Settings, then you need separate XML files for each fragment. Note: If you want to create a multi-pane layout for your You usually need only one file,īecause branches in the hierarchy (that open their own list of settings) are declared using nested Although you can name the fileĪnything you want, it's traditionally named preferences.xml. You must save the XML file in the res/xml/ directory. Generally pre-determined, although you can still modify the collection at runtime.Įach Preference subclass can be declared with an XML element that Provides an easy-to-read structure that's simple to update. Using an XML file to define your collection of settings is preferred because the file Should define your list of settings in XML with a hierarchy of Preference Defining Preferences in XMLĪlthough you can instantiate new Preference objects at runtime, you For help doing so, see the section about Building a Custom Preference.
For example, the platform currently does not provide a Preference class for picking a number or a date. Of course, the built-in classes don't accommodate every need and your application might require See the Preference class for a list of all other subclasses and their EditTextPreference Opens a dialog with an EditText widget. The saved valueĬan be any one of the supported value types (listed above). ListPreference Opens a dialog with a list of radio buttons. Value is a boolean ( true if it's checked). Each list item in the settings screen is backed by a different Preference object.Ī few of the most common preferences are: CheckBoxPreference Shows an item with a checkbox for a setting that is either enabled or disabled. For instance, figure 1 shows a screenshot from Its own specialized properties and user interface. To specify things such as a title for the setting and the default value. Each subclass includes a set of core properties that allow you
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How to set up your PreferenceActivity and instances of PreferenceFragment is discussed in the sections about Creating a Preference Activity and UsingĮvery setting for your app is represented by a specific subclass of the Preference class. However, you can also use PreferenceActivity to create a two-pane layoutįor large screens when you have multiple groups of settings. That hosts a PreferenceFragment that displays your app settings.
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Opens an interface to change the setting. Selecting an item defined by a Preference Screenshots from the Android Messaging app's How to build your app settings using Preference APIs.įor information about how to design your settings, read the Settings design guide.įigure 1.
The user experience in other Android apps (including the system settings). If you want to provide settings for your app, you should useĪndroid's Preference APIs to build an interface that's consistent with ForĮxample, some apps allow users to specify whether notifications are enabled or specify how often the
Supporting older versions with preference headers.