com.aliyun.thumbnail

Class ThumbnailHelper

java.lang.Object

com.aliyun.thumbnail.ThumbnailHelper

public class ThumbnailHelper
extends java.lang.Object

Thumbnail utility class. Used to parse and retrieve video thumbnails from VTT files, supporting asynchronous loading and bitmap caching. Usage steps: 1. Create a ThumbnailHelper instance 2. Set listeners: setOnPrepareListener(OnPrepareListener), setOnThumbnailGetListener(OnThumbnailGetListener) 3. Call prepare() method to prepare thumbnail data 4. After successful preparation, call requestBitmapAtPosition(long) to get thumbnail at specified position 5. Receive results through ThumbnailHelper.OnThumbnailGetListener callback

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ThumbnailHelper.OnPrepareListener Thumbnail data preparation listener.
static interface	ThumbnailHelper.OnThumbnailGetListener Thumbnail retrieval result listener.

Constructor Summary

Constructors

Constructor and Description
ThumbnailHelper(java.lang.String url) Create a ThumbnailHelper instance.

Method Summary

Modifier and Type	Method and Description
static void	loadClass()
void	prepare() Prepare thumbnail image data.
void	requestBitmapAtPosition(long positionMs) Get the position of the thumbnail image.
void	setOnPrepareListener(ThumbnailHelper.OnPrepareListener l) Set thumbnail data preparation listener.
void	setOnThumbnailGetListener(ThumbnailHelper.OnThumbnailGetListener l) Set a thumbnail image retrieval callback.

Methods inherited from class java.lang.Object

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

Constructor Detail

ThumbnailHelper

public ThumbnailHelper(java.lang.String url)

Create a ThumbnailHelper instance.

Parameters:

url - The URL address of the thumbnail VTT file, supporting HTTP and HTTPS protocols

Method Detail

loadClass

public static void loadClass()

setOnPrepareListener

public void setOnPrepareListener(ThumbnailHelper.OnPrepareListener l)

Set thumbnail data preparation listener.

Parameters:

l - Preparation listener. See ThumbnailHelper.OnPrepareListener

setOnThumbnailGetListener

public void setOnThumbnailGetListener(ThumbnailHelper.OnThumbnailGetListener l)

Set a thumbnail image retrieval callback.

Parameters:

l - Thumbnail image retrieval notification.

prepare

public void prepare()

Prepare thumbnail image data.

requestBitmapAtPosition

public void requestBitmapAtPosition(long positionMs)

Get the position of the thumbnail image. Call ThumbnailHelper.OnThumbnailGetListener to return the retrieval result.

Parameters:

positionMs - The position of the thumbnail image. Unit: milliseconds.