我读来自网络的原始图像。这个图像已经由图像传感器读取，而不是从文件中。

I am reading a raw image from the network. This image has been read by an image sensor, not from a file.

这些事情是我知道的形象： 〜身高和放大器;宽度 〜总大小（以字节为单位） 〜8位灰度 〜1个字节/像素

These are the things I know about the image: ~ Height & Width ~ Total size (in bytes) ~ 8-bit grayscale ~ 1 byte/pixel

我想这个图像转换为位图，以在ImageView的显示。

I'm trying to convert this image to a bitmap to display in an imageview.

下面是我的尝试：

BitmapFactory.Options opt = new BitmapFactory.Options();
opt.outHeight = shortHeight; //360
opt.outWidth = shortWidth;//248
imageBitmap = BitmapFactory.decodeByteArray(imageArray, 0, imageSize, opt);

德codeByteArray回报空，因为它不能去code我的形象。

decodeByteArray returns null, since it cannot decode my image.

我也试过直接从输入流中读取它，没有它转换为一个字节数组第一：

I also tried reading it directly from the input stream, without converting it to a Byte Array first:

imageBitmap = BitmapFactory.decodeStream(imageInputStream, null, opt);

这将返回空和

我搜索这个和放大器;其他论坛，但无法找到一种方法来实现这一目标。

I've searched on this & other forums, but cannot find a way to achieve this.

任何想法？

编辑：我要补充的是，第一件事是检查是否流实际上包含了原始图像。我这样做是使用其他应用程序`（iPhone / Windows的MFC）及所以能读它并正确显示图像。我只需要想出一个办法做到这一点的Java / Android的。

I should add that the first thing I did was to check if the stream actually contains the raw image. I did this using other applications `(iPhone/Windows MFC) & they are able to read it and display the image correctly. I just need to figure out a way to do this in Java/Android.

推荐答案

Android不支持灰度位图。所以第一件事情，你必须每一个字节扩展到32位ARGB INT。 Alpha是0xff的，并且R，G和B是源图像的字节的像素值的副本。然后在该阵列上面创建位图。

Android does not support grayscale bitmaps. So first thing, you have to extend every byte to an 32-bit ARGB int. Alpha is 0xff, and R, G and B are copies of the source image's byte pixel value. Then create the bitmap on top of that array.

另外（见注释），似乎该设备认为0是白色的，1是黑 - 我们有反转源位

Also (see comments), it seems that the device thinks that 0 is white, 1 is black - we have to invert the source bits.

所以，让我们假设源图像是名为src字节数组中开始。这里的code：

So, let's assume that the source image is in the byte array called Src. Here's the code:

byte [] Src; //Comes from somewhere...
byte [] Bits = new byte[Src.length*4]; //That's where the RGBA array goes.
int i;
for(i=0;i<Src.length;i++)
{
    Bits[i*4] =
        Bits[i*4+1] =
        Bits[i*4+2] = ~Src[i]; //Invert the source bits
    Bits[i*4+3] = -1;//0xff, that's the alpha.
}

//Now put these nice RGBA pixels into a Bitmap object

Bitmap bm = Bitmap.createBitmap(Width, Height, Bitmap.Config.ARGB_8888);
bm.copyPixelsFromBuffer(ByteBuffer.wrap(Bits));