Where to put custom data

In a typical Android project you have the res/drawable directories where you can put images but I have some special custom binary files.

Where do I usually put them and can I access them via the R-class then?

Answer

Either in res/raw or res/assets. Read more in the Android docs.

About files in res/raw:

Arbitrary files to save in their raw
form. Files in here are not compressed
by the system. To open these resources
with a raw InputStream, call
Resources.openRawResource() with the
resource ID, which is R.raw.filename.

However, if you need access to
original file names and file
hierarchy, you might consider saving
some resources in the assets/
directory (instead of res/raw/). Files
in assets/ are not given a resource
ID, so you can read them only using
AssetManager.AssetManager.