程序包 ohos.media.common

类 AVMetadata

java.lang.Object

ohos.media.common.AVMetadata

所有已实现的接口:

Sequenceable

public final class AVMetadata
extends Object
implements Sequenceable

Represents media metadata, which is used for media data display.

You can use this class to obtain metadata information about a media item.

从以下版本开始:

3

SystemCapability

SystemCapability.Multimedia#MEDIA

嵌套类概要

嵌套类

限定符和类型	类	说明
static interface	AVMetadata.AVLongKey	Enumerates the keys for long values in the media metadata.
static interface	AVMetadata.AVPixelMapKey	Enumerates the keys for PixelMap values in the media metadata.
static interface	AVMetadata.AVTextKey	Enumerates the keys for text values in the media metadata.
static class	AVMetadata.Builder	Builder class used to create AVMetadata objects.

从接口继承的嵌套类/接口 ohos.utils.Sequenceable

Sequenceable.Producer<T>

字段概要

字段

限定符和类型	字段	说明
static Sequenceable.Producer<AVMetadata>	CREATOR	Indicates a creator to generate an AVMetadata instance from a Parcel.

方法概要

限定符和类型	方法	说明
AVDescription	getAVDescription()	Obtains the brief description of this AVMetadata object.
Set<String>	getKeysSet()	Obtains a set of available string keys contained in the media metadata.
long	getLong(String key)	Obtains the long value of the specified key in the media metadata.
PixelMap	getPixelMap(String key)	Obtains the PixelMap value of the specified key in the media metadata.
String	getString(String key)	Obtains the string value of the specified key in the media metadata.
CharSequence	getText(String key)	Obtains the CharSequence value of the specified key in the media metadata.
boolean	hasKey(String key)	Checks whether the specified key is contained in the media metadata.
boolean	marshalling(Parcel in)	Writes an AVMetadata object from a Parcel.
boolean	unmarshalling(Parcel in)	Restores an AVMetadata object from a Parcel.

从类继承的方法 java.lang.Object

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

从接口继承的方法 ohos.utils.Sequenceable

hasFileDescriptor

字段详细资料

CREATOR

public static final Sequenceable.Producer<AVMetadata> CREATOR

Indicates a creator to generate an AVMetadata instance from a Parcel.

从以下版本开始:

3

方法详细资料

hasKey

public boolean hasKey(String key)

Checks whether the specified key is contained in the media metadata.

参数:

key - Indicates the key.

返回:

Returns true if it exists; returns false otherwise.

从以下版本开始:

3

getText

public CharSequence getText(String key)

Obtains the CharSequence value of the specified key in the media metadata.

参数:

key - Indicates the key, which can be one defined in AVMetadata.AVTextKey or a custom key you have defined.

返回:

Returns the value of the specified key if obtained; returns null if the key does not exist.

从以下版本开始:

3

getString

public String getString(String key)

Obtains the string value of the specified key in the media metadata.

参数:

key - Indicates the key, which can be one defined in AVMetadata.AVTextKey or a custom key you have defined.

返回:

Returns the value of the specified key if obtained; returns null if the key does not exist.

从以下版本开始:

3

getLong

public long getLong(String key)

Obtains the long value of the specified key in the media metadata.

参数:

key - Indicates the key, which can be one defined in AVMetadata.AVLongKey or a custom key you have defined.

返回:

Returns the value of the specified key if obtained; returns 0L if the key does not exist.

从以下版本开始:

3

getKeysSet

public Set<String> getKeysSet()

Obtains a set of available string keys contained in the media metadata.

返回:

Returns the string key set.

从以下版本开始:

3

getPixelMap

public PixelMap getPixelMap(String key)

Obtains the PixelMap value of the specified key in the media metadata.

参数:

key - Indicates the key, which can be one defined in AVMetadata.AVPixelMapKey or a custom key you have defined.

返回:

Returns the value of the specified key if obtained; returns null if the key does not exist.

从以下版本开始:

3

getAVDescription

public AVDescription getAVDescription()

Obtains the brief description of this AVMetadata object. For details, see AVDescription.

返回:

Returns the brief description.

从以下版本开始:

3

marshalling

public boolean marshalling(Parcel in)

Writes an AVMetadata object from a Parcel.

指定者:

marshalling 在接口中 Sequenceable

参数:

in - Indicates the Parcel object into which the AVMetadata object will be written.

返回:

Returns true if the marshalling is successful; returns false otherwise.

从以下版本开始:

3

unmarshalling

public boolean unmarshalling(Parcel in)

Restores an AVMetadata object from a Parcel.

指定者:

unmarshalling 在接口中 Sequenceable

参数:

in - Indicates the Parcel object into which the AVMetadata object has been written.

返回:

Returns true if the unmarshalling is successful; returns false otherwise.

从以下版本开始:

3