io.rong.imkit.picture.widget.longimage

类 SkiaImageRegionDecoder

java.lang.Object

io.rong.imkit.picture.widget.longimage.SkiaImageRegionDecoder

所有已实现的接口:

ImageRegionDecoder

public class SkiaImageRegionDecoder
extends java.lang.Object
implements ImageRegionDecoder

Default implementation of com.davemorrissey.labs.subscaleview.decoder.ImageRegionDecoder using Android's BitmapRegionDecoder, based on the Skia library. This works well in most circumstances and has reasonable performance due to the cached decoder instance, however it has some problems with grayscale, indexed and CMYK images.

构造器概要

构造器

构造器和说明
SkiaImageRegionDecoder()

方法概要

限定符和类型	方法和说明
android.graphics.Bitmap	decodeRegion(android.graphics.Rect sRect, int sampleSize) Decode a region of the image with the given sample size.
android.graphics.Point	init(android.content.Context context, android.net.Uri uri) Initialise the decoder.
boolean	isReady() Status check.
void	recycle() This method will be called when the decoder is no longer required.

从类继承的方法 java.lang.Object

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

构造器详细资料

SkiaImageRegionDecoder

public SkiaImageRegionDecoder()

方法详细资料

init

public android.graphics.Point init(android.content.Context context,
                                   android.net.Uri uri)
                            throws java.lang.Exception

从接口复制的说明: ImageRegionDecoder

Initialise the decoder. When possible, initial setup work once in this method. This method must return the dimensions of the image. The URI can be in one of the following formats: File: file:///scard/picture.jpg Asset: file:///android_asset/picture.png Resource: android.resource://com.example.app/drawable/picture

指定者:

init 在接口中 ImageRegionDecoder

参数:

context - Application context. A reference may be held, but must be cleared on recycle.

uri - URI of the image.

返回:

Dimensions of the image.

抛出:

java.lang.Exception - if initialisation fails.

decodeRegion

public android.graphics.Bitmap decodeRegion(android.graphics.Rect sRect,
                                            int sampleSize)

从接口复制的说明: ImageRegionDecoder

Decode a region of the image with the given sample size. This method is called off the UI thread so it can safely load the image on the current thread. It is called from an AsyncTask running in a single threaded executor, and while a synchronization lock is held on this object, so will never be called concurrently even if the decoder implementation supports it.

指定者:

decodeRegion 在接口中 ImageRegionDecoder

参数:

sRect - Source image rectangle to decode.

sampleSize - Sample size.

返回:

The decoded region. It is safe to return null if decoding fails.

isReady

public boolean isReady()

从接口复制的说明: ImageRegionDecoder

Status check. Should return false before initialisation and after recycle.

指定者:

isReady 在接口中 ImageRegionDecoder

返回:

true if the decoder is ready to be used.

recycle

public void recycle()

从接口复制的说明: ImageRegionDecoder

This method will be called when the decoder is no longer required. It should clean up any resources still in use.

指定者:

recycle 在接口中 ImageRegionDecoder