图片压缩算法，保证图片不失真

在各种项目中，都难免遇到图片的上传和下载，然而，图片的上传，需要压缩后再上传才是明智之举；然后，压缩图片可能会导致图片的失真等等问题，在这里，我将在工作中使用的比较好的图片压缩方法，分享给大家。

 public static Bitmap revitionImage(String path) throws IOException {

        BufferedInputStream in = new BufferedInputStream(new FileInputStream(
                new File(path)));

        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeStream(in, null, options);

        int height = options.outHeight;
        int width = options.outWidth;
        int inSampleSize = 1;

        int reqHeight = 800;
        int reqWidth = 480;

        if (height > reqHeight || width > reqHeight) {
            final int heightRatio = Math.round((float) height / (float) reqHeight);
            final int widthRatio = Math.round((float) width / (float) reqWidth);
            inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
        }
        options.inJustDecodeBounds = false;
        options.inSampleSize = inSampleSize;
        Bitmap bitmap = BitmapFactory.decodeFile(path, options);

	 ByteArrayOutputStream baos = new ByteArrayOutputStream();

        bitmap.compress(Bitmap.CompressFormat.JPEG, 80, baos);
        byte[] b = baos.toByteArray();
        Bitmap result = BitmapFactory.decodeByteArray(b, 0, b.length);

        if (baos != null)
            baos.close();

        if (in != null)
            in.close();
        return result;
    }