ListState

java.lang.Object
- ohos.agp.components.listcomponent.ListState

```
public class ListState
extends Object
```
Implements the storage of various state information of the ListComponent. This class provides the information for internal submodules of the ListComponent to use as the status context.

从以下版本开始:

7

构造器概要

构造器
构造器说明

ListState()

构造器
构造器	说明
`ListState()`

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`int`	`getDeletedNotLaidItemCountSincePreviousLayout()`	Obtains the number of components that are not laid out but have been deleted from the provider after the previous layout.
`long`	`getFocusedListItemId()`	Obtains the ID of the component that gains focus.
`int`	`getFocusedListItemPosition()`	Obtains the position of the component that gains focus.
`int`	`getFocusedSubChildViewId()`	Obtains the ID of the child component that gains focus.
`int`	`getLayoutStateStep()`	Obtains the layout state of the `ListComponent`.
`int`	`getListItemCount()`	Obtains the number of components in the provider.
`int`	`getPreviousLaidLayoutItemCount()`	Obtains the number of components in the provider in the previous layout.
`int`	`getSurplusScrollHorizontal()`	Obtains the remaining horizontal distance to scroll for the animation that is being scrolled.
`int`	`getSurplusScrollVertical()`	Obtains the remaining vertical distance to scroll for the animation that is being scrolled.
`int`	`getTargetScrollPosition()`	Obtains the position to which the component is scrolled.
`boolean`	`isDateSetStructureModified()`	Checks whether data changes after the last layout.
`boolean`	`isInListMeasuringState()`	Checks whether this `ListComponent` is measuring the layout.
`boolean`	`isInPreLayout()`	Checks whether the `ListComponent` is in pre-layout state.
`boolean`	`isOperaSimpleAnimations()`	Checks whether this `ListComponent` runs simple animations during layout.
`boolean`	`isTrackOldChangeOwner()`	Checks whether to trace the original `ComponentOwner` if data changes and the change animation is executed.
`boolean`	`willOperaPredictiveAnimations()`	Checks whether this `ListComponent` runs predictive animations during layout and pre-process the animations in the pre-layout phase.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - ListState
```
public ListState()
```
- 方法详细资料
  - getTargetScrollPosition
```
public int getTargetScrollPosition()
```
    Obtains the position to which the component is scrolled.
    
    返回:
    
    Returns the position of the component in the provider.
    
    从以下版本开始:
    
    7
  - getPreviousLaidLayoutItemCount
```
public int getPreviousLaidLayoutItemCount()
```
    Obtains the number of components in the provider in the previous layout.
    
    返回:
    
    Returns the number of components.
    
    从以下版本开始:
    
    7
  - getDeletedNotLaidItemCountSincePreviousLayout
```
public int getDeletedNotLaidItemCountSincePreviousLayout()
```
    Obtains the number of components that are not laid out but have been deleted from the provider after the previous layout.
    
    返回:
    
    Returns the number of components.
    
    从以下版本开始:
    
    7
  - getLayoutStateStep
```
public int getLayoutStateStep()
```
    Obtains the layout state of the ListComponent.
    
    返回:
    
    Returns the layout state.
    
    从以下版本开始:
    
    7
  - getListItemCount
```
public int getListItemCount()
```
    Obtains the number of components in the provider.
    
    返回:
    
    Returns the number of components.
    
    从以下版本开始:
    
    7
  - isDateSetStructureModified
```
public boolean isDateSetStructureModified()
```
    Checks whether data changes after the last layout.
    
    返回:
    
    Returns true if the data changes; returns false otherwise.
    
    从以下版本开始:
    
    7
  - isInPreLayout
```
public boolean isInPreLayout()
```
    Checks whether the ListComponent is in pre-layout state.
    
    返回:
    
    Returns true if the ListComponent is in pre-layout state; returns false otherwise.
    
    从以下版本开始:
    
    7
  - isTrackOldChangeOwner
```
public boolean isTrackOldChangeOwner()
```
    Checks whether to trace the original ComponentOwner if data changes and the change animation is executed.
    
    返回:
    
    Returns true if the original ComponentOwner needs to be traced; returns false otherwise.
    
    从以下版本开始:
    
    7
  - isInListMeasuringState
```
public boolean isInListMeasuringState()
```
    Checks whether this ListComponent is measuring the layout.
    
    返回:
    
    Returns true if the ListComponent is measuring the layout; returns false otherwise.
    
    从以下版本开始:
    
    7
  - isOperaSimpleAnimations
```
public boolean isOperaSimpleAnimations()
```
    Checks whether this ListComponent runs simple animations during layout.
    
    返回:
    
    Returns true if the ListComponent runs simple animations during layout; returns false otherwise.
    
    从以下版本开始:
    
    7
  - willOperaPredictiveAnimations
```
public boolean willOperaPredictiveAnimations()
```
    Checks whether this ListComponent runs predictive animations during layout and pre-process the animations in the pre-layout phase.
    
    返回:
    
    Returns true if the ListComponent runs predictive animations during layout and pre-process the animations in the pre-layout phase; returns false otherwise.
    
    从以下版本开始:
    
    7
  - getFocusedListItemPosition
```
public int getFocusedListItemPosition()
```
    Obtains the position of the component that gains focus.
    
    返回:
    
    Returns the position.
    
    从以下版本开始:
    
    7
  - getFocusedListItemId
```
public long getFocusedListItemId()
```
    Obtains the ID of the component that gains focus.
    
    返回:
    
    Returns the component ID.
    
    从以下版本开始:
    
    7
  - getFocusedSubChildViewId
```
public int getFocusedSubChildViewId()
```
    Obtains the ID of the child component that gains focus.
    
    返回:
    
    Returns the ID of the child component. The default value is 0.
  - getSurplusScrollHorizontal
```
public int getSurplusScrollHorizontal()
```
    Obtains the remaining horizontal distance to scroll for the animation that is being scrolled.
    
    返回:
    
    Returns the remaining horizontal distance to scroll, in pixels. The default value is 0.
    
    从以下版本开始:
    
    7
  - getSurplusScrollVertical
```
public int getSurplusScrollVertical()
```
    Obtains the remaining vertical distance to scroll for the animation that is being scrolled.
    
    返回:
    
    Returns the remaining vertical distance to scroll, in pixels. The default value is 0.
    
    从以下版本开始:
    
    7

类 ListState

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

ListState

方法详细资料

getTargetScrollPosition

getPreviousLaidLayoutItemCount

getDeletedNotLaidItemCountSincePreviousLayout

getLayoutStateStep

getListItemCount

isDateSetStructureModified

isInPreLayout

isTrackOldChangeOwner

isInListMeasuringState

isOperaSimpleAnimations

willOperaPredictiveAnimations

getFocusedListItemPosition

getFocusedListItemId

getFocusedSubChildViewId

getSurplusScrollHorizontal

getSurplusScrollVertical