Missing scope from request

The 'missing_scope' error indicates that while the app is permitted to use that scope, the particular access token you're using to make the API call does not have that scope granted. Also, be aware that just adding a scope to your app via the App Console does not retroactively grant that scope to existing access tokens.

That being the case, to make any API calls that require that scope, you'll need to get a new access token with that scope. It sounds like you've already done so though, so I also recommend checking the code you're running to process the authorization flow itself. While the scopes you enable on the App Console are used as the default scopes for the app, the app can also optionally specify a smaller set of scopes at authorization time. For example in this line of code in the sample app, it only requests "account_info.read" and "files.content.write". You would need to modify that if you want to request "files.content.read" as well.

Thanks for your reply Greg,

So do you mean remove the arrays completely to force use of defaults, like

DropboxActivity.startOAuth2Authentication(UserActivity.this, getString(R.string.app_key), null);

or actually add the files.content.read like

DropboxActivity.startOAuth2Authentication(UserActivity.this, getString(R.string.app_key), Arrays.asList("account_info.read", "files.content.read", "files.content.write"));

 I would prefer if it called all be controlled from the app on dropbox/developer

Thanks Greg, 

I changed it to null and after initially failing because the example app then tried to open the file but its format won't allow it. I commented out the link to view the file and its now appears to be working. Thanks for your help.

new DownloadFileTask(FilesActivity.this, DropboxClientFactory.getClient(), new DownloadFileTask.Callback() {
    @Override
    public void onDownloadComplete(File result) {
        dialog.dismiss();

        //if (result != null) {
        //    viewFileInExternalApp(result);
        //}
    }