程序包 io.agora.chat.uikit.widget.video

类 EaseImageCache

java.lang.Object

io.agora.chat.uikit.widget.video.EaseImageCache

public class EaseImageCache
extends java.lang.Object

This class memory caching of bitmaps in conjunction with the EaseImageWorker class and its subclasses. Use getInstance(FragmentManager, ImageCacheParams) to get an instance of this class, although usually a cache should be added directly to an EaseImageWorker by calling EaseImageWorker.addImageCache(FragmentManager, ImageCacheParams) .

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	EaseImageCache.ImageCacheParams	A holder class that contains cache parameters.
static class	EaseImageCache.RetainFragment	A simple non-UI Fragment that stores a single Object and is retained over configuration changes.

方法概要

修饰符和类型	方法	说明
void	addBitmapToCache(java.lang.String data, android.graphics.drawable.BitmapDrawable value)	Adds a bitmap to both memory and disk cache.
void	clearCache()	Clears both the memory and disk cache associated with this ImageCache object.
android.graphics.drawable.BitmapDrawable	getBitmapFromMemCache(java.lang.String data)	Get from memory cache.
protected android.graphics.Bitmap	getBitmapFromReusableSet(android.graphics.BitmapFactory.Options options)
static int	getBitmapSize(android.graphics.drawable.BitmapDrawable value)	Get the size in bytes of a bitmap in a BitmapDrawable.
static java.io.File	getDiskCacheDir(android.content.Context context, java.lang.String uniqueName)	Get a usable cache directory (external if available, internal otherwise).
static java.io.File	getExternalCacheDir(android.content.Context context)	Get the external app cache directory.
static EaseImageCache	getInstance(androidx.fragment.app.FragmentManager fragmentManager, EaseImageCache.ImageCacheParams cacheParams)	Return an EaseImageCache instance.
static java.lang.String	hashKeyForDisk(java.lang.String key)	A hashing method that changes a string (like a URL) into a hash suitable for using as a disk filename.
static boolean	isExternalStorageRemovable()	Check if external storage is built-in or removable.

从类继承的方法 java.lang.Object

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

方法详细资料

getInstance

public static EaseImageCache getInstance(androidx.fragment.app.FragmentManager fragmentManager,
                                         EaseImageCache.ImageCacheParams cacheParams)

Return an EaseImageCache instance. A EaseImageCache.RetainFragment is used to retain the ImageCache object across configuration changes such as a change in device orientation.

参数:

fragmentManager - The fragment manager to use when dealing with the retained fragment.

cacheParams - The cache parameters to use if the ImageCache needs instantiation.

返回:

An existing retained ImageCache object or a new one if one did not exist

addBitmapToCache

public void addBitmapToCache(java.lang.String data,
                             android.graphics.drawable.BitmapDrawable value)

Adds a bitmap to both memory and disk cache.

参数:

data - Unique identifier for the bitmap to store

value - The bitmap drawable to store

getBitmapFromMemCache

public android.graphics.drawable.BitmapDrawable getBitmapFromMemCache(java.lang.String data)

Get from memory cache.

参数:

data - Unique identifier for which item to get

返回:

The bitmap drawable if found in cache, null otherwise

getBitmapFromReusableSet

protected android.graphics.Bitmap getBitmapFromReusableSet(android.graphics.BitmapFactory.Options options)

参数:

options - - BitmapFactory.Options with out* options populated

返回:

Bitmap that case be used for inBitmap

clearCache

public void clearCache()

Clears both the memory and disk cache associated with this ImageCache object. Note that this includes disk access so this should not be executed on the main/UI thread.

getDiskCacheDir

public static java.io.File getDiskCacheDir(android.content.Context context,
                                           java.lang.String uniqueName)

Get a usable cache directory (external if available, internal otherwise).

参数:

context - The context to use

uniqueName - A unique directory name to append to the cache dir

返回:

The cache dir

hashKeyForDisk

public static java.lang.String hashKeyForDisk(java.lang.String key)

A hashing method that changes a string (like a URL) into a hash suitable for using as a disk filename.

getBitmapSize

public static int getBitmapSize(android.graphics.drawable.BitmapDrawable value)

Get the size in bytes of a bitmap in a BitmapDrawable. Note that from Android 4.4 (KitKat) onward this returns the allocated memory size of the bitmap which can be larger than the actual bitmap data byte count (in the case it was re-used).

参数:

value -

返回:

size in bytes

isExternalStorageRemovable

public static boolean isExternalStorageRemovable()

Check if external storage is built-in or removable.

返回:

True if external storage is removable (like an SD card), false otherwise.

getExternalCacheDir

public static java.io.File getExternalCacheDir(android.content.Context context)

Get the external app cache directory.

参数:

context - The context to use

返回:

The external cache dir