My 2.3.5 Android phone is set up to dim down the brightness after 30 seconds of inactivity, and shut off and lock the screen after another 30 seconds. After that, I need to unlock the screen to regain access to the running app. I would like to be able to keep a certain app with the screen accessible, while keeping the same configuration for any of the other apps. So instead of having a phone-wide system of brightness dimming, I would like to have an app-specific system. Any ideas?
That's easily possible using Tasker (I do the same for selected reading apps to increase the timeout to 2min, while also having the 30s default for all other apps):
Alternatively, in "Task" you could also let Tasker switching the keyguard off to disable the lock screen.
At least concerning the display timeout adjustment, this might be possible with other automation apps as well, such as Llama -- I'm not sure, as I use Tasker I don't use the others. Though Tasker might look a bit pricy (~5 EUR) and complicated, after you figured out how to use it you will find it worth every cent. Until then, there's a free trial available on their homepage.