I assume the problem was caused by uninstalling the game first. You can install the new apk file to update older game versions, it's not necessary to remove your old version first.
I know that the save files are in the system folder of the phone, not in the game folder, so someone reported that he kept his saves even after deleting his game similar to what you did, but there is no guarantee that this works on every phone.
Ah i see.. i usually uninstall it, and then i download the new version on the same day without clear the cache.. so maybe that time when i uninstall the game then i clear the cache, and the last i download the game, the save data got lost.. coz my phone has a little storage memory left.. so sometimes i have to clear the cache or uninstall some apps..