Show up/back button on android nested PreferenceScreen?

Question

I have a two level PreferenceScreen:

general settings
   
   more advanced sett         


        

Answer 1

This may be more work, but you could create two PreferenceAtivity files each with their own PreferenceFragment. Each PreferenceFragment will have its own PreferenceScreen XML (the first level screen, and the second. level screen). From the firsts level screen you launch the second PreferenceActivity with an Intent within the tag. In the second PreferenceActivity you can set the home icon by doing this:

ActionBar bar = getActionBar();
bar.setDisplayHomeAsUpEnabled(true);

and then also had a handler for the home button:

@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    if (item.getItemId() == android.R.id.home) {
        finish();
    }

    return false;
}

Assets:

FirstPreferenceActivty
FirstPreferenceFragment
pref_first.xml (layout with PreferenceScreen and Prefernce nodes)

SecondPreferenceActivty
SecondPreferenceFragment
pref_second.xml (layout with PreferenceScreen and Prefernce nodes)