I am working on re-making my settings screen from a custom one (that looks pretty bad) into using the PreferenceScreen. I need to use a fragment, since i have the settings in one of my tabs.

You discuss this topic in the book, but i have only found topics related to moving between activities for sub-categories. However, i have made another homegrown solution with a “back” button and manually switching between the PreferenceScreens, since a lot of functionality in the “regular” Preferences library is missing in compat. 

It seems to work fine, but i am a bit anxious about having missed something, for example related to memory leaks.
I have made an SO thread about this, so i was wondering if you’d have time to skim through it and see if you can see any issues with my code, or if there is something i’m not thinking about?

but the basic gist is:

1. Store away the "root" PreferenceScreen in onCreatePreferences so that i can go back later.

2. When the user clicks on the sub-category, the framework will navigate to the subscreen, and onPreferenceStartScreen will be called. Set the back button to visible there.

3. When back button is clicked, call the "onPreferenceStartScreen" manually with the root PreferenceScreen, and hide the back button again.

This seems to work well for me. Obviously there's no back stack, but i can live with that, this fragment lives in a tabbed application.

public class SettingsFragment extends PreferenceFragmentCompat implements PreferenceFragmentCompat.OnPreferenceStartScreenCallback {

private Button back;
PreferenceScreen root;

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    /**doing other stuff here**/
    setupBackButton();
}

private void setupBackButton(){
    back = getView().findViewById(R.id.leftButton);
    back.setText(R.string.action_back);
...