Java 图片转字节流 实现 图片->字节流(字符串)->图片

//该方法实现图片转String   参数为图片的路径   可以是file.toString()得到
public String testUpload(String path) {
        try {

            String srcUrl = path; // "/mnt/sdcard/"; //路径
            // String fileName = PhotoName+".jpg"; //文件名
            FileInputStream fis = new FileInputStream(srcUrl);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[65536];
            int count = 0;
            while ((count = fis.read(buffer)) >= 0) {
                baos.write(buffer, 0, count);
            }
            String uploadBuffer = new String(Base64.encode(baos.toByteArray())); // 进行Base64编码
            fis.close();//这两行原来没有
            baos.flush();
            return uploadBuffer;

        } catch (Exception e) {
            e.printStackTrace();
        }
        // return soapObject;
        return null;

    }

//以下实现String转bitmap
String respon;//respon 为 图片转String得到的字符串

byte[] decode1 = Base64.decode(response ,Base64.DEFAULT);
          bitmap   bm1 = BitmapFactory.decodeByteArray(decode1, 0, decode1.length);
                downloadImgView.setImageBitmap(bm1);