Preferences

Question 1

a Java class implements ?? for understanding the changes in the shared preferences

Answer 1

OnSharedPreferenceChangeListener

Question 2

How should we add an edit text preferences:

Answer 2

//in setSummary
 if (preference instanceof EditTextPreference) {
            // For EditTextPreferences, set the summary to the value's simple string representation.
            preference.setSummary(value);
        }

Question 3

We wanna make a list preference! What should we add in the XML resource file?

Answer 3

entries, entryValues
for example:

Add a res->values->arrays.xml file which contains two arrays, one for
labels and one for values. The arrays should contain strings found in this file–>

Question 4

What kinda theme should we add for adding preference?

Answer 4

preferenceTheme added to styles.XML like this:

@style/PreferenceThemeOverlay

Question 5

Can we find a preference by Key?

Answer 5

Yes we do!

Preference preference = findPreference(key);

Question 6

How do you register a SharedPreferenceChangedListener? What do you Register it to?

Answer 6

getPreferenceScreen().getSharedPreferences()

.registerOnSharedPreferenceChangeListener(this);

Question 7

How to get the number of preferences?

Answer 7

PreferenceScreen prefScreen = getPreferenceScreen();

int count = prefScreen.getPreferenceCount();