AIR for Android - actionscript 3, back button

I don't understand what you mean? Is there no code I can edit? So far for the swipe gesture, the code I am using is:

/* Swipe to Go to Next/Previous Frame and Stop

Swiping the stage moves the playhead to the next/previous frame and stops the movie.

*/

Multitouch.inputMode = MultitouchInputMode.GESTURE;

var currentGalleryItem:Number = 1;

var totalGalleryItems:Number = 16;

stage.addEventListener (TransformGestureEvent.GESTURE_SWIPE, fl_SwipeToGoToNextPreviousFrame);

function fl_SwipeToGoToNextPreviousFrame(event:TransformGestureEvent):void

{

          if(event.offsetX == 1)

          {

                    if(currentGalleryItem > 1){

                              currentGalleryItem--;

                              slideRight();

                    }

          }

          else if(event.offsetX == -1)

          {

                    if(currentGalleryItem < totalGalleryItems){

                              currentGalleryItem++;

                              slideLeft();

                    }

          }

}

var slideCounter:Number = 0;

function slideLeft(){

          gallery_items.addEventListener("enterFrame", moveGalleryLeft);

}

function slideRight(){

          gallery_items.addEventListener("enterFrame", moveGalleryRight);

}

function moveGalleryLeft(evt:Event){

          gallery_items.x -= 48;

          slideCounter++;

          if(slideCounter == 10){

                    gallery_items.removeEventListener("enterFrame", moveGalleryLeft);

                    slideCounter = 0;

          }

}

function moveGalleryRight(evt:Event){

          gallery_items.x += 48;

          slideCounter++;

          if(slideCounter == 10){

                    gallery_items.removeEventListener("enterFrame", moveGalleryRight);

                    slideCounter = 0;

          }

}