TwoStatePreference

Kotlin |Java

public abstract class TwoStatePreference
extends Preference

java.lang.Object
↳	androidx.preference.Preference
	↳	androidx.preference.TwoStatePreference

Known direct subclasses

CheckBoxPreference, SwitchPreference, SwitchPreferenceCompat

CheckBoxPreference	A `Preference` that provides checkbox widget functionality.
SwitchPreference	A `Preference` that provides a two-state toggleable option.
SwitchPreferenceCompat	A `Preference` that provides a two-state toggleable option.

Common base class for preferences that have two selectable states, save a boolean value, and may have dependent preferences that are enabled/disabled based on the current state.

Summary

Inherited constants

From class androidx.preference.Preference

int

DEFAULT_ORDER

Specify for setOrder(int) if a specific order is not required.

Fields
`protected boolean`	`mChecked`

Public constructors
`TwoStatePreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)`
`TwoStatePreference(Context context, AttributeSet attrs, int defStyleAttr)`
`TwoStatePreference(Context context, AttributeSet attrs)`
`TwoStatePreference(Context context)`

Public methods
`boolean`	`getDisableDependentsState()` Returns whether dependents are disabled when this preference is on (`true`) or when this preference is off (`false`).
`CharSequence`	`getSummaryOff()` Returns the summary to be shown when unchecked.
`CharSequence`	`getSummaryOn()` Returns the summary to be shown when checked.
`boolean`	`isChecked()` Returns the checked state.
`void`	`setChecked(boolean checked)` Sets the checked state and saves it.
`void`	`setDisableDependentsState(boolean disableDependentsState)` Sets whether dependents are disabled when this preference is on (`true`) or when this preference is off (`false`).
`void`	`setSummaryOff(CharSequence summary)` Sets the summary to be shown when unchecked.
`void`	`setSummaryOff(int summaryResId)`
`void`	`setSummaryOn(int summaryResId)`
`void`	`setSummaryOn(CharSequence summary)` Sets the summary to be shown when checked.
`boolean`	`shouldDisableDependents()` Checks whether this preference's dependents should currently be disabled.

Protected methods
`void`	`onClick()` Processes a click on the preference.
`Object`	`onGetDefaultValue(TypedArray a, int index)` Called when a preference is being inflated and the default value attribute needs to be read.
`void`	`onRestoreInstanceState(Parcelable state)` Hook allowing a preference to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
`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`	`onSetInitialValue(Object defaultValue)` Implement this to set the initial value of the preference.
`void`	`syncSummaryView(PreferenceViewHolder holder)` Sync a summary holder contained within holder's sub-hierarchy with the correct summary text.

Inherited methods

From class


        
          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(Preference another)` Compares preference objects based on order (if set), otherwise alphabetically on the titles.
`<T extends Preference> T`	`findPreferenceInHierarchy(String key)` Finds a preference in the entire hierarchy (above or below this preference) with the given key.
`Context`	`getContext()` Returns the `Context` of this preference.
`String`	`getDependency()` Returns the key of the dependency on this preference.
`Bundle`	`getExtras()` Return the extras Bundle object associated with this preference, creating a new Bundle if there currently isn't one.
`String`	`getFragment()` Return the fragment class name associated with this preference.
`Drawable`	`getIcon()` Returns the icon of this preference.
`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.
`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).
`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.
`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.
`PreferenceDataStore`	`getPreferenceDataStore()` Returns `PreferenceDataStore` used by this preference.
`PreferenceManager`	`getPreferenceManager()` Gets the `PreferenceManager` that manages this preference object's tree.
`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.
`CharSequence`	`getSummary()` Returns the summary of this preference.
`final SummaryProvider`	`getSummaryProvider()` Returns the `Preference.SummaryProvider` used to configure the summary of this preference.
`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`	`isEnabled()` Checks whether this preference should be enabled in the list.
`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`	`notifyDependencyChange(boolean disableDependents)` Notifies any listening dependents of a change that affects the dependency.
`void`	`notifyHierarchyChanged()` Should be called when a preference has been added/removed from this group, or the ordering should be re-evaluated.
`void`	`onAttached()` Called when the preference hierarchy has been attached to the list of preferences.
`void`	`onAttachedToHierarchy(PreferenceManager preferenceManager)` Called when this preference has been attached to a preference hierarchy.
`void`	`onBindViewHolder(PreferenceViewHolder holder)` Binds the created View to the data for this preference.
`void`	`onClick()` Processes a click on the preference.
`void`	`onDependencyChanged(Preference dependency, boolean disableDependent)` Called when the dependency changes.
`void`	`onDetached()` Called when the preference hierarchy has been detached from the list of preferences.
`Object`	`onGetDefaultValue(TypedArray a, int index)` Called when a preference is being inflated and the default value attribute needs to be read.
`void`	`onInitializeAccessibilityNodeInfo(AccessibilityNodeInfoCompat info)` This method is deprecated. Preferences aren't views. They should not need any accessibility changes, unless the view hierarchy is customized. In this situation, please add Accessibility information in `onBindViewHolder(PreferenceViewHolder)`.
`void`	`onParentChanged(Preference parent, boolean disableChild)` Called when the implicit parent dependency changes.
`void`	`onPrepareForRemoval()` Called when this preference is being removed from the hierarchy.
`void`	`onRestoreInstanceState(Parcelable state)` Hook allowing a preference to re-apply a representation of its internal state that had previously been generated by `onSaveInstanceState()`.
`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`	`onSetInitialValue(Object defaultValue)` Implement this to set the initial value of the preference.
`void`	`onSetInitialValue(boolean restorePersistedValue, Object defaultValue)` This method is deprecated. Use `onSetInitialValue(Object)` instead.
`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(Bundle container)` Restore this preference hierarchy's previously saved state from the given container.
`void`	`saveHierarchyState(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(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(String fragment)` Sets the class name of a fragment to be shown when this preference is clicked.
`void`	`setIcon(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(Intent intent)` Sets an `Intent` to be used for `Context.startActivity(Intent)` 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(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(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(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(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(SummaryProvider summaryProvider)` Set a `Preference.SummaryProvider` that will be invoked whenever the summary of this preference is requested.
`void`	`setTitle(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`	`shouldDisableDependents()` Checks whether this preference's dependents should currently be disabled.
`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.
`String`	`toString()`

From class


        
          java.lang.Object

`Object`	`clone()`
`boolean`	`equals(Object arg0)`
`void`	`finalize()`
`final Class<?>`	`getClass()`
`int`	`hashCode()`
`final void`	`notify()`
`final void`	`notifyAll()`
`String`	`toString()`
`final void`	`wait(long arg0, int arg1)`
`final void`	`wait(long arg0)`
`final void`	`wait()`

From interface


        
          java.lang.Comparable

abstract int compareTo(Preference arg0)

Fields

mChecked

protected boolean mChecked

Public constructors

TwoStatePreference

public TwoStatePreference (Context context, 
                AttributeSet attrs, 
                int defStyleAttr, 
                int defStyleRes)

Parameters
`context`	`Context`
`attrs`	`AttributeSet`
`defStyleAttr`	`int`
`defStyleRes`	`int`

TwoStatePreference

public TwoStatePreference (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

Parameters
`context`	`Context`
`attrs`	`AttributeSet`
`defStyleAttr`	`int`

TwoStatePreference

public TwoStatePreference (Context context, 
                AttributeSet attrs)

Parameters
`context`	`Context`
`attrs`	`AttributeSet`

TwoStatePreference

public TwoStatePreference (Context context)

Parameters
`context`	`Context`

Public methods

getDisableDependentsState

public boolean getDisableDependentsState ()

Returns whether dependents are disabled when this preference is on (true) or when this preference is off (false).

Returns
`boolean`	Whether dependents are disabled when this preference is on (`true`) or when this preference is off (`false`).

getSummaryOff

public CharSequence getSummaryOff ()

Returns the summary to be shown when unchecked.

Returns
`CharSequence`	The summary

getSummaryOn

public CharSequence getSummaryOn ()

Returns the summary to be shown when checked.

Returns
`CharSequence`	The summary

isChecked

public boolean isChecked ()

Returns the checked state.

Returns
`boolean`	The checked state

setChecked

public void setChecked (boolean checked)

Sets the checked state and saves it.

Parameters
`checked`	`boolean`: The checked state

setDisableDependentsState

public void setDisableDependentsState (boolean disableDependentsState)

Sets whether dependents are disabled when this preference is on (true) or when this preference is off (false).

Parameters
`disableDependentsState`	`boolean`: The preference state that should disable dependents

setSummaryOff

public void setSummaryOff (CharSequence summary)

Sets the summary to be shown when unchecked.

For more complex configuration of this preference's summary, you should use a Preference.SummaryProvider

Parameters
`summary`	`CharSequence`: The summary to be shown when unchecked

setSummaryOff

public void setSummaryOff (int summaryResId)

Parameters
`summaryResId`	`int`: The summary as a resource

See also:

setSummaryOff(CharSequence)

setSummaryOn

public void setSummaryOn (int summaryResId)

Parameters
`summaryResId`	`int`: The summary as a resource

See also:

setSummaryOn(CharSequence)

setSummaryOn

public void setSummaryOn (CharSequence summary)

Sets the summary to be shown when checked.

For more complex configuration of this preference's summary, you should use a Preference.SummaryProvider

Parameters
`summary`	`CharSequence`: The summary to be shown when checked

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

Protected methods

onClick

protected void onClick ()

Processes a click on the preference. This includes saving the value to the SharedPreferences. However, the overridden method should call callChangeListener(Object) to make sure the client wants to update the preference's state with the new value.

onGetDefaultValue

protected Object onGetDefaultValue (TypedArray a, 
                int index)

Called when a preference is being inflated and the default value attribute needs to be read. Since different preference types have different value types, the subclass should get and return the default value which will be its value type.

For example, if the value type is String, the body of the method would proxy to TypedArray.getString(int).

Parameters
`a`	`TypedArray`: The set of attributes
`index`	`int`: The index of the default value attribute

Returns
`Object`	The default value of this preference type

onRestoreInstanceState

protected void onRestoreInstanceState (Parcelable state)

Hook allowing a preference to re-apply a representation of its internal state that had previously been generated by onSaveInstanceState(). This function will never be called with a null state.

Parameters
`state`	`Parcelable`: The saved state that had previously been returned by `onSaveInstanceState()`.

onSaveInstanceState

protected 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. This state should only contain information that is not persistent or can be reconstructed later.

Returns
`Parcelable`	A Parcelable object containing the current dynamic state of this preference, or `null` if there is nothing interesting to save. The default implementation returns `null`.

onSetInitialValue

protected void onSetInitialValue (Object defaultValue)

Implement this to set the initial value of the preference.

If you are persisting values to SharedPreferences or a PreferenceDataStore you should restore the saved value for the preference.

If you are not persisting values, or there is no value saved for the preference, you should set the value of the preference to defaultValue.

Parameters
`defaultValue`	`Object`: The default value for the preference if set, otherwise `null`.

syncSummaryView

protected void syncSummaryView (PreferenceViewHolder holder)

Sync a summary holder contained within holder's sub-hierarchy with the correct summary text.

Parameters
`holder`	`PreferenceViewHolder`: A `PreferenceViewHolder` which holds a reference to the summary view