保存Bitmap图像

/**
  * 保存文件
  * @param bm
  * @param fileName
  * @throws IOException
  */
 public void saveFile(Bitmap bm, String fileName) throws IOException {
  String path = getSDPath() +"/revoeye/";
     File dirFile = new File(path);
     if(!dirFile.exists()){
         dirFile.mkdir();
     }
     File myCaptureFile = new File(path + fileName);
     BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
     bm.compress(Bitmap.CompressFormat.JPEG, 80, bos);
     bos.flush();
     bos.close();
 }