Getting the file complete path using box api

 The list of folders in the file path is contained in the `path_collection` field of the API response; you need to concatenate the names of all those folders.  Something like this should do the trick:

BoxFile.Info file = new BoxFile(api, fileID).getInfo();

String path = "";
for (BoxFolder.Info folder : file.getPathCollection()) {
    path += "/" + folder.getName();
}

path += file.getName();

// path contains a string like "/All Files/My Stuff/Document.pdf"

File object has an attribute called "path_collection."

You can look at this for more detail:

https://developer.box.com/reference/resources/file/#param-path_collection

We are getting the path of the File from API for example 

"/All Files/My Stuff/Document.pdf"

how to generate URL for it that works based on the path?

https://app.box.com/folder/