为什么我无法检索压缩位图?

我就是这么做的

FileOutputStream out = new FileOutputStream(
                        "/sdcard/Deltio1.jpg");
                Bitmap e = BitmapFactory.decodeByteArray(imageData, 0,
                        imageData.length);
                e.compress(Bitmap.CompressFormat.JPEG, 65, out);
                out.close();

去找回它

FileInputStream fin = new FileInputStream("/sdcard/Deltio1.jpg");
            ObjectInputStream in = new ObjectInputStream(fin);
            Bitmap bitmap;
              bitmap = (Bitmap) in.readObject();
              ImageView photo = (ImageView) findViewById(R.id.katagelia_photo);
              photo.setImageBitmap(bitmap);

它抛出java.io.StreamCorruptedException