Modding:Installing SMAPI on Android
!!!READ THIS NOTE!!! Mod at your own risk, not all mods will be compatible with android. User has the full responsibility of ensuring they do not cause damage by following this guide.
1) Install zip program of your choice. Recommended: 7zip
2) Install JDK 8
3) Install Android Studio, make sure to install build-tools
4) Install APK Signer Tool (v2)
5) Unpack Stardew Valley apk to computer with zip program.
6) Insert xnb mods into content folder
7) Repack Stardew Valley apk with zip program, rename from .zip to .apk
8) Open APK Signer Tool (v2)
9) Fill out all fields in Keyfile Generator page. (fill as you wish, these aren't important as long as they are filled)
10) Click Align & Sign tab. Browse for modded .apk
11) Select key, and fill out appropriate fields
12) Click Align and Sign
13) Wait a few moments
14) Move apk to device and install