Android and ZIP file loader

I have implemented a basic application that loads a zip file(from asset folder) and reads its contents.
This application consists of 2 activities, in the first you can load the file, select the file to be displayed, and finally open the second acivity to examine the previously selected file, in the second activity you can only read the contents of the file extracted from the zip archive.
The code is really simple and you can examine it at this gitlab page:
here some screenshoot:

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