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Added in API level 8
Summary: Ctors | Methods | Inherited Methods | [Expand All]

YuvImage

public class YuvImage
extends Object

java.lang.Object
   ↳ android.graphics.YuvImage

YuvImage包含YUV数据并提供了一种将YUV数据的区域压缩为Jpeg的方法。 YUV数据应该作为单字节数组提供，而不管其中的图像平面的数量如何。 目前只支持ImageFormat.NV21和ImageFormat.YUY2。 要压缩YUV数据中的矩形区域，用户必须按左，顶部，宽度和高度指定区域。

Summary

Public constructors
YuvImage(byte[] yuv, int format, int width, int height, int[] strides)

构建一个YuvImage。

Public methods
boolean compressToJpeg(Rect rectangle, int quality, OutputStream stream)

将YuvImage中的矩形区域压缩为jpeg。
int getHeight()
int[] getStrides()
int getWidth()
byte[] getYuvData()
int getYuvFormat()

Inherited methods
From class java.lang.Object

Public constructors

YuvImage

Added in API level 8 
YuvImage (byte[] yuv, 
                int format, 
                int width, 
                int height, 
                int[] strides)

构建一个YuvImage。

Parameters
yuv byte: The YUV data. In the case of more than one image plane, all the planes must be concatenated into a single byte array.
format int: The YUV data format as defined in ImageFormat.
width int: The width of the YuvImage.
height int: The height of the YuvImage.
strides int: (Optional) Row bytes of each image plane. If yuv contains padding, the stride of each image must be provided. If strides is null, the method assumes no padding and derives the row bytes by format and width itself.
Throws
IllegalArgumentException if format is not support; width or height <= 0; or yuv is null.

Public methods

compressToJpeg

Added in API level 8 
boolean compressToJpeg (Rect rectangle, 
                int quality, 
                OutputStream stream)

将YuvImage中的矩形区域压缩为jpeg。 目前只支持ImageFormat.NV21和ImageFormat.YUY2。

Parameters
rectangle Rect: The rectangle region to be compressed. The medthod checks if rectangle is inside the image. Also, the method modifies rectangle if the chroma pixels in it are not matched with the luma pixels in it.
quality int: Hint to the compressor, 0-100. 0 meaning compress for small size, 100 meaning compress for max quality.
stream OutputStream: OutputStream to write the compressed data.
Returns
boolean True if the compression is successful.
Throws
IllegalArgumentException if rectangle is invalid; quality is not within [0, 100]; or stream is null.

getHeight

Added in API level 8 
int getHeight ()

Returns
int the height of the image.

getStrides

Added in API level 8 
int[] getStrides ()

Returns
int[] the number of row bytes in each image plane.

getWidth

Added in API level 8 
int getWidth ()

Returns
int the width of the image.

getYuvData

Added in API level 8 
byte[] getYuvData ()

Returns
byte[] the YUV data.

getYuvFormat

Added in API level 8 
int getYuvFormat ()

Returns
int the YUV format as defined in ImageFormat.
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