Progress Listener for Downloads?

Hello,

Just wondering if anyone knows whether the Dropbox API Core (Java) supports some sort of ProgressListener capability OR will I need to write one myself?

I have a website that uses the old "dropbox-java-sdk v1.3" (org.syncloud) and this came with a class com.dropbox.client2.ProgressListener that could be used to update the UI for download progress such that the progress of larger downloads could be presented to the user i.e. % completed of total bytes read. My users now expect this so updating to below version I have regressed functionality (or so it seems).

<dependency>
  <groupId>com.dropbox.core</groupId>
  <artifactId>dropbox-core-sdk</artifactId>
  <version>[1.7,1.8)</version>
</dependency>

Anyone come across this problem or know of a solution?

Thanks in advance.