What to do on TransactionTooLargeException

Question

I got a TransactionTooLargeException. Not reproducible. In the docs it says

The Binder transaction failed because it was too large.

D

Answer 1

For me it was also the FragmentStatePagerAdapter, however overriding saveState() did not work. Here's how I fixed it:

When calling the FragmentStatePagerAdapter constructor, keep a separate list of fragments within the class, and add a method to remove the fragments:

class PagerAdapter extends FragmentStatePagerAdapter {
    ArrayList items;

    PagerAdapter(ArrayList frags) {
        super(getFragmentManager()); //or getChildFragmentManager() or getSupportFragmentManager()
        this.items = new ArrayList<>();
        this.items.addAll(frags);
    }

    public void removeFragments() {
        Iterator iter = items.iterator();

        while (iter.hasNext()) {
            Fragment item = iter.next();
                getFragmentManager().beginTransaction().remove(item).commit();
                iter.remove();
            }
            notifyDataSetChanged();
        }
    }
    //...getItem() and etc methods...
}

Then in the Activity, save the ViewPager position and call adapter.removeFragments() in the overridden onSaveInstanceState() method:

private int pagerPosition;

@Override
public void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    //save other view state here
    pagerPosition = mViewPager.getCurrentItem();
    adapter.removeFragments();
}

Lastly, in the overridden onResume() method, re-instantiate the adapter if it isn't null. (If it's null, then the Activity is being opened for the first time or after the app has been killed off by Android, in which onCreate will do the adapter creation.)

@Override
public void onResume() {
    super.onResume();
    if (adapter != null) {
        adapter = new PagerAdapter(frags);
        mViewPager.setAdapter(adapter);
        mViewPager.setCurrentItem(currentTabPosition);
    }
}