PreferenceCategory

Artifact: androidx.preference:preference

Added in 1.0.0

Kotlin |Java

public class PreferenceCategory extends PreferenceGroup

java.lang.Object
↳	androidx.preference.Preference
	↳	androidx.preference.PreferenceGroup
		↳	androidx.preference.PreferenceCategory

A container that is used to group similar Preferences. A PreferenceCategory displays a category title and visually separates groups of Preferences.

Summary

Public constructors
`PreferenceCategory(@NonNull Context context)`
`PreferenceCategory(@NonNull Context context, @Nullable AttributeSet attrs)`
`PreferenceCategory( @NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr )`
`PreferenceCategory( @NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes )`

Public methods
`boolean`	`isEnabled()` Checks whether this preference should be enabled in the list.
`void`	`onBindViewHolder(@NonNull PreferenceViewHolder holder)` Binds the created View to the data for this preference.
`boolean`	`shouldDisableDependents()` Checks whether this preference's dependents should currently be disabled.

Inherited Constants

From androidx.preference.Preference

static final int

DEFAULT_ORDER = 2147483647

Specify for setOrder if a specific order is not required.

Inherited methods

From java.lang.Comparable

abstract int

compareTo(T p)

From androidx.preference.Preference

`boolean`	`callChangeListener(Object newValue)` Call this method after the user changes the preference, but before the internal state is set.
`int`	`compareTo(@NonNull Preference another)` Compares preference objects based on order (if set), otherwise alphabetically on the titles.
`@Nullable T`	`<T extends Preference> findPreferenceInHierarchy(@NonNull String key)` Finds a preference in the entire hierarchy (above or below this preference) with the given key.
`@NonNull Context`	`getContext()` Returns the `Context` of this preference.
`@Nullable String`	`getDependency()` Returns the key of the dependency on this preference.
`@NonNull Bundle`	`getExtras()` Return the extras Bundle object associated with this preference, creating a new Bundle if there currently isn't one.
`@Nullable String`	`getFragment()` Return the fragment class name associated with this preference.
`@Nullable Drawable`	`getIcon()` Returns the icon of this preference.
`@Nullable Intent`	`getIntent()` Return the `Intent` associated with this preference.
`String`	`getKey()` Gets the key for this preference, which is also the key used for storing values into `SharedPreferences` or `PreferenceDataStore`.
`final int`	`getLayoutResource()` Gets the layout resource that will be shown as the `View` for this preference.
`@Nullable Preference.OnPreferenceChangeListener`	`getOnPreferenceChangeListener()` Returns the callback to be invoked when this preference is changed by the user (but before the internal state has been updated).
`@Nullable Preference.OnPreferenceClickListener`	`getOnPreferenceClickListener()` Returns the callback to be invoked when this preference is clicked.
`int`	`getOrder()` Gets the order of this preference with respect to other preference objects on the same level.
`@Nullable PreferenceGroup`	`getParent()` Returns the `PreferenceGroup` which is this preference assigned to or `null` if this preference is not assigned to any group or is a root preference.
`boolean`	`getPersistedBoolean(boolean defaultReturnValue)` Attempts to get a persisted `Boolean` if this preference is persistent.
`float`	`getPersistedFloat(float defaultReturnValue)` Attempts to get a persisted `Float` if this preference is persistent.
`int`	`getPersistedInt(int defaultReturnValue)` Attempts to get a persisted `Integer` if this preference is persistent.
`long`	`getPersistedLong(long defaultReturnValue)` Attempts to get a persisted `Long` if this preference is persistent.
`String`	`getPersistedString(String defaultReturnValue)` Attempts to get a persisted set of Strings if this preference is persistent.
`Set<String>`	`getPersistedStringSet(Set<String> defaultReturnValue)` Attempts to get a persisted set of Strings if this preference is persistent.
`@Nullable PreferenceDataStore`	`getPreferenceDataStore()` Returns `PreferenceDataStore` used by this preference.
`PreferenceManager`	`getPreferenceManager()` Gets the `PreferenceManager` that manages this preference object's tree.
`@Nullable SharedPreferences`	`getSharedPreferences()` Returns the `SharedPreferences` where this preference can read its value(s).
`boolean`	`getShouldDisableView()` Checks whether this preference should disable its view when it's action is disabled.
`@Nullable CharSequence`	`getSummary()` Returns the summary of this preference.
`final @Nullable Preference.SummaryProvider`	`getSummaryProvider()` Returns the `SummaryProvider` used to configure the summary of this preference.
`@Nullable CharSequence`	`getTitle()` Returns the title of this preference.
`final int`	`getWidgetLayoutResource()` Gets the layout resource for the controllable widget portion of this preference.
`boolean`	`hasKey()` Checks whether this preference has a valid key.
`boolean`	`isCopyingEnabled()` Returns whether the summary of this preference can be copied to the clipboard by long pressing on the preference.
`boolean`	`isIconSpaceReserved()` Returns whether the space of this preference icon view is reserved.
`boolean`	`isPersistent()` Checks whether this preference is persistent.
`boolean`	`isSelectable()` Checks whether this preference should be selectable in the list.
`final boolean`	`isShown()` Checks whether this preference is shown to the user in the hierarchy.
`boolean`	`isSingleLineTitle()` Gets whether the title of this preference is constrained to a single line.
`final boolean`	`isVisible()` Checks whether this preference should be visible to the user.
`void`	`notifyChanged()` Should be called when the data of this `Preference` has changed.
`void`	`notifyHierarchyChanged()` Should be called when a preference has been added/removed from this group, or the ordering should be re-evaluated.
`void`	`onAttachedToHierarchy(@NonNull PreferenceManager preferenceManager)` Called when this preference has been attached to a preference hierarchy.
`void`	`onClick()` Processes a click on the preference.
`void`	`onDependencyChanged( @NonNull Preference dependency, boolean disableDependent )` Called when the dependency changes.
`@Nullable Object`	`onGetDefaultValue(@NonNull TypedArray a, int index)` Called when a preference is being inflated and the default value attribute needs to be read.
`void`	`@CallSuper onInitializeAccessibilityNodeInfo(AccessibilityNodeInfoCompat info)` This method is deprecated. Preferences aren't views.
`void`	`onParentChanged(@NonNull Preference parent, boolean disableChild)` Called when the implicit parent dependency changes.
`void`	`onPrepareForRemoval()` Called when this preference is being removed from the hierarchy.
`void`	`onSetInitialValue(@Nullable Object defaultValue)` Implement this to set the initial value of the preference.
`void`	`onSetInitialValue(boolean restorePersistedValue, Object defaultValue)` This method is deprecated. Use `onSetInitialValue` instead.
`@Nullable Bundle`	`peekExtras()` Return the extras Bundle object associated with this preference, returning `null` if there is not currently one.
`boolean`	`persistBoolean(boolean value)` Attempts to persist a `Boolean` if this preference is persistent.
`boolean`	`persistFloat(float value)` Attempts to persist a `Float` if this preference is persistent.
`boolean`	`persistInt(int value)` Attempts to persist an `Integer` if this preference is persistent.
`boolean`	`persistLong(long value)` Attempts to persist a `Long` if this preference is persistent.
`boolean`	`persistString(String value)` Attempts to persist a `String` if this preference is persistent.
`boolean`	`persistStringSet(Set<String> values)` Attempts to persist a set of Strings if this preference is persistent.
`void`	`restoreHierarchyState(@NonNull Bundle container)` Restore this preference hierarchy's previously saved state from the given container.
`void`	`saveHierarchyState(@NonNull Bundle container)` Store this preference hierarchy's frozen state into the given container.
`void`	`setCopyingEnabled(boolean enabled)` Sets whether the summary of this preference can be copied to the clipboard by long pressing on the preference.
`void`	`setDefaultValue(Object defaultValue)` Sets the default value for this preference, which will be set either if persistence is off or persistence is on and the preference is not found in the persistent storage.
`void`	`setDependency(@Nullable String dependencyKey)` Sets the key of a preference that this preference will depend on.
`void`	`setEnabled(boolean enabled)` Sets whether this preference is enabled.
`void`	`setFragment(@Nullable String fragment)` Sets the class name of a fragment to be shown when this preference is clicked.
`void`	`setIcon(@Nullable Drawable icon)` Sets the icon for this preference with a Drawable.
`void`	`setIcon(int iconResId)` Sets the icon for this preference with a resource ID.
`void`	`setIconSpaceReserved(boolean iconSpaceReserved)` Sets whether to reserve the space of this preference icon view when no icon is provided.
`void`	`setIntent(@Nullable Intent intent)` Sets an `Intent` to be used for `startActivity` when this preference is clicked.
`void`	`setKey(String key)` Sets the key for this preference, which is used as a key to the `SharedPreferences` or `PreferenceDataStore`.
`void`	`setLayoutResource(int layoutResId)` Sets the layout resource that is inflated as the `View` to be shown for this preference.
`void`	`setOnPreferenceChangeListener( @Nullable Preference.OnPreferenceChangeListener onPreferenceChangeListener )` Sets the callback to be invoked when this preference is changed by the user (but before the internal state has been updated).
`void`	`setOnPreferenceClickListener( @Nullable Preference.OnPreferenceClickListener onPreferenceClickListener )` Sets the callback to be invoked when this preference is clicked.
`void`	`setOrder(int order)` Sets the order of this preference with respect to other preference objects on the same level.
`void`	`setPersistent(boolean persistent)` Sets whether this preference is persistent.
`void`	`setPreferenceDataStore(@Nullable PreferenceDataStore dataStore)` Sets a `PreferenceDataStore` to be used by this preference instead of using `SharedPreferences`.
`void`	`setSelectable(boolean selectable)` Sets whether this preference is selectable.
`void`	`setShouldDisableView(boolean shouldDisableView)` Sets whether this preference should disable its view when it gets disabled.
`void`	`setSingleLineTitle(boolean singleLineTitle)` Sets whether to constrain the title of this preference to a single line instead of letting it wrap onto multiple lines.
`void`	`setSummary(@Nullable CharSequence summary)` Sets the summary for this preference with a CharSequence.
`void`	`setSummary(int summaryResId)` Sets the summary for this preference with a resource ID.
`final void`	`setSummaryProvider(@Nullable Preference.SummaryProvider summaryProvider)` Set a `SummaryProvider` that will be invoked whenever the summary of this preference is requested.
`void`	`setTitle(@Nullable CharSequence title)` Sets the title for this preference with a CharSequence.
`void`	`setTitle(int titleResId)` Sets the title for this preference with a resource ID.
`void`	`setViewId(int viewId)` Set the ID that will be assigned to the overall View representing this preference, once bound.
`final void`	`setVisible(boolean visible)` Sets whether this preference should be visible to the user.
`void`	`setWidgetLayoutResource(int widgetLayoutResId)` Sets the layout for the controllable widget portion of this preference.
`boolean`	`shouldPersist()` Checks whether, at the given time this method is called, this preference should store/restore its value(s) into the `SharedPreferences` or into `PreferenceDataStore` if assigned.
`@NonNull String`	`toString()`

From androidx.preference.PreferenceGroup

`void`	`addItemFromInflater(@NonNull Preference preference)` Called by the inflater to add an item to this group.
`boolean`	`addPreference(@NonNull Preference preference)` Adds a `Preference` at the correct position based on the preference's order.
`void`	`dispatchRestoreInstanceState(@NonNull Bundle container)` Called by `restoreHierarchyState` to retrieve the saved state for this preference and its children.
`void`	`dispatchSaveInstanceState(@NonNull Bundle container)` Called by `saveHierarchyState` to store the instance for this preference and its children.
`@Nullable T`	`<T extends Preference> findPreference(@NonNull CharSequence key)` Finds a `Preference` based on its key.
`int`	`getInitialExpandedChildrenCount()` Gets the maximal number of children that are initially shown.
`@NonNull Preference`	`getPreference(int index)` Returns the `Preference` at a particular index.
`int`	`getPreferenceCount()` Returns the number of children `Preference`s.
`boolean`	`isOnSameScreenAsChildren()` Whether this preference group should be shown on the same screen as its contained preferences.
`boolean`	`isOrderingAsAdded()` Whether this group is ordering preferences in the order they are added.
`void`	`notifyDependencyChange(boolean disableDependents)` Notifies any listening dependents of a change that affects the dependency.
`void`	`onAttached()` Called when the preference hierarchy has been attached to the list of preferences.
`void`	`onDetached()` Called when the preference hierarchy has been detached from the list of preferences.
`boolean`	`onPrepareAddPreference(@NonNull Preference preference)` Prepares a `Preference` to be added to the group.
`void`	`onRestoreInstanceState(@Nullable Parcelable state)` Hook allowing a preference to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState`.
`@NonNull Parcelable`	`onSaveInstanceState()` Hook allowing a preference to generate a representation of its internal state that can later be used to create a new instance with that same state.
`void`	`removeAll()` Removes all `Preference`s from this group.
`boolean`	`removePreference(@NonNull Preference preference)` Removes a `Preference` from this group.
`boolean`	`removePreferenceRecursively(@NonNull CharSequence key)` Recursively finds and removes a `Preference` from this group or a nested group lower down in the hierarchy.
`void`	`setInitialExpandedChildrenCount(int expandedCount)` Sets the maximal number of children that are shown when the preference group is launched where the rest of the children will be hidden.
`void`	`setOrderingAsAdded(boolean orderingAsAdded)` Whether to order the `Preference` children of this group as they are added.

Public constructors

PreferenceCategory

Added in 1.0.0

public PreferenceCategory(@NonNull Context context)

PreferenceCategory

Added in 1.0.0

public PreferenceCategory(@NonNull Context context, @Nullable AttributeSet attrs)

PreferenceCategory

Added in 1.0.0

public PreferenceCategory(
    @NonNull Context context,
    @Nullable AttributeSet attrs,
    int defStyleAttr
)

PreferenceCategory

Added in 1.0.0

public PreferenceCategory(
    @NonNull Context context,
    @Nullable AttributeSet attrs,
    int defStyleAttr,
    int defStyleRes
)

Public methods

isEnabled

public boolean isEnabled()

Checks whether this preference should be enabled in the list.

Returns
`boolean`	`true` if this preference is enabled, false otherwise

onBindViewHolder

public void onBindViewHolder(@NonNull PreferenceViewHolder holder)

Binds the created View to the data for this preference.

This is a good place to grab references to custom Views in the layout and set properties on them.

Make sure to call through to the superclass's implementation.

Parameters
`@NonNull PreferenceViewHolder holder`	The ViewHolder that provides references to the views to fill in. These views will be recycled, so you should not hold a reference to them after this method returns.

shouldDisableDependents

public boolean shouldDisableDependents()

Checks whether this preference's dependents should currently be disabled.

Returns
`boolean`	`true` if the dependents should be disabled, otherwise false