Open a Preference in Android Setting (preference) Activity

openPreference.java

private void openPreference(String key) {
        PreferenceScreen preferenceScreen = getPreferenceScreen();
        final ListAdapter listAdapter = preferenceScreen.getRootAdapter();

        final int itemsCount = listAdapter.getCount();
        int itemNumber;
        for (itemNumber = 0; itemNumber < itemsCount; ++itemNumber) {
            if (listAdapter.getItem(itemNumber).equals(findPreference(key))) {
                preferenceScreen.onItemClick(null, null, itemNumber, 0);
                break;
            }
        }
    }