title: How to write query for deleting records in android?
body: <p>I am new in android. I made an app in which two buttons are there one is start_tracking and it will ask for how many hours you want to track. and other button is show_history in which it will show whatever u tracked. But I stuck in one place in which,if I want to track again and after that if I want to see history again it will delete the previous record and show the latest one.</p>