无法清晰摄像头转换为位图 [英] Unable to clearly convert camera to bitmap

问题描述

当我运行code对camera.set previewCallback接下来的一位，我得到一个静态-Y形象。我怎样才能获得ImageView的（四）正确显示？我需要在这里发表更多code？请温柔，因为这是我的第一篇关于计算器 - 而且，是的，我找啊找，但没有发现任何东西，所以如果你发现一些已经问一个问题，很多在此先感谢

When I run the following bit of code on camera.setPreviewCallback, I get a static-y image. How can I get the ImageView (iv) to display correctly? Do I need to post more code here? Please be gentle as this is my first post on stackoverflow -- And, yes, I searched and searched, but didn't find anything, so if you find something that already asks the question, much thanks in advance.

YuvImage yuvImage = new YuvImage(data, ImageFormat.NV21, 300, 300, null);
ByteArrayOutputStream out = new ByteArrayOutputStream();
yuvImage.compressToJpeg(new Rect(0,0,300,300), 0, out);
byte[] imageBytes = out.toByteArray();
bitmap = BitmapFactory.decodeByteArray(imageBytes, 0, imageBytes.length);
iv.setImageBitmap(bitmap);

哦，是的，视口300×300。

Oh, and yes, the ViewPort is 300x300.

我甚至试过这个code：

I even tried this code:

int[] imageBytes = convertYUV420_NV21toRGB8888(data, 300, 300);
bitmap = Bitmap.createBitmap(300, 300, Bitmap.Config.ARGB_8888);
bitmap.setPixels(imageBytes, 0, 300, 0, 0, 300, 300);

它使用的计算器上的功能之一。

which uses one of the functions on stackoverflow.

推荐答案

我找到了解决办法。宽度和高度是不正确的。即使我有大小的一切，300x300的，解析问题引起的不被尺寸需要，所以这code终于摸索：

I found the solution. The width and height were incorrect. Even though I had sized everything as 300x300, resolution issues caused that to not be the dimensions needed, so this code finally worked:

Camera.Parameters parameters = camera.getParameters();

YuvImage im = new YuvImage(data, ImageFormat.NV21, parameters.getPreviewSize().width, parameters.getPreviewSize().height, null);
ByteArrayOutputStream out = new ByteArrayOutputStream();
im.compressToJpeg(new Rect(0,0,parameters.getPreviewSize().width, parameters.getPreviewSize().height), 100, out);
byte[] imageBytes = out.toByteArray();
bitmap = BitmapFactory.decodeByteArray(imageBytes, 0, out.size());
iv.setImageBitmap(bitmap);

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