public class

ListPreference

extends DialogPreference
java.lang.Object
   ↳ android.preference.Preference
     ↳ android.preference.DialogPreference
       ↳ android.preference.ListPreference

Class Overview

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

This preference will store a string into the SharedPreferences. This string will be the value from the setEntryValues(CharSequence[]) array.

Summary

XML Attributes
Attribute Name Related Method Description
android:entries The human-readable array to present as a list. 
android:entryValues The array to find the value to save for a preference when an entry from entries is selected. 
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Inherited XML Attributes
From class android.preference.DialogPreference
From class android.preference.Preference
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Inherited Constants
From class android.preference.Preference
Public Constructors
ListPreference(Context context, AttributeSet attrs)
ListPreference(Context context)
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.
CharSequence getEntry()
Returns the entry corresponding to the current value.
CharSequence[] getEntryValues()
Returns the array of values to be saved for the 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(int entriesResId)
void setEntryValues(int entryValuesResId)
void setEntryValues(CharSequence[] entryValues)
The array to find the value to save for a preference when an entry from entries is selected.
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
void onDialogClosed(boolean positiveResult)
Called when the dialog is dismissed and should be used to save data to the SharedPreferences.
Object onGetDefaultValue(TypedArray a, int index)
Called when a Preference is being inflated and the default value attribute needs to be read.
void onPrepareDialogBuilder(AlertDialog.Builder builder)
Prepares the dialog builder to be shown when the preference is clicked.
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(boolean restoreValue, Object defaultValue)
Implement this to set the initial value of the Preference.
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Inherited Methods
From class android.preference.DialogPreference
From class android.preference.Preference
From class java.lang.Object
From interface android.content.DialogInterface.OnClickListener
From interface android.content.DialogInterface.OnDismissListener
From interface android.preference.PreferenceManager.OnActivityDestroyListener
From interface java.lang.Comparable

XML Attributes

android:entries

The human-readable array to present as a list. Each entry must have a corresponding index in entryValues.

Must be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".

This corresponds to the global attribute resource symbol entries.

Related Methods

android: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.

Must be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".

This corresponds to the global attribute resource symbol entryValues.

Related Methods

Public Constructors

public ListPreference (Context context, AttributeSet attrs)

public ListPreference (Context context)

Public Methods

public int findIndexOfValue (String value)

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

Parameters
value The value whose index should be returned.
Returns
  • The index of the value, or -1 if not found.

public CharSequence[] getEntries ()

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

Returns
  • The list as an array.

public CharSequence getEntry ()

Returns the entry corresponding to the current value.

Returns
  • The entry corresponding to the current value, or null.

public CharSequence[] getEntryValues ()

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

Returns
  • The array of values.

public String getValue ()

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

Returns
  • The value of the key.

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(CharSequence[]).

Parameters
entries The entries.

public void setEntries (int entriesResId)

Parameters
entriesResId The entries array as a resource.

public void setEntryValues (int entryValuesResId)

Parameters
entryValuesResId The entry values array as a resource.

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
entryValues The array to be used as values to save for the preference.

public void setValue (String value)

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

Parameters
value The value to set for the key.

public void setValueIndex (int index)

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

Parameters
index The index of the value to set.

Protected Methods

protected void onDialogClosed (boolean positiveResult)

Called when the dialog is dismissed and should be used to save data to the SharedPreferences.

Parameters
positiveResult Whether the positive button was clicked (true), or the negative button was clicked or the dialog was canceled (false).

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 getString(int).

Parameters
a The set of attributes.
index The index of the default value attribute.
Returns
  • The default value of this preference type.

protected void onPrepareDialogBuilder (AlertDialog.Builder builder)

Prepares the dialog builder to be shown when the preference is clicked. Use this to set custom properties on the dialog.

Do not create() or show().

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 The saved state that had previously been returned by 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
  • 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.

protected void onSetInitialValue (boolean restoreValue, Object defaultValue)

Implement this to set the initial value of the Preference.

If restorePersistedValue is true, you should restore the Preference value from the SharedPreferences. If restorePersistedValue is false, you should set the Preference value to defaultValue that is given (and possibly store to SharedPreferences if shouldPersist() is true).

This may not always be called. One example is if it should not persist but there is no default value given.

Parameters
restoreValue True to restore the persisted value; false to use the given defaultValue.
defaultValue The default value for this Preference. Only use this if restorePersistedValue is false.