转换位图的ByteArray，反之亦然

本文介绍了转换位图的ByteArray，反之亦然的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在我的Andr​​oid应用程序，我想转换形象，从相机拍摄的，以字节数组，转换回位图来查看一个图像视图。我可以通过Bitmap preSS轻松地做到这一点。但我想这样做没有Bitmap preSS。问题是，我收到白线（较差的图像每次（线））

位图您好; //图像从摄像机里                        ByteBuffer的缓冲= ByteBuffer.allocate（hello.getByteCount（））;                        hello.copyPixelsToBuffer（缓冲液）;                        字节[] = bytes1 buffer.array（）;                        字节[]位=新的字节[bytes1.length * 4];                        INT I;                   对于（i = 0; I＆LT; bytes1.length;我++）                {                    位[我* 4] =                        位[我* 4 + 1] =                        位[我* 4 + 2] =（字节）〜bytes1 [I]; //反转源位                    位[我* 4 + 3] = -1; // 0xFF的，这是阿尔法。                }                位图bmimage = Bitmap.createBitmap（360248，Bitmap.Config.ARGB_8888）;                bmimage.copyPixelsFromBuffer（ByteBuffer.wrap（位））;                imageView11.setImageBitmap（bmimage）;

解决方案

位图的字节数组：

ByteArrayOutputStream流=新ByteArrayOutputStream（）;bmp preSS（Bitmap.Com pressFormat.PNG，100，流）;字节[] = imageBytes stream.toByteArray（）;

或

字节INT = bitmap.getByteCount（）;ByteBuffer的缓冲= ByteBuffer.allocate（字节）;bitmap.copyPixelsToBuffer（缓冲液）;byte []数组= buffer.array（）;

字节数组位图：

的InputStream的InputStream =新ByteArrayInputStream进行（字节）;  BitmapFactory.Options O =新BitmapFactory.Options（）;  BitmapFactory.de codeStream（InputStream中，空，O）;

In my android application i want to convert image ,taken from camera, to byte array and convert back to bitmap to view in a image view. I can do it easily through Bitmappress. But i want to do it without Bitmappress. The problem is that i am getting white lines (poor images every time(lines) )

Bitmap hello; //image coming from camera ByteBuffer buffer = ByteBuffer.allocate(hello.getByteCount()); hello.copyPixelsToBuffer(buffer); byte[] bytes1 = buffer.array(); byte [] Bits = new byte[bytes1.length*4]; int i; for(i=0;i<bytes1.length;i++) { Bits[i*4] = Bits[i*4+1] = Bits[i*4+2] = (byte) ~bytes1[i]; //Invert the source bits Bits[i*4+3] = -1;//0xff, that's the alpha. } Bitmap bmimage = Bitmap.createBitmap( 360,248, Bitmap.Config.ARGB_8888); bmimage.copyPixelsFromBuffer(ByteBuffer.wrap(Bits)); imageView11.setImageBitmap(bmimage);

解决方案

Bitmap to byte array:

ByteArrayOutputStream stream = new ByteArrayOutputStream(); bmppress(Bitmap.CompressFormat.PNG, 100, stream); byte[] imageBytes = stream.toByteArray();

or

int bytes = bitmap.getByteCount(); ByteBuffer buffer = ByteBuffer.allocate(bytes); bitmap.copyPixelsToBuffer(buffer); byte[] array = buffer.array();

byte array to Bitmap:

InputStream inputStream = new ByteArrayInputStream(bytes); BitmapFactory.Options o = new BitmapFactory.Options(); BitmapFactory.decodeStream(inputStream, null, o);