Avoid Conflict between the events in google calendar android

I'm creating an android app that creates an event in google calendar using app.

Now it is creating an event properly, but there is a problem. If I schedule the first event from 1pm to 3pm, it should not create a second event if it is on 1.30pm to 2pm on the same day.

So what I'm saying is I want to avoid time conflict (double booking) between the time in same date.

Thanks in advance