标签:des android blog http io ar os java for
//保存一张照片 String fileName = "IMG_" + String.valueOf(index) + ".jpg"; //jpeg文件名定义 File sdRoot = Environment.getExternalStorageDirectory(); //系统路径 String dir = "/jpeg/"; //文件夹名 File mkDir = new File(sdRoot, dir); if (!mkDir.exists()) { mkDir.mkdirs(); //目录不存在,则创建 } File pictureFile = new File(sdRoot, dir + fileName); if (!pictureFile.exists()) { try { pictureFile.createNewFile(); FileOutputStream filecon = new FileOutputStream(pictureFile); YuvImage image = new YuvImage(data, ImageFormat.NV21, width, height, null); //将NV21 data保存成YuvImage //图像压缩 image.compressToJpeg( new Rect(0, 0, image.getWidth(), image.getHeight()), 70, filecon); // 将NV21格式图片,以质量70压缩成Jpeg,并得到JPEG数据流 }catch (IOException e) { e.printStackTrace(); } }
Camera.PreviewCallback
中采用:
@Override public void onPreviewFrame(byte[] data, Camera camera) { }
将NV21数据压缩成JPEG,并得到JPEG byte数据,解压JPEG byte数据成一张Bitmap
@Override public void onPreviewFrame(byte[] bytes, Camera camera) { YuvImage image = new YuvImage(bytes, ImageFormat.NV21, width, height, null); //ImageFormat.NV21 640 480 ByteArrayOutputStream outputSteam = new ByteArrayOutputStream(); image.compressToJpeg(new Rect(0, 0, image.getWidth(), image.getHeight()), 70, outputSteam); // 将NV21格式图片,以质量70压缩成Jpeg,并得到JPEG数据流 byte[] jpegData = outputSteam.toByteArray(); //从outputSteam得到byte数据 Options options = new BitmapFactory.Options(); options.inSampleSize = 1; Bitmap bmp = BitmapFactory.decodeStream(jpegData, null, options); }
http://my.oschina.net/eclipse88/blog/80115
标签:des android blog http io ar os java for
原文地址:http://blog.csdn.net/tanmengwen/article/details/41412425