Android : Android: How to update the sqlite database from application?

Developing for the Simple Database apk. I'm using sqlite db to get data that are stored in assets folder. In My Launcher activity show the data using listview from db. When click on listview item it will take to Next Activity(Detail Info) and show Name, address and phno from db that are related to item that user click. On the Next Activity, I want to add button(Edit Info) and button(Edit Location) that will take to another activity(Edit Info Activity) for a item.

Here is the Architecture: Main Activity(List View) --> Next Activity(Detail Info)(When click on Edit Info Button) --> Another Activity(Edit Info)(Show Edit Text for Name, Address, ph) and save

I'm no sure how to edit data and update to my database that user edited. Can Anybody help me?