Update EditTextPreference Summary on Post SyncTask

Question

In my app once user provide three inputs, AsyncTask starts which connects to the server and gets info for two more fields. Once AsyncTask is finished, I want to set those two received values in opened setting page.

I searched and try this code, but not updating summary for fields for which value has fetched from server.

Problem is I'm not able to set values received from server as summary to EditTextPreference. If I reopen settngs page it shows value not without reopening.

@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
    updatePreference(key);
}

private void updatePreference(String key) {
    if (key.equals("id")) {
        Preference preference = findPreference(key);
        if (preference instanceof EditTextPreference) {
            EditTextPreference editTextPreference = (EditTextPreference) preference;
            if (editTextPreference.getText().trim().length() > 0) {
                editTextPreference.setSummary(editTextPreference.getText());   
            } else {
                editTextPreference.setSummary("");
            }
        }

    } else if (key.equals("sclass")) {
        Preference preference = findPreference(key);
        if (preference instanceof EditTextPreference) {
            EditTextPreference editTextPreference = (EditTextPreference) preference;
            if (editTextPreference.getText().trim().length() > 0) {
                editTextPreference.setSummary(editTextPreference.getText());
                                    } else {
                editTextPreference.setSummary("");
            }
        }
    }
}

You mean does that gets update if you close the app and reopen or does it never update? — Charuක, Jan 07 '17 at 13:05
gets updated summary in edittextpreference if I reopen setting page. — Panache, Jan 07 '17 at 13:09
so you want to display the changes without reopening ? right? — Charuක, Jan 07 '17 at 13:11
yes, I want to update summary so that user can see result. is it possible? — Panache, Jan 07 '17 at 13:17
of course show me where your listener is if my answer didn't work for you. — Charuක, Jan 07 '17 at 13:18
have you used `sharedPrefYourObj.registerOnSharedPreferenceChangeListener(this);` — Charuක, Jan 07 '17 at 13:29
Possible duplicate of [How do I display the current value of an Android Preference in the Preference summary?](http://stackoverflow.com/questions/531427/how-do-i-display-the-current-value-of-an-android-preference-in-the-preference-su) — Charuක, Jan 07 '17 at 14:06
if it helps you can accept my answer :)) anyway glad it helped — Charuක, Jan 07 '17 at 14:17

Charuක · Answer 1 · 2017-01-07T13:31:57.077

0

Create a listener and call it in your onCreate

sharedPrefYourObj.registerOnSharedPreferenceChangeListener(t‌his);

try to register you listener onResume and unregister it onPause though rather than onCreate!

example :

  protected void onResume() {
        super.onResume();
        getPreferenceScreen().getSharedPreferences()
                .registerOnSharedPreferenceChangeListener(this);
    }

    protected void onPause() {
        super.onPause();
        getPreferenceScreen().getSharedPreferences()
                .unregisterOnSharedPreferenceChangeListener(this);
    }

edited Jan 07 '17 at 13:31

answered Jan 07 '17 at 13:15

Charuක

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I applied listener as per your guidance, It was already on resume but I added for pause as u suggested to unregister. Solution did not work. – Panache Jan 07 '17 at 13:34
@Panache do you have a listener in your onCreate – Charuක Jan 07 '17 at 13:34
public class FinalSettings extends PreferenceActivity implements SharedPreferences.OnSharedPreferenceChangeListener { – Panache Jan 07 '17 at 13:35
do I still need to add it oncreate? – Panache Jan 07 '17 at 13:35
@Panache you only implements the methods in that way.. you need to listen changes ..add a listener like this in your oncreate and see `SharedPreferences sharedPref = getPreferenceScreen().getSharedPreferences(); sharedPref.registerOnSharedPreferenceChangeListener(this);` – Charuක Jan 07 '17 at 13:37
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.SharedPreferences android.preference.PreferenceScreen.getSharedPreferences()' on a null object reference. Got this error after adding your line in oncreate. – Panache Jan 07 '17 at 13:46

Update EditTextPreference Summary on Post SyncTask

1 Answers1