Which Java package for access to phone core settings?

[sychee]

Anyone can advise on which java package to use for changing core phone settings? eg. Ringer volume, Wi-fi on/off. Thanks.

[Queue29]

There is no one magic package that does everything. For example: changing the volume:
http://d.android.com/reference/android/media/AudioManager.html

Just google around for the specific things you need.