Используйте приложение APKPure
Историческую версию Text Viewer можно получить на Android
Text Viewer
[ Text Viewer ]
* Support Android 4.4.2 or later
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[ Supported file extension ]
1. *.txt, *.xml
2. *.htm, *.html
3. *.c, *.cpp, *.h, *.java, *.cs, *.js
4. *.php, *.css
5. *.log, *.ini