程序包 ohos.media.photokit.metadata

类 AVStorage

java.lang.Object

ohos.media.photokit.metadata.AVStorage

public final class AVStorage
extends Object

Provides a set of indexes for common media data, including audio, video, and images.

You can obtain AVStorage.Audio, AVStorage.Video, and AVStorage.Images instances that contain index information for different types of media data.

从以下版本开始:

3

SystemCapability

SystemCapability.Multimedia#MEDIA_LIBRARY

嵌套类概要

嵌套类

限定符和类型	类	说明
static class	AVStorage.Audio	Provides all media data of the audio/* MIME type.
static interface	AVStorage.AVBaseColumns	Provides basic fields for media data.
static class	AVStorage.Downloads	Provides download item information.
static class	AVStorage.Files	Provides the index table for all media files.
static class	AVStorage.Images	Provides all media data of the image/* MIME type.
static class	AVStorage.Video	Provides all media data of the video/* MIME type.

字段概要

字段

限定符和类型	字段	说明
static Uri	MEDIA_AUTH_HEAD_URI	Indicates the media data authentication header, which is in dataability://URI} format.

方法概要

限定符和类型	方法	说明
static Uri	appendPendingResource(Uri uri)	Updates the specified Uri to include media items to be processed.
static Uri	appendRequireOriginalResource(Uri uri)	Updates the specified Uri to provide the application with access to original file content.
static Uri	fetchDocumentResource(Context context, Uri mediaUri)	Obtains a document URI that is equivalent to the specified AVStorage URI.
static Set<String>	fetchExternalVolumeNames(Context context)	Obtains names of the volumes that form the external volume.
static Uri	fetchLoggerResource()	Obtains a URI in dataability:// format used to query the media scanning state.
static Uri	fetchMediaResource(Context context, Uri documentUri)	Obtains an AVStorage URI that is equivalent to the specified document URI.
static String	fetchVersion(Context context)	Obtains the opaque version information of the volume named external_primary.
static String	fetchVersion(Context context, String volumeName)	Obtains the opaque version information of the specified volume.
static String	fetchVolumeName(Uri uri)	Obtains the name of the database volume based on the specified Uri.

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_AUTH_HEAD_URI

public static final Uri MEDIA_AUTH_HEAD_URI

Indicates the media data authentication header, which is in dataability://URI} format.

从以下版本开始:

3

方法详细资料

appendPendingResource

public static Uri appendPendingResource(Uri uri)

Updates the specified Uri to include media items to be processed.

参数:

uri - Indicates the URI to update.

返回:

Returns the updated URI.

抛出:

IllegalArgumentException - Throws this exception if the input URI is null.

从以下版本开始:

3

appendRequireOriginalResource

public static Uri appendRequireOriginalResource(Uri uri)

Updates the specified Uri to provide the application with access to original file content.

参数:

uri - Indicates the URI to update.

返回:

Returns the updated URI.

抛出:

IllegalArgumentException - Throws this exception if the input URI is null.

从以下版本开始:

3

fetchVolumeName

public static String fetchVolumeName(Uri uri)

Obtains the name of the database volume based on the specified Uri.

参数:

uri - Indicates the URI.

返回:

Returns the database volume name.

抛出:

IllegalArgumentException - Throws this exception if the input URI is null.

从以下版本开始:

3

fetchExternalVolumeNames

public static Set<String> fetchExternalVolumeNames(Context context)

Obtains names of the volumes that form the external volume.

参数:

context - Indicates the application context.

返回:

Returns the volume name list.

抛出:

IllegalArgumentException - Throws this exception if the application context is null or invalid.

从以下版本开始:

3

fetchMediaResource

public static Uri fetchMediaResource(Context context,
                                     Uri documentUri)

Obtains an AVStorage URI that is equivalent to the specified document URI.

参数:

context - Indicates the application context.

documentUri - Indicates the document URI.

返回:

Returns the AVStorage URI.

抛出:

IllegalArgumentException - Throws this exception if the application context is null or invalid, or the document URI is null.

从以下版本开始:

3

fetchDocumentResource

public static Uri fetchDocumentResource(Context context,
                                        Uri mediaUri)

Obtains a document URI that is equivalent to the specified AVStorage URI.

参数:

context - Indicates the application context.

mediaUri - Indicates the AVStorage URI.

返回:

Returns the document URI.

抛出:

IllegalArgumentException - Throws this exception if the application context is null or invalid, or the AVStorage URI is null.

从以下版本开始:

3

fetchVersion

public static String fetchVersion(Context context)

Obtains the opaque version information of the volume named external_primary.

参数:

context - Indicates the application context.

返回:

Returns the version information.

抛出:

IllegalArgumentException - Throws this exception if the application context is null or invalid.

从以下版本开始:

3

fetchVersion

public static String fetchVersion(Context context,
                                  String volumeName)

Obtains the opaque version information of the specified volume.

参数:

context - Indicates the application context.

volumeName - Indicates the volume name.

返回:

Returns the opaque version information.

抛出:

IllegalArgumentException - Throws this exception if the application context is null or invalid, or the volume name is null or invalid.

从以下版本开始:

3

fetchLoggerResource

public static Uri fetchLoggerResource()

Obtains a URI in dataability:// format used to query the media scanning state.

返回:

Returns the URI.

从以下版本开始:

3