Call end listener in Android

Question

I am developing an application in which I am storing call log details from CallLog provider.

Android stores call logs in a database and I am copying new rows from that database.

Now I want to copy call details when the user ends a call. For that I have used the PhoneStateListener with which I listen for state ringing, off hook and idle mode but after the call is ended the idle method calls more than once, so I cannot use that.

Second I used ContentObserver for call log table and it gives me onChanged event when Android inserts call details in it and at that time I copy those details into my database.

Is it that the proper way to use ContentObserver? Is there any other way to get details of new calls which is just ended?