Android : FragmentPagerAdapter add, remove and reorder fragments

I am using a ViewPager with FragmentStatePagerAdapter. My application requires me to add, remove and reorder the fragments like the user wants. I tried to implement this by overriding the getItem() and getItemPosition() functions.

My Method :

1. 
   

   Before the user begins, I store the initial position of each fragment as it's ID and use the setID() function to give each fragment it's ID.

   
   


2. 
   

   The user is taken to a different view where the user can add, remove and reorder the fragments as she/he wants.

   
   


3. 
   

   I map the new and old positions of the fragments using a sparse array.

   
   


4. 
   

   In the getItemPosition() function I use the fragment ID to get the corresponding new position in the sparse array or return position_none if the fragment was deleted.

   
   


5. 
   

   I have set the offset to high enough value to make sure fragments are not deleted while using viewpager.

   
   

The Problem : The sparse array is giving correct new positions , I have verified. The problem comes when I add a new blank fragment. Most of the time they are not even created and getItem() is never called. They are only created if I delete and add fragments only at the end and then do not reorder the new fragments.

I am starting to think it's not even allowed to do such a thing in the FragmentStatePagerAdapter class. But wanted to ask just in case anyone has a solution.

Here is my code:

The adapter :

private class SlidePageAdapter extends FragmentStatePagerAdapter{

    private boolean firstRun=true;
    public SlidePageAdapter(android.support.v4.app.FragmentManager fm) {
        super(fm);
    }


    @Override
    public android.support.v4.app.Fragment getItem(int position) {
        SlideFragment slideFragment;
        //On the first run no recycling of fragments happens.
        //On every run after the first getitem is only used to create blank                     fragments as old fragments are always recycled or deleted
        if(firstRun)
        {   //Create a fragment for this position
            slideFragment= new SlideFragment(position);
        }
        else
        {
            //Create a blank fragment
            slideFragment= new SlideFragment(-1);   
        }

        aliveFragments.append(position, slideFragment);
        if(aliveFragments.size()==(numOfFragments))
            firstRun=false;
        slideFragment.setID(position);
        return slideFragment;
    }

    @Override
    public int getCount() {
        return numOfFragments;
    }

    @Override
    public int getItemPosition(Object object) {

        SlideFragment fragment=(SlideFragment) object;
        Integer newPosition=newPositions.get(fragment.getID());
        if(newPosition!=null){
            aliveFragments.append(newPosition, fragment);
            fragment.setID(newPosition);
            return newPosition;
        }
        else
        {
            return POSITION_NONE;
        }


    }




}