The PreferenceScreen object should be at the top of the preference hierarchy. First not that you have to create a to specifying the hierarchy. There are a large number of example preferences shown in the preference.xml example. You should just set up a new folder call it xml and the create preference.xml and save it there. ![]() The preference.xml file is set up in "res/xml". To retrieve an instance of SharedPreferences that the preference hierarchy in this fragment will use, call PreferenceManager.getDefaultSharedPreferences() with a context in the same package as this fragment. These preferences will automatically save to SharedPreferences (which we discussed earlier in the course) as the user interacts with them. PreferenceFragmentCompat contains a hierarchy of preference objects as lists. This is a simple and powerful way to handle system preferences. When the user interacts with the fragment there is no code needed to create dialogs or new screens to handle input from the user or storage. The example we discuss below does 90% of the work in XML and very little code. It is easy to create a hierarchy of preferences (that can be shown on multiple screens) via XML. Android supports PreferfenceActivity and PreferenceFragmentCompat to edit and store preferences. Download the demo the fragmentpreference.zip app specifically designed to go with these notes.Įarlier on we used the SharedPreference to store data using key-value pairs.For more information see: PreferenceFragmentCompat Checkout the demo project The code used in this demo comes form the Android developers site. Preference hierarchy specified in an XML.Demo project - PreferenceFragmentCompat app.Most applications we use today on the laptop and phone from the common or garden browser to specialized activity app (Nike+) allow users to personalize the app using user of system preferences which need to be updated and stored persistently. ![]() ![]() Using PreferenceFragmentCompat to Store User Preferences
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