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Added in API level 14

TwoStatePreference

public abstract class TwoStatePreference
extends Preference

java.lang.Object
	android.preference.Preference
		android.preference.TwoStatePreference

Known Direct Subclasses

CheckBoxPreference, SwitchPreference

具有两种可选状态的首选项的公共基类，在SharedPreferences中保留布尔值，并且可能具有根据当前状态启用/禁用的相关首选项。

摘要(Summary)

Inherited XML attributes

From class android.preference.Preference

`android:defaultValue`	The default value for the preference, which will be set either if persistence is off or persistence is on and the preference is not found in the persistent storage.
`android:dependency`	The key of another Preference that this Preference will depend on.
`android:enabled`	Whether the Preference is enabled.
`android:fragment`	When used inside of a modern PreferenceActivity, this declares a new PreferenceFragment to be shown when the user selects this item.
`android:icon`	The optional icon for the preference 必须是另一个资源的引用，其形式为“ `@[+][package:]type:name` ”，或者其形式为“一个主题属性 `?[package:][type:]name` ”。
`android:key`	The key to store the Preference value.
`android:layout`	The layout for the Preference in a PreferenceActivity screen.
`android:order`	The order for the Preference (lower values are to be ordered first).
`android:persistent`	Whether the Preference stores its value to the shared preferences.
`android:selectable`	Whether the Preference is selectable.
`android:shouldDisableView`	Whether the view of this Preference should be disabled when this Preference is disabled.
`android:summary`	The summary for the Preference in a PreferenceActivity screen.
`android:title`	The title for the Preference in a PreferenceActivity screen.
`android:widgetLayout`	The layout for the controllable widget portion of a Preference.

Inherited constants

From class android.preference.Preference

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)`

公共方法(Public methods)
`boolean`	`getDisableDependentsState()` 返回此首选项开启时是否禁用家属（ `true` ）或此首选项关闭时（ `false` ）。
`CharSequence`	`getSummaryOff()` 返回未选中时显示的摘要。
`CharSequence`	`getSummaryOn()` 返回选中时显示的摘要。
`boolean`	`isChecked()` 返回检查的状态。
`void`	`setChecked(boolean checked)` 设置选中的状态并将其保存到 `SharedPreferences` 。
`void`	`setDisableDependentsState(boolean disableDependentsState)` 设置此首选项开启时是否禁用家属（ `true` ）或此首选项关闭时（ `false` ）。
`void`	`setSummaryOff(CharSequence summary)` 设置未选中时显示的摘要。
`void`	`setSummaryOff(int summaryResId)`
`void`	`setSummaryOn(int summaryResId)`
`void`	`setSummaryOn(CharSequence summary)` 设置选中时显示的摘要。
`boolean`	`shouldDisableDependents()` 检查当前是否应该禁用此首选项的依赖项。

Protected methods
`void`	`onClick()` 处理点击偏好。
`Object`	`onGetDefaultValue(TypedArray a, int index)` 当首选项被夸大并且需要读取默认值属性时调用。
`void`	`onRestoreInstanceState(Parcelable state)` Hook允许偏好重新应用以前由 `onSaveInstanceState()`生成的内部状态的表示。
`Parcelable`	`onSaveInstanceState()` 钩子允许首选项生成其内部状态的表示，稍后可用于创建具有相同状态的新实例。
`void`	`onSetInitialValue(boolean restoreValue, Object defaultValue)` 执行此操作来设置首选项的初始值。

继承方法(Inherited methods)

From class android.preference.Preference

From class java.lang.Object

From interface java.lang.Comparable

Public constructors

TwoStatePreference

Added in API level 21

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

参数(Parameters)
`context`	`Context`
`attrs`	`AttributeSet`
`defStyleAttr`	`int`
`defStyleRes`	`int`

TwoStatePreference

Added in API level 14

TwoStatePreference (Context context, 
                AttributeSet attrs, 
                int defStyleAttr)

参数(Parameters)
`context`	`Context`
`attrs`	`AttributeSet`
`defStyleAttr`	`int`

TwoStatePreference

Added in API level 14

TwoStatePreference (Context context, 
                AttributeSet attrs)

参数(Parameters)
`context`	`Context`
`attrs`	`AttributeSet`

TwoStatePreference

Added in API level 14

TwoStatePreference (Context context)

参数(Parameters)
`context`	`Context`

公共方法(Public methods)

getDisableDependentsState

Added in API level 1

boolean getDisableDependentsState ()

返回当此首选项打开时（ true ）或此首选项关闭时是否禁用家属（ false ）。

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

getSummaryOff

Added in API level 1

CharSequence getSummaryOff ()

返回未选中时显示的摘要。

返回(Returns)
`CharSequence`	The summary.

getSummaryOn

Added in API level 1

CharSequence getSummaryOn ()

返回选中时显示的摘要。

返回(Returns)
`CharSequence`	The summary.

isChecked

Added in API level 1

boolean isChecked ()

返回检查的状态。

返回(Returns)
`boolean`	The checked state.

setChecked

Added in API level 1

void setChecked (boolean checked)

设置选中状态并将其保存到 SharedPreferences 。

参数(Parameters)
`checked`	`boolean`: The checked state.

setDisableDependentsState

Added in API level 1

void setDisableDependentsState (boolean disableDependentsState)

设置当此首选项打开时（ true ）还是此首选项关闭时（ false ），是否禁用了依赖 false 。

参数(Parameters)
`disableDependentsState`	`boolean`: The preference state that should disable dependents.

setSummaryOff

Added in API level 1

void setSummaryOff (CharSequence summary)

设置未选中时显示的摘要。

参数(Parameters)
`summary`	`CharSequence`: The summary to be shown when unchecked.

setSummaryOff

Added in API level 1

void setSummaryOff (int summaryResId)

参数(Parameters)
`summaryResId`	`int`: The summary as a resource.

也可以看看：

setSummaryOff(CharSequence)

setSummaryOn

Added in API level 1

void setSummaryOn (int summaryResId)

参数(Parameters)
`summaryResId`	`int`: The summary as a resource.

也可以看看：

setSummaryOn(CharSequence)

setSummaryOn

Added in API level 1

void setSummaryOn (CharSequence summary)

设置选中时显示的摘要。

参数(Parameters)
`summary`	`CharSequence`: The summary to be shown when checked.

shouldDisableDependents

Added in API level 1

boolean shouldDisableDependents ()

检查当前是否应该禁用此首选项的依赖项。

返回(Returns)
`boolean`	True if the dependents should be disabled, otherwise false.

Protected methods

onClick

Added in API level 1

void onClick ()

处理点击偏好。这包括将值保存到SharedPreferences 。但是，重写的方法应该调用callChangeListener(Object)以确保客户端想要用新值更新首选项的状态。

onGetDefaultValue

Added in API level 1

Object onGetDefaultValue (TypedArray a, 
                int index)

当首选项被夸大并且需要读取默认值属性时调用。由于不同的首选项类型具有不同的值类型，因此子类应获取并返回默认值，该默认值将是其值类型。

例如，如果值类型为String，则该方法的主体将代理为 getString(int) 。

参数(Parameters)
`a`	`TypedArray`: The set of attributes.
`index`	`int`: The index of the default value attribute.

返回(Returns)
`Object`	The default value of this preference type.

onRestoreInstanceState

Added in API level 1

void onRestoreInstanceState (Parcelable state)

钩子允许偏好重新应用其以前由onSaveInstanceState()生成的内部状态的表示。这个函数永远不会被调用为null状态。

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

onSaveInstanceState

Added in API level 1

Parcelable onSaveInstanceState ()

钩子允许首选项生成其内部状态的表示，稍后可用于创建具有相同状态的新实例。这个状态应该只包含不持久的或者稍后可以重建的信息。

返回(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

Added in API level 1

void onSetInitialValue (boolean restoreValue, 
                Object defaultValue)

执行此操作来设置首选项的初始值。

如果restorePersistedValue为true，则应从SharedPreferences恢复首选项值。如果restorePersistedValue为false，则应将Preference值设置为给定的defaultValue（并且如果shouldPersist()为true，则可能shouldPersist()其存储到SharedPreferences中）。

这可能并不总是被称为。一个例子是，如果它不应该坚持，但没有给出默认值。

参数(Parameters)
`restoreValue`	`boolean`: True to restore the persisted value; false to use the given `defaultValue`.
`defaultValue`	`Object`: The default value for this Preference. Only use this if `restorePersistedValue` is false.

Interfaces

Classes

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Recently visited

Results for

TwoStatePreference

摘要(Summary)

Inherited XML attributes

Inherited constants

Public constructors

公共方法(Public methods)

Protected methods

继承方法(Inherited methods)

Public constructors

TwoStatePreference

TwoStatePreference

TwoStatePreference

TwoStatePreference

公共方法(Public methods)

getDisableDependentsState

getSummaryOff

getSummaryOn

isChecked

setChecked

setDisableDependentsState

setSummaryOff

setSummaryOff

setSummaryOn

setSummaryOn

shouldDisableDependents

Protected methods

onClick

onGetDefaultValue

onRestoreInstanceState

onSaveInstanceState

onSetInitialValue