As Siddharth Lele mentions in the comments, you cannot update assets/
at runtime, except by upgrading the app to one that contains a newer assets/
.
You can, however, download your .dat
and .xml
files to internal storage. Then, when you need to use one of these files, check internal storage first. If there is a file there, use it. If not, fall back to the copy in assets/
.