Android: Sleep stages/levels on an Android device?

Question

Is there a notion of sleep stages/levels on Android?

From browsing the mailing lists, I\'m aware that there exist a stage called \"Deep Sleep\". Do execution for al

Answer 1

From browsing the mailing lists, I'm aware that there exist a stage called "Deep Sleep".

There is not really a separate stage called "deep sleep". There is only "awake", "asleep", and "off".

Do execution for all apps halt when device reaches this state?

Execution of all processes ceases when the device goes to sleep or is powered off.

If so, besides user hitting the power button, what else could wake the device back up?

• An alarm from AlarmManager
• An incoming phone call
• An incoming text message
• If you have a socket open on wireless data (not WiFi), an incoming packet on that socket

Those are the big ones. There might be others.