程序包 ohos.media.photokit.support

类 FetchResult<Type>

java.lang.Object

ohos.media.photokit.support.FetchResult<Type>

类型参数:

Type - Indicates the type of the instances in the result set.

所有已实现的接口:

Closeable, AutoCloseable

public class FetchResult<Type>
extends Object
implements Closeable

Represents a result set that contains either AlbumList or AlbumListInfo instances, and provides methods to get an instance at a specified position in the FetchResult instance.

从以下版本开始:

5

SystemCapability

SystemCapability.Multimedia#MEDIA_LIBRARY

字段概要

字段

限定符和类型	字段	说明
static String	MEDIA_TYPE_ALBUM_LIST	Indicates that this FetchResult instance contains AlbumList instances.
static String	MEDIA_TYPE_ALBUM_LIST_INFO	Indicates that this FetchResult instance contains AlbumListInfo instances.

构造器概要

构造器

构造器	说明
FetchResult(Context callerContext, ResultSet resultSet, String type)	A constructor used to create a FetchResult instance.

方法概要

限定符和类型	方法	说明
void	close()	Closes this stream and releases any system resources associated with it.
int	getCount()	Obtains the number of AlbumList or AlbumListInfo instances contained in this FetchResult instance.
Type	getFirstObject()	Obtains the first instance in this FetchResult instance.
Type	getLastObject()	Obtains the last instance in this FetchResult instance.
Type	getNextObject()	Obtains the next instance in this FetchResult instance.
Type	getPositionObject(int index)	Obtains an instance at a specified position in this FetchResult instance.
boolean	isClosed()	Checks whether this FetchResult instance is closed.
boolean	isContain()	Obtains whether this FetchResult instance contains either AlbumList or AlbumListInfo instances.

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

MEDIA_TYPE_ALBUM_LIST

public static final String MEDIA_TYPE_ALBUM_LIST

Indicates that this FetchResult instance contains AlbumList instances.

从以下版本开始:

5

另请参阅:

常量字段值

MEDIA_TYPE_ALBUM_LIST_INFO

public static final String MEDIA_TYPE_ALBUM_LIST_INFO

Indicates that this FetchResult instance contains AlbumListInfo instances.

从以下版本开始:

5

另请参阅:

常量字段值

构造器详细资料

FetchResult

public FetchResult(Context callerContext,
                   ResultSet resultSet,
                   String type)

A constructor used to create a FetchResult instance.

参数:

callerContext - Indicates the application context.

resultSet - Indicates the result set from which information is fetched.

type - Indicates the type of the result to fetch, which can be MEDIA_TYPE_ALBUM_LIST or MEDIA_TYPE_ALBUM_LIST_INFO.

从以下版本开始:

5

方法详细资料

close

public void close()

从接口复制的说明: Closeable

Closes this stream and releases any system resources associated with it. If the stream is already closed then invoking this method has no effect.

As noted in AutoCloseable#close(), cases where the close may fail require careful attention. It is strongly advised to relinquish the underlying resources and to internally mark the Closeable as closed, prior to throwing the IOException.

指定者:

close 在接口中 AutoCloseable

指定者:

close 在接口中 Closeable

isContain

public boolean isContain()

Obtains whether this FetchResult instance contains either AlbumList or AlbumListInfo instances.

返回:

Returns true if this FetchResult instance contains instances of either types; returns false otherwise.

从以下版本开始:

5

getCount

public int getCount()

Obtains the number of AlbumList or AlbumListInfo instances contained in this FetchResult instance.

返回:

Returns the number of instances in this FetchResult instance.

从以下版本开始:

5

isClosed

public boolean isClosed()

Checks whether this FetchResult instance is closed.

返回:

Returns true if this FetchResult instance is closed; returns false otherwise.

从以下版本开始:

5

getPositionObject

public Type getPositionObject(int index)

Obtains an instance at a specified position in this FetchResult instance.

参数:

index - Indicates the instance index.

返回:

Returns the instance at the specified index.

从以下版本开始:

5

getFirstObject

public Type getFirstObject()

Obtains the first instance in this FetchResult instance.

返回:

Returns the first instance.

从以下版本开始:

5

getNextObject

public Type getNextObject()

Obtains the next instance in this FetchResult instance.

返回:

Returns the next instance.

从以下版本开始:

5

getLastObject

public Type getLastObject()

Obtains the last instance in this FetchResult instance.

返回:

Returns the last instance.

从以下版本开始:

5