java-當在bitmap 中存儲時DecodeStream拋出空值

當在bitmap 中存儲時DecodeStream拋出空值

使用下面的代碼，我在imageBitmap = BitmapFactory.decodeStream(is2,null, options);處獲取異常 NULL。

先前運行時，可以解碼，但是現在為什麼不行了呢？decodeStream 拋出 null嗎？

public void showImageThumb(FileInputStream is)
        {
            final int IMAGE_MAX_SIZE = 100;
            FileInputStream is2 = is;
            BitmapFactory.Options options=new BitmapFactory.Options();
            options.inSampleSize = 4;
            Bitmap imageBitmap = BitmapFactory.decodeStream(is,null, options);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            int height = options.outHeight;
            int width = options.outWidth;
            int scale = 1;
            if ( height > IMAGE_MAX_SIZE || width > IMAGE_MAX_SIZE) 
            {
                 scale = (int)Math.pow(2, (int) Math.round(Math.log(IMAGE_MAX_SIZE / (double) Math.max(options.outHeight, options.outWidth)) / Math.log(0.5)));
            }
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
            options = new BitmapFactory.Options();
            options.inSampleSize = scale*2;
            imageBitmap = BitmapFactory.decodeStream(is2,null, options);
            height = options.outHeight;
            width = options.outWidth;
            imageBitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos); //ERROR HERE 
            imageSelectedThumb = baos.toByteArray();

最佳回答：

版本2.2以下bug,是會出現概率性的解析失敗的異常
參考解決方案：
http://blog.csdn.net/catoop/article/details/8470031