How to select a file for subsequent upload?

Question

Android

As I understand it, there is no standard file selection window, can you tell me how to implement file selection? I found this Android File Dialog library, but it's not possible to download it...

Answer 1

Google, first lines:
stackoverflow.com/questions/7856959/android-file-c...
stackoverflow.com/questions/3592717/choose-file-dialog

Answer 2

Limit format - offset, count
Read the doc.
You select rows with 54720 in the amount of 54730