Android set default value of ListPrefrence dynamically created and filled

Question

I need to set default value for the ListPreference that is created dynamically. It's dynamically created because it's a preference for camera focus modes and each device can have different set of focus modes. listPreferenceFocusMode.setDefaultValue(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE); does not work, or How to set the Default Value of a ListPreference accepted answer in this link does not work, and it' is not right because it overrides user's selection.

    // Preview Focus Mode
    int indexContinuous = 0;
    if (focusModes != null && focusModes.size() > 0) {
        entries = new String[focusModes.size()];
        entryValues = new String[focusModes.size()];
        for (int i = 0; i < focusModes.size(); i++) {
            entryValues[i] = entries[i] = focusModes.get(i);
            if (entryValues[i].equals(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
                indexContinuous = i;
            }
        }

        listPreferenceFocusMode.setEntries(entries);
        listPreferenceFocusMode.setEntryValues(entryValues);

        if (listPreferenceFocusMode.getValue() == null) {
            listPreferenceFocusMode.setValueIndex(indexContinuous);
        }
        if (focusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE)) {
            listPreferenceFocusMode.setDefaultValue(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
        } else {
              listPreferenceFocusMode.setDefaultValue(Camera.Parameters.FOCUS_MODE_AUTO);
        }
    } else {
        listPreferenceFocusMode.setEnabled(false);
        listPreferenceFocusMode.setSummary("Focus Modes are not supported");
    }

I tried setting defaultValue or getting value using listPreferenceFocusMode.getValue() but it does not work also because listPreferenceFocusMode.getValue() is not null. Thanks in advance.

score 0 · Answer 1 · answered Jan 09 '17 at 18:13

I solved it using a boolean flag to check that if it's the first start of the application. If it is, set listPreferenceFocusMode.setValueIndex(indexContinuous); and set true and save isFirstStart flag to sharedPrefrerences to invoke setValueIndex method only once. It would be better if listPrefrence remembered it's dynamic default value but it does not.

Android set default value of ListPrefrence dynamically created and filled

1 Answers1