PreferenceCategory


public class PreferenceCategory extends PreferenceGroup


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

Public methods

boolean

Checks whether this preference should be enabled in the list.

void

Binds the created View to the data for this preference.

boolean

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

Call this method after the user changes the preference, but before the internal state is set.

int

Compares preference objects based on order (if set), otherwise alphabetically on the titles.

@Nullable T

Finds a preference in the entire hierarchy (above or below this preference) with the given key.

@NonNull Context

Returns the Context of this preference.

@Nullable String

Returns the key of the dependency on this preference.

@NonNull Bundle

Return the extras Bundle object associated with this preference, creating a new Bundle if there currently isn't one.

@Nullable String

Return the fragment class name associated with this preference.

@Nullable Drawable

Returns the icon of this preference.

@Nullable Intent

Return the Intent associated with this preference.

String

Gets the key for this preference, which is also the key used for storing values into SharedPreferences or PreferenceDataStore.

final int

Gets the layout resource that will be shown as the View for this preference.

@Nullable Preference.OnPreferenceChangeListener

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

Returns the callback to be invoked when this preference is clicked.

int

Gets the order of this preference with respect to other preference objects on the same level.

@Nullable PreferenceGroup

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

Returns PreferenceDataStore used by this preference.

PreferenceManager

Gets the PreferenceManager that manages this preference object's tree.

@Nullable SharedPreferences

Returns the SharedPreferences where this preference can read its value(s).

boolean

Checks whether this preference should disable its view when it's action is disabled.

@Nullable CharSequence

Returns the summary of this preference.

final @Nullable Preference.SummaryProvider

Returns the SummaryProvider used to configure the summary of this preference.

@Nullable CharSequence

Returns the title of this preference.

final int

Gets the layout resource for the controllable widget portion of this preference.

boolean

Checks whether this preference has a valid key.

boolean

Returns whether the summary of this preference can be copied to the clipboard by long pressing on the preference.

boolean

Returns whether the space of this preference icon view is reserved.

boolean

Checks whether this preference is persistent.

boolean

Checks whether this preference should be selectable in the list.

final boolean

Checks whether this preference is shown to the user in the hierarchy.

boolean

Gets whether the title of this preference is constrained to a single line.

final boolean

Checks whether this preference should be visible to the user.

void

Should be called when the data of this Preference has changed.

void

Should be called when a preference has been added/removed from this group, or the ordering should be re-evaluated.

void

Called when this preference has been attached to a preference hierarchy.

void

Processes a click on the preference.

void
onDependencyChanged(
    @NonNull Preference dependency,
    boolean disableDependent
)

Called when the dependency changes.

@Nullable Object

Called when a preference is being inflated and the default value attribute needs to be read.

void

This method is deprecated.

Preferences aren't views.

void
onParentChanged(@NonNull Preference parent, boolean disableChild)

Called when the implicit parent dependency changes.

void

Called when this preference is being removed from the hierarchy.

void

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

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

Attempts to persist a String if this preference is persistent.

boolean

Attempts to persist a set of Strings if this preference is persistent.

void

Restore this preference hierarchy's previously saved state from the given container.

void

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

Sets the class name of a fragment to be shown when this preference is clicked.

void

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

Sets an Intent to be used for startActivity when this preference is clicked.

void

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

Sets the callback to be invoked when this preference is changed by the user (but before the internal state has been updated).

void

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

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

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

Set a SummaryProvider that will be invoked whenever the summary of this preference is requested.

void

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

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
From androidx.preference.PreferenceGroup
void

Called by the inflater to add an item to this group.

boolean

Adds a Preference at the correct position based on the preference's order.

void

Called by restoreHierarchyState to retrieve the saved state for this preference and its children.

void

Called by saveHierarchyState to store the instance for this preference and its children.

@Nullable T

Finds a Preference based on its key.

int

Gets the maximal number of children that are initially shown.

@NonNull Preference
getPreference(int index)

Returns the Preference at a particular index.

int

Returns the number of children Preferences.

boolean

Whether this preference group should be shown on the same screen as its contained preferences.

boolean

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

Called when the preference hierarchy has been attached to the list of preferences.

void

Called when the preference hierarchy has been detached from the list of preferences.

boolean

Prepares a Preference to be added to the group.

void

Hook allowing a preference to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState.

@NonNull Parcelable

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

Removes all Preferences from this group.

boolean

Removes a Preference from this group.

boolean

Recursively finds and removes a Preference from this group or a nested group lower down in the hierarchy.

void

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