Android : Avoid bitmap from being recycled automatically - Android

I am capturing screen whenever the screen is being touched and i am saving bitmaps in the ArrayList.

screen.setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View arg0, MotionEvent arg1) {
            count++;
            screen.setDrawingCacheEnabled(false);
            screen.setDrawingCacheEnabled(true);

            Bitmap b = screen.getDrawingCache();
            bitmapList.add(b);
            Log.e("Captured Image Number: ", ""+count);
            return false;
        }
    });

And afterwards when i try to access the bitmaps to save them, they are no more there, recycled!

What should i do?

If i save here, it takes very long time.

Tried to convert into byte[] to avoid recycling, it also took long then expected.

I want to keep it upto 15fps what should i do.