title: How to decode base64 string and convert it into PDF/JPG and save it in storage
body: <p>I would like to decode a base64 string and turn it into a file (as PDF/JPG) and save it to device, how for example in (/storage/emulated/0/Download/file.pdf).</p>
  
  <p>For encode a file I use this code:</p>
  
  <pre><code>File originalFile = new File("/mnt/sdcard/download/file.pdf");
      String encodedBase64 = null;
      try {
          FileInputStream fileInputStreamReader = new FileInputStream(originalFile);
          byte[] bytes = new byte[(int) originalFile.length()];
          fileInputStreamReader.read(bytes);
          encodedBase64=Base64.encodeToString(bytes,Base64.NO_WRAP);
          messaggio=encodedBase64.toString();
          //encodedBase64 = new String(Base64.encode(bytes));
      } catch (FileNotFoundException e) {
          e.printStackTrace();
      } catch (IOException e) {
          e.printStackTrace();
      }
  </code></pre>
  
  <p>Now, I would like to decode this base64 string and convert it into a file and save it on the device.</p>