Android: Is there a reader for .hpprgm text files

[StephenG1CMZ]

If you mean Android file manager, I've just tried that again on Android 4.
Long pressing File Manager pops the File Manager into a window.
Browsing to a filename and Long Pressing the filename pops up a menu with other options (delete, details, ...but not text or open).
The file I used was a .py file recently extracted from a zip.

Using ThinkFreeViewer instead, on Android 4, long pressing gives an Open menu which leads to a not supported.

Which version of Android are you using? I've read some comments on stackoverflow suggesting Samsung's may have a problem.