oled bluetooth android

hi i have this code
and
hc 05 bluetooth
arduino uno
4 pin oled 128 x 64 (vcc gnd scl sda )
and android phone
now i want send some string with android phone bluetooth terminal

but i cant convert int to string pls help me
tnx

#include <Wire.h>
#include <OzOLED.h>
// OzOled.init(); //initialze Oscar OLED display
// OzOled.printString(“Hello World!”); //Print the String
int ledPin = 13;
int state = 0;
int flag = 0;

String myString = String(state);

void setup()
{
pinMode(ledPin, OUTPUT);
digitalWrite(ledPin, LOW);
digitalWrite(ledPin, HIGH);
Serial.begin(9600); // Default connection rate for my BT module

OzOled.init(); //initialze Oscar OLED display
OzOled.printString(“System On”); //Print the String
}
void loop()
{
if(Serial.available() > 0)
{
state = Serial.read();
flag=0;
}
if (state == ‘0’)
{
digitalWrite(ledPin, LOW);
if(flag == 0)
{
Serial.println(“LED: off”);
OzOled.init(); //initialze Oscar OLED display
OzOled.printString(“off!”); //Print the String
flag = 1;
}
}
else if (state == ‘1’)
{
digitalWrite(ledPin, HIGH);

if(flag == 0)
{
Serial.println(“LED: on”);
OzOled.init(); //initialze Oscar OLED display
//OzOled.printString(“Hello !”); //Print the String
OzOled.printString(“on”); //Print the String
flag = 1;
}
}

}