The thing is, I dont know where to find the file location. The file that i want doesnt exist because i dont know what map to place it in
I've shown you a lot of sample blocks ...
and also how you can even implement this on all Android versions.
try the above ,if din't work try
file:///test_text.txt
If this don't work
file:///storage/emulated/0/test_text.txt
If din't work wait others will help
Say specific results for the above each code