com.nostra13.universalimageloader.core.decode

类 BaseImageDecoder

java.lang.Object

com.nostra13.universalimageloader.core.decode.BaseImageDecoder

所有已实现的接口:

ImageDecoder

public class BaseImageDecoder
extends Object
implements ImageDecoder

Decodes images to Bitmap, scales them to needed size

从以下版本开始:

1.8.3

另请参阅:

ImageDecodingInfo

嵌套类概要

嵌套类

限定符和类型	类和说明
protected static class	BaseImageDecoder.ExifInfo
protected static class	BaseImageDecoder.ImageFileInfo

字段概要

字段

限定符和类型	字段和说明
protected static String	ERROR_CANT_DECODE_IMAGE
protected static String	ERROR_NO_IMAGE_STREAM
protected static String	LOG_FLIP_IMAGE
protected static String	LOG_ROTATE_IMAGE
protected static String	LOG_SCALE_IMAGE
protected static String	LOG_SUBSAMPLE_IMAGE
protected boolean	loggingEnabled

构造器概要

构造器

构造器和说明
BaseImageDecoder(boolean loggingEnabled)

方法概要

限定符和类型	方法和说明
protected android.graphics.Bitmap	considerExactScaleAndOrientatiton(android.graphics.Bitmap subsampledBitmap, ImageDecodingInfo decodingInfo, int rotation, boolean flipHorizontal)
android.graphics.Bitmap	decode(ImageDecodingInfo decodingInfo) Decodes image from URI into Bitmap.
protected BaseImageDecoder.ExifInfo	defineExifOrientation(String imageUri)
protected BaseImageDecoder.ImageFileInfo	defineImageSizeAndRotation(InputStream imageStream, ImageDecodingInfo decodingInfo)
protected InputStream	getImageStream(ImageDecodingInfo decodingInfo)
protected android.graphics.BitmapFactory.Options	prepareDecodingOptions(ImageSize imageSize, ImageDecodingInfo decodingInfo)
protected InputStream	resetStream(InputStream imageStream, ImageDecodingInfo decodingInfo)

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

LOG_SUBSAMPLE_IMAGE

protected static final String LOG_SUBSAMPLE_IMAGE

另请参阅:

常量字段值

LOG_SCALE_IMAGE

protected static final String LOG_SCALE_IMAGE

另请参阅:

常量字段值

LOG_ROTATE_IMAGE

protected static final String LOG_ROTATE_IMAGE

另请参阅:

常量字段值

LOG_FLIP_IMAGE

protected static final String LOG_FLIP_IMAGE

另请参阅:

常量字段值

ERROR_NO_IMAGE_STREAM

protected static final String ERROR_NO_IMAGE_STREAM

另请参阅:

常量字段值

ERROR_CANT_DECODE_IMAGE

protected static final String ERROR_CANT_DECODE_IMAGE

另请参阅:

常量字段值

loggingEnabled

protected final boolean loggingEnabled

构造器详细资料

BaseImageDecoder

public BaseImageDecoder(boolean loggingEnabled)

参数:

loggingEnabled - Whether debug logs will be written to LogCat. Usually should match ImageLoaderConfiguration.writeDebugLogs()

方法详细资料

decode

public android.graphics.Bitmap decode(ImageDecodingInfo decodingInfo)
                               throws IOException

Decodes image from URI into Bitmap. Image is scaled close to incoming target size during decoding (depend on incoming parameters).

指定者:

decode 在接口中 ImageDecoder

参数:

decodingInfo - Needed data for decoding image

返回:

Decoded bitmap

抛出:

IOException - if some I/O exception occurs during image reading

UnsupportedOperationException - if image URI has unsupported scheme(protocol)

getImageStream

protected InputStream getImageStream(ImageDecodingInfo decodingInfo)
                              throws IOException

抛出:

IOException

defineImageSizeAndRotation

protected BaseImageDecoder.ImageFileInfo defineImageSizeAndRotation(InputStream imageStream,
                                                                    ImageDecodingInfo decodingInfo)
                                                             throws IOException

抛出:

IOException

defineExifOrientation

protected BaseImageDecoder.ExifInfo defineExifOrientation(String imageUri)

prepareDecodingOptions

protected android.graphics.BitmapFactory.Options prepareDecodingOptions(ImageSize imageSize,
                                                                        ImageDecodingInfo decodingInfo)

resetStream

protected InputStream resetStream(InputStream imageStream,
                                  ImageDecodingInfo decodingInfo)
                           throws IOException

抛出:

IOException

considerExactScaleAndOrientatiton

protected android.graphics.Bitmap considerExactScaleAndOrientatiton(android.graphics.Bitmap subsampledBitmap,
                                                                    ImageDecodingInfo decodingInfo,
                                                                    int rotation,
                                                                    boolean flipHorizontal)