Android - Is it possible to programatically disable certain functionality?

Question

Are the following actions possible using the latest version of the Android API?:

1. Temporarily disable sending text messages

2. Temporarily disable receiving text messages

   *Ideally, I would intercept them and queue them up for later delivery.

3. Temporarily disable incoming calls except from certain phone numbers

4. Temporarily disable outgoing calls except to certain phone numbers

Answer 1

You can turn on airplane mode, which disables all radios.

Beyond that, none of what you wish to do appears possible from an ordinary Android application.