com.nostra13.universalimageloader.cache.disc.impl.ext

类 LruDiskCache

java.lang.Object

com.nostra13.universalimageloader.cache.disc.impl.ext.LruDiskCache

所有已实现的接口:

DiskCache

public class LruDiskCache
extends Object
implements DiskCache

Disk cache based on "Least-Recently Used" principle. Adapter pattern, adapts DiskLruCache to DiskCache

从以下版本开始:

1.9.2

另请参阅:

FileNameGenerator

字段概要

字段

限定符和类型	字段和说明
protected int	bufferSize
protected com.nostra13.universalimageloader.cache.disc.impl.ext.DiskLruCache	cache
protected android.graphics.Bitmap.CompressFormat	compressFormat
protected int	compressQuality
static int	DEFAULT_BUFFER_SIZE {@value
static android.graphics.Bitmap.CompressFormat	DEFAULT_COMPRESS_FORMAT {@value
static int	DEFAULT_COMPRESS_QUALITY {@value
protected FileNameGenerator	fileNameGenerator

构造器概要

构造器

构造器和说明
LruDiskCache(File cacheDir, File reserveCacheDir, FileNameGenerator fileNameGenerator, long cacheMaxSize, int cacheMaxFileCount)
LruDiskCache(File cacheDir, FileNameGenerator fileNameGenerator, long cacheMaxSize)

方法概要

限定符和类型	方法和说明
void	clear() Clears disk cache.
void	close() Closes disk cache, releases resources.
File	get(String imageUri) Returns file of cached image
File	getDirectory() Returns root directory of disk cache
boolean	remove(String imageUri) Removes image file associated with incoming URI
boolean	save(String imageUri, android.graphics.Bitmap bitmap) Saves image bitmap in disk cache.
boolean	save(String imageUri, InputStream imageStream, IoUtils.CopyListener listener) Saves image stream in disk cache.
void	setBufferSize(int bufferSize)
void	setCompressFormat(android.graphics.Bitmap.CompressFormat compressFormat)
void	setCompressQuality(int compressQuality)

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

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

{@value

另请参阅:

常量字段值

DEFAULT_COMPRESS_FORMAT

public static final android.graphics.Bitmap.CompressFormat DEFAULT_COMPRESS_FORMAT

{@value

DEFAULT_COMPRESS_QUALITY

public static final int DEFAULT_COMPRESS_QUALITY

{@value

另请参阅:

常量字段值

cache

protected com.nostra13.universalimageloader.cache.disc.impl.ext.DiskLruCache cache

fileNameGenerator

protected final FileNameGenerator fileNameGenerator

bufferSize

protected int bufferSize

compressFormat

protected android.graphics.Bitmap.CompressFormat compressFormat

compressQuality

protected int compressQuality

构造器详细资料

LruDiskCache

public LruDiskCache(File cacheDir,
                    FileNameGenerator fileNameGenerator,
                    long cacheMaxSize)
             throws IOException

参数:

cacheDir - Directory for file caching

fileNameGenerator - Name generator for cached files. Generated names must match the regex [a-z0-9_-]{1,64}

cacheMaxSize - Max cache size in bytes. 0 means cache size is unlimited.

抛出:

IOException - if cache can't be initialized (e.g. "No space left on device")

LruDiskCache

public LruDiskCache(File cacheDir,
                    File reserveCacheDir,
                    FileNameGenerator fileNameGenerator,
                    long cacheMaxSize,
                    int cacheMaxFileCount)
             throws IOException

参数:

cacheDir - Directory for file caching

reserveCacheDir - null-ok; Reserve directory for file caching. It's used when the primary directory isn't available.

fileNameGenerator - Name generator for cached files. Generated names must match the regex [a-z0-9_-]{1,64}

cacheMaxSize - Max cache size in bytes. 0 means cache size is unlimited.

cacheMaxFileCount - Max file count in cache. 0 means file count is unlimited.

抛出:

IOException - if cache can't be initialized (e.g. "No space left on device")

方法详细资料

getDirectory

public File getDirectory()

从接口复制的说明: DiskCache

Returns root directory of disk cache

指定者:

getDirectory 在接口中 DiskCache

返回:

Root directory of disk cache

get

public File get(String imageUri)

从接口复制的说明: DiskCache

Returns file of cached image

指定者:

get 在接口中 DiskCache

参数:

imageUri - Original image URI

返回:

File of cached image or null if image wasn't cached

save

public boolean save(String imageUri,
                    InputStream imageStream,
                    IoUtils.CopyListener listener)
             throws IOException

从接口复制的说明: DiskCache

Saves image stream in disk cache. Incoming image stream shouldn't be closed in this method.

指定者:

save 在接口中 DiskCache

参数:

imageUri - Original image URI

imageStream - Input stream of image (shouldn't be closed in this method)

listener - Listener for saving progress, can be ignored if you don't use progress listener in ImageLoader calls

返回:

true - if image was saved successfully; false - if image wasn't saved in disk cache.

抛出:

IOException

save

public boolean save(String imageUri,
                    android.graphics.Bitmap bitmap)
             throws IOException

从接口复制的说明: DiskCache

Saves image bitmap in disk cache.

指定者:

save 在接口中 DiskCache

参数:

imageUri - Original image URI

bitmap - Image bitmap

返回:

true - if bitmap was saved successfully; false - if bitmap wasn't saved in disk cache.

抛出:

IOException

remove

public boolean remove(String imageUri)

从接口复制的说明: DiskCache

Removes image file associated with incoming URI

指定者:

remove 在接口中 DiskCache

参数:

imageUri - Image URI

返回:

true - if image file is deleted successfully; false - if image file doesn't exist for incoming URI or image file can't be deleted.

close

public void close()

从接口复制的说明: DiskCache

Closes disk cache, releases resources.

指定者:

close 在接口中 DiskCache

clear

public void clear()

从接口复制的说明: DiskCache

Clears disk cache.

指定者:

clear 在接口中 DiskCache

setBufferSize

public void setBufferSize(int bufferSize)

setCompressFormat

public void setCompressFormat(android.graphics.Bitmap.CompressFormat compressFormat)

setCompressQuality

public void setCompressQuality(int compressQuality)