How to access SQLite database inside a zip file - android

I have 180 MB SQLite database. If I compress it, it will be just around 40 MB. I keep the file in asset folder and there's no problem in apk size as it is compressed in apk.

But when I copy the db file from the asset folder to phone memory or SD card, then it's 180 MB.

So, is there any way to use compressed db file in android?