程序包 ohos.agp.components.listcomponent

类 ListAdornment

java.lang.Object

ohos.agp.components.listcomponent.ListAdornment

直接已知子类:

ItemTouchExpand

public abstract class ListAdornment
extends Object

Implements special drawing and layout offsets for components in the provider's data set.

You can customize the drawing (for example, using a divider) before or after the ListComponent is drawn.

从以下版本开始:

7

嵌套类概要

嵌套类

限定符和类型	类	说明
protected static class	ListAdornment.ListAdornmentCleaner	Implements the release of the ListAdornment object.

字段概要

字段

限定符和类型	字段	说明
protected long	mNativePtr	The pointer to a native ListAdornment object.

构造器概要

构造器

构造器	说明
ListAdornment()	A constructor used to create a ListAdornment instance.

方法概要

限定符和类型	方法	说明
void	afterDrawCallback(Canvas canvas, ListComponent parent, ListState uiState)	Draws a ListAdornment after drawing a component.
void	beforeDrawCallback(Canvas canvas, ListComponent parent, ListState uiState)	Draws a ListAdornment before drawing a component.
protected void	createNativePtr()	Creates a native pointer to this ListAdornment instance.
void	getItemDeltas(Rect rect, Component component, ListComponent parent, ListState uiState)	Obtains the offset of the four boundaries of the specified component in this ListAdornment.
long	getNativePtr()	Obtains the native object.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

mNativePtr

protected long mNativePtr

The pointer to a native ListAdornment object.

构造器详细资料

ListAdornment

public ListAdornment()

A constructor used to create a ListAdornment instance.

从以下版本开始:

7

方法详细资料

getNativePtr

public long getNativePtr()

Obtains the native object.

返回:

Returns the native object.

createNativePtr

protected void createNativePtr()

Creates a native pointer to this ListAdornment instance.

从以下版本开始:

7

beforeDrawCallback

public void beforeDrawCallback(Canvas canvas,
                               ListComponent parent,
                               ListState uiState)

Draws a ListAdornment before drawing a component.

参数:

canvas - Indicates the canvas used for drawing.

parent - Indicates the ListComponent corresponding to the ListAdornment.

uiState - Indicates the status of the ListComponent.

从以下版本开始:

7

afterDrawCallback

public void afterDrawCallback(Canvas canvas,
                              ListComponent parent,
                              ListState uiState)

Draws a ListAdornment after drawing a component.

参数:

canvas - Indicates the canvas used for drawing.

parent - Indicates the ListComponent corresponding to the ListAdornment.

uiState - Indicates the status of the ListComponent.

从以下版本开始:

7

getItemDeltas

public void getItemDeltas(Rect rect,
                          Component component,
                          ListComponent parent,
                          ListState uiState)

Obtains the offset of the four boundaries of the specified component in this ListAdornment.

You need to implement this method.

参数:

rect - Indicates the rectangle used to store the offset of the four boundaries.

component - Indicates the component.

parent - Indicates the ListComponent corresponding to the ListAdornment.

uiState - Indicates the status of the ListComponent.

从以下版本开始:

7