin))contador++; } void Reloj(){ contador_mostrar=contador; contador=0; bListo=true; } void setup() { pinMode(pin, INPUT); pinMode(trigger, INPUT); [login to view URL](9600); attachInterrupt(digitalPinToInterrupt(pin), ServicioBoton, RISING); attachInterrupt(digitalPinToInterrupt(trigger),Reloj,CHANGE); } void loop() { if (bListo){ if (contador_anterior != contador_mostrar){ if (contador_mostrar <= 2) ctexto= "Invalida"; if (contador_mostrar == 3) ctexto= "Negativa"; if ((contador_mostrar >= 4) && (contador_mostrar <=5)) ctexto="Positiva"; contador_anterior=contador_mostrar; }//fin contador diferente al anterior bListo=false; }//fin listo if ([login to view URL]()){ [login to view URL] (ctexto); } }//fin void loop Here is the code