Welcome to Android Forums! Sorry for the slow response.
There are a number of apps on the Play Store that will allow you to download topographical maps for use offline. They vary in cost and functionality.
The one I use is called Backcountry Navigator Pro GPS. It costs $10(US). There is a free trial that would allow you to check its functionality and what detail level of maps are available.
I hope this helps! If not, there are two avenues: You can re-submit your question with additional info the same way you submitted this one, or you can join the forums for a better back and forth exchange of info.
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