Not able to fetch all files and folder

No there isnt at all BUT there can be restrictions based upon characters depending upon the OS. 

Can you see all of the files at www.dropbox.com/home ?

yes I can see all files and folder on web to follow this link www.dropbox.com/home.
But I am using this code that not response all files and folder.

    DbxClientV2 mDbxClient = new DbxClientV2(DbxRequestConfigFactory.getRequestConfig(), accessToken);
try {
ListFolderResult listFolderResult= mDbxClient.files().listFolder("");

for (Metadata metadata : listFolderResult.getEntries()) {
String fileName = metadata.getName();
Log.i("Fetch File", "file: " + fileName);
}
} catch (DbxException e) {
e.printStackTrace();
}

[Cross-linking for reference: https://github.com/dropbox/dropbox-sdk-java/issues/520 ]

pramodkr200 I understand that you are attempting to list all files/folders using listFolder. Note that this functionality is paginated and you are not guaranteed to get all of the results back in a single listFolder call, so make sure you implement support for listFolderContinue as well.

There are a few factors that can affect what/how much is returned in a single call, and that can vary over time due to a number of factors, e.g., as the state and contents of the account changes, etc, so you need to make sure you always have that implemented as documented.

Refer to the listFolder and listFolderContinue documentation for information on doing so.