Update existing Preference-item in a PreferenceActivity upon returning from a (sub)PreferenceScreen

Question

I have a PreferenceActivity with a bunch of (Sub)PreferenceScreens. Each such (Sub)PreferenceScreen represents an account and has the account-username as its title. ``` PreferenceScreen root = mgr.createPreferenceScreen(this); for (MyAccountClass account : myAccounts) { final PreferenceScreen accScreen = mgr.createPreferenceScreen(this); accScreen.setTitle(account.getUsername()); // add Preferences to the accScreen // (for instance a "change username"-preference) ... root.add(accScreen); } ``` As the user enters sub-PreferenceScreen, and edits the account user-name, I want the outer PreferenceScreen to update it's PreferenceScreen-title for the account in question. I've tried to add... ``` usernamePref.setOnPreferenceChangeListener(new OnPreferenceChangeListener() { public boolean onPreferenceChange(Preference preference, Object newValue) { accScreen.setTitle(newValue.toString()); return true; } }); ``` ...but the accScreen.setTitle does not seem to take effect on the outer Preference…

Accepted Answer

I found a solution to this. I have a hierarchy like this, each of these is a PreferenceScreen:

```
main settings
  -> users list
    -> user1 settings
    -> user2 settings
    ...
```

In the users list, title of the sub-screen is dependent on the user settings. Now when I create the user list, I store the list adapter to a variable in my PreferenceActivity.

```
 PreferenceScreen usersListScreen = ...
 userScreenListAdapter = (BaseAdapter)usersListScreen.getRootAdapter();
```

Now when userX-settings are edited, I set the titles in the usersListScreen and after that call:

```
userScreenListAdapter.notifyDataSetChanged();
```

which updates the list UI and the changes are visible.

Update existing Preference-item in a PreferenceActivity upon returning from a (sub)PreferenceScreen

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