ListPreference

Artifact: androidx.preference:preference

Added in 1.0.0

Kotlin |Java

public class ListPreference extends DialogPreference

java.lang.Object
↳	androidx.preference.Preference
	↳	androidx.preference.DialogPreference
		↳	androidx.preference.ListPreference

Known direct subclasses

DropDownPreference

DropDownPreference

A ListPreference that presents the options in a drop down menu rather than a dialog.

A Preference that displays a list of entries as a dialog.

This preference saves a string value. This string will be the value from the setEntryValues array.

name android:entries

name android:entryValues

Summary

Nested types
`public final class ListPreference.SimpleSummaryProvider implements Preference.SummaryProvider` A simple `androidx.preference.Preference.SummaryProvider` implementation for a `ListPreference`.

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

Public methods
`int`	`findIndexOfValue(String value)` Returns the index of the given value (in the entry values array).
`CharSequence[]`	`getEntries()` The list of entries to be shown in the list in subsequent dialogs.
`@Nullable CharSequence`	`getEntry()` Returns the entry corresponding to the current value.
`CharSequence[]`	`getEntryValues()` Returns the array of values to be saved for the preference.
`@Nullable CharSequence`	`getSummary()` Returns the summary of this preference.
`String`	`getValue()` Returns the value of the key.
`void`	`setEntries(CharSequence[] entries)` Sets the human-readable entries to be shown in the list.
`void`	`setEntries(@ArrayRes int entriesResId)`
`void`	`setEntryValues(CharSequence[] entryValues)` The array to find the value to save for a preference when an entry from entries is selected.
`void`	`setEntryValues(@ArrayRes int entryValuesResId)`
`void`	`setSummary(@Nullable CharSequence summary)` Sets the summary for this preference with a CharSequence.
`void`	`setValue(String value)` Sets the value of the key.
`void`	`setValueIndex(int index)` Sets the value to the given index from the entry values.

Protected methods
`Object`	`onGetDefaultValue(@NonNull TypedArray a, int index)` Called when a preference is being inflated and the default value attribute needs to be read.
`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`.
`@Nullable 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.

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.DialogPreference

`@Nullable Drawable`	`getDialogIcon()` Returns the icon to be shown on subsequent dialogs.
`int`	`getDialogLayoutResource()` Returns the layout resource that is used as the content view for subsequent dialogs.
`@Nullable CharSequence`	`getDialogMessage()` Returns the message to be shown on subsequent dialogs.
`@Nullable CharSequence`	`getDialogTitle()` Returns the title to be shown on subsequent dialogs.
`@Nullable CharSequence`	`getNegativeButtonText()` Returns the text of the negative button to be shown on subsequent dialogs.
`@Nullable CharSequence`	`getPositiveButtonText()` Returns the text of the positive button to be shown on subsequent dialogs.
`void`	`onClick()` Processes a click on the preference.
`void`	`setDialogIcon(@Nullable Drawable dialogIcon)` Sets the icon of the dialog.
`void`	`setDialogIcon(int dialogIconRes)` Sets the icon (resource ID) of the dialog.
`void`	`setDialogLayoutResource(int dialogLayoutResId)` Sets the layout resource that is inflated as the `View` to be shown as the content view of subsequent dialogs.
`void`	`setDialogMessage(@Nullable CharSequence dialogMessage)` Sets the message of the dialog.
`void`	`setDialogMessage(int dialogMessageResId)`
`void`	`setDialogTitle(@Nullable CharSequence dialogTitle)` Sets the title of the dialog.
`void`	`setDialogTitle(int dialogTitleResId)`
`void`	`setNegativeButtonText(@Nullable CharSequence negativeButtonText)` Sets the text of the negative button of the dialog.
`void`	`setNegativeButtonText(int negativeButtonTextResId)`
`void`	`setPositiveButtonText(@Nullable CharSequence positiveButtonText)` Sets the text of the positive button of the dialog.
`void`	`setPositiveButtonText(int positiveButtonTextResId)`

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.
`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`	`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(@NonNull PreferenceManager preferenceManager)` Called when this preference has been attached to a preference hierarchy.
`void`	`onBindViewHolder(@NonNull PreferenceViewHolder holder)` Binds the created View to the data for this preference.
`void`	`onDependencyChanged( @NonNull Preference dependency, boolean disableDependent )` Called when the dependency changes.
`void`	`onDetached()` Called when the preference hierarchy has been detached from the list of preferences.
`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(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(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`	`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.
`@NonNull String`	`toString()`

Public constructors

ListPreference

Added in 1.0.0

public ListPreference(@NonNull Context context)

ListPreference

Added in 1.0.0

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

ListPreference

Added in 1.0.0

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

ListPreference

Added in 1.0.0

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

Public methods

findIndexOfValue

Added in 1.0.0

public int findIndexOfValue(String value)

Returns the index of the given value (in the entry values array).

Parameters
`String value`	The value whose index should be returned

Returns
`int`	The index of the value, or -1 if not found

getEntries

Added in 1.0.0

public CharSequence[] getEntries()

The list of entries to be shown in the list in subsequent dialogs.

Returns
`CharSequence[]`	The list as an array

getEntry

Added in 1.0.0

public @Nullable CharSequence getEntry()

Returns the entry corresponding to the current value.

Returns
`@Nullable CharSequence`	The entry corresponding to the current value, or `null`

getEntryValues

Added in 1.0.0

public CharSequence[] getEntryValues()

Returns the array of values to be saved for the preference.

Returns
`CharSequence[]`	The array of values

getSummary

public @Nullable CharSequence getSummary()

Returns the summary of this preference. If a SummaryProvider has been set for this preference, it will be used to provide the summary returned by this method.

Returns
`@Nullable CharSequence`	The summary

See also
`setSummary`
`setSummaryProvider`

getValue

Added in 1.0.0

public String getValue()

Returns the value of the key. This should be one of the entries in getEntryValues.

Returns
`String`	The value of the key

setEntries

Added in 1.0.0

public void setEntries(CharSequence[] entries)

Sets the human-readable entries to be shown in the list. This will be shown in subsequent dialogs.

Each entry must have a corresponding index in setEntryValues.

Parameters
`CharSequence[] entries`	The entries

See also
`setEntryValues`

setEntries

Added in 1.0.0

public void setEntries(@ArrayRes int entriesResId)

Parameters
`@ArrayRes int entriesResId`	The entries array as a resource

See also
`setEntries`

setEntryValues

Added in 1.0.0

public void setEntryValues(CharSequence[] entryValues)

The array to find the value to save for a preference when an entry from entries is selected. If a user clicks on the second item in entries, the second item in this array will be saved to the preference.

Parameters
`CharSequence[] entryValues`	The array to be used as values to save for the preference

setEntryValues

Added in 1.0.0

public void setEntryValues(@ArrayRes int entryValuesResId)

Parameters
`@ArrayRes int entryValuesResId`	The entry values array as a resource

See also
`setEntryValues`

setSummary

public void setSummary(@Nullable CharSequence summary)

Sets the summary for this preference with a CharSequence.

You can also use a SummaryProvider to dynamically configure the summary of this preference.

Parameters
`@Nullable CharSequence summary`	The summary for the preference

Throws
`java.lang.IllegalStateException`	If a `SummaryProvider` has already been set.

See also
`setSummaryProvider`

setValue

Added in 1.0.0

public void setValue(String value)

Sets the value of the key. This should be one of the entries in getEntryValues.

Parameters
`String value`	The value to set for the key

setValueIndex

Added in 1.0.0

public void setValueIndex(int index)

Sets the value to the given index from the entry values.

Parameters
`int index`	The index of the value to set

Protected methods

onGetDefaultValue

protected Object onGetDefaultValue(@NonNull 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 getString.

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

Returns
`Object`	The default value of this preference type

onRestoreInstanceState

protected 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. This function will never be called with a null state.

Parameters
`@Nullable Parcelable state`	The saved state that had previously been returned by `onSaveInstanceState`.

See also
`onSaveInstanceState`
`restoreHierarchyState`

onSaveInstanceState

protected @Nullable 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
`@Nullable 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`.

See also
`onRestoreInstanceState`
`saveHierarchyState`

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

ListPreference

Summary

Nested types

Public constructors

Public methods

Protected methods

Inherited Constants

Inherited methods

Public constructors

ListPreference

ListPreference

ListPreference

ListPreference

Public methods

findIndexOfValue

getEntries

getEntry

getEntryValues

getSummary

getValue

setEntries

setEntries

setEntryValues

setEntryValues

setSummary

setValue

setValueIndex

Protected methods

onGetDefaultValue

onRestoreInstanceState

onSaveInstanceState

onSetInitialValue