Can we display Notifications in our activity other than status bar?

I wanted to display latest messages and incoming call alerts in my activity. Can I override that in 开发者_Go百科my activity inside a list view?

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Yes, it's possible and you can use the call log. You should familiarize yourself with

http://developer.android.com/reference/android/provider/CallLog.Calls.html

and content providers

http://developer.android.com/guide/topics/providers/content-providers.html

As for SMS, please see this question:

How can I read SMS messages from the device programmatically in Android?