Disable actionbar Up button

Question

I am trying to disable the Up button in the Support Actionbar on certain user actions. According to http://developer.android.com/reference/android/app/ActionBar.html#setHomeButtonEnabled(boolean) , setHomeButtonEnabled should do what I want. However, the button remains clickable. (I can disable the other icons in the actionbar without problem).

I am trying to disable it from a fragment. My code to disable is:

@Override
public void onPrepareOptionsMenu (Menu menu) {

    if (isUpdating) {


        getBaseActivity().getSupportActionBar().setHomeAsUpIndicator(getResources().getDrawable(R.drawable.ic_backgrey));
        getBaseActivity().getSupportActionBar().setHomeButtonEnabled(false);

        for (int i = 0; i < menu.size(); i++) {
            menu.getItem(i).setEnabled(false);
            menu.getItem(i).getIcon().setAlpha(64);
        }
    } else {

        getBaseActivity().getSupportActionBar().setHomeButtonEnabled(true);
        getBaseActivity().getSupportActionBar().setHomeAsUpIndicator(getResources().getDrawable(R.drawable.ic_back));
        for (int i = 0; i < menu.size(); i++) {
            menu.getItem(i).setEnabled(true);
            menu.getItem(i).getIcon().setAlpha(255);
        }
    }
}

and my code in activity onCreate is:

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeAsUpIndicator(getResources().getDrawable(R.drawable.ic_back));

and my Fragment onCreate contains setHasOptionsMenu(true)

Answer 1

In your fragment add

getBaseActivity().getSupportActionBar().setDisplayHomeAsUpEnabled(false);

and in your Activity add

getSupportActionBar().setDisplayHomeAsUpEnabled(false);

Answer 2

In oncreate() setDisplayHomeAsUpEnabled should be set to false as well.

  getSupportActionBar().setDisplayHomeAsUpEnabled(false);

http://developer.android.com/reference/android/app/ActionBar.html#setDisplayHomeAsUpEnabled(boolean)