[Oberon] Android

Liam Proven lproven at gmail.com
Wed Mar 7 12:45:03 CET 2018

On 7 March 2018 at 05:51,  <jwr at robrts.net> wrote:

> Does Android send a message to the running application(s) notifying that a
> portion of the screen needs to be redrawn?

I don't have a canonical answer, but a few general points:

* Android uses a 3D compositor called SurfaceFlinger, rather than
direct framebuffer access

* Android is not a windowing OS and as a general rule one app should
never be able to overlap part of another. Some enhancements support
tiling of 2 apps but that is all.

* The Notifications pull-down is the "official" way of requesting attention

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