battleport.blogg.se - Android code dim the display windowmanager

ANDROID CODE DIM THE DISPLAY WINDOWMANAGER HOW TO
ANDROID CODE DIM THE DISPLAY WINDOWMANAGER ANDROID
ANDROID CODE DIM THE DISPLAY WINDOWMANAGER PLUS

So normally you don't need to worry about windows - you just create an activity and Android will do the rest for you.īut you need to interact with the WindowManager if you want to do something unusual like create floating windows that don't fill the screen. The default window fills the screen, so that your activity's window hides any other activities - the WindowManager will display whichever window is on top.

When you call setContentView on an activity, it attaches that view to the activity's default window. Among other things, it automatically performs window transitions and animations when opening or closing an app or rotating the screen.Įvery activity has a Window that is used to display its content on the screen. You can also control screen-on with the android:keepScreenOn attribute in the layout XML.The Android WindowManager is a system service, which is responsible for managing the z-ordered list of windows, which windows are visible, and how they are laid out on screen. It will keep the screen on as long as the view is visible. GetActivity().getWindow().clearFlags(_KEEP_SCREEN_ON) Īnother method for controlling the screen that is more convenient in some cases is tKeepScreenOn(). GetActivity().getWindow().addFlags(_KEEP_SCREEN_ON) įor those you what to have normal screen dimming and turn-off do: When each fragment is selected from the navigation drawer, for those you want to have the screen kept on do: Anyway, this is handy to use if your need to keep the screen active is associated with a particular view in your app. I suspect works by setting the on the window for you whenever the view is visible to the user.

ANDROID CODE DIM THE DISPLAY WINDOWMANAGER PLUS

This should be as easy as simply setting the attribute in the XML layout you use to define your views, plus it needs no Java code at all. android:keepScreenOnĪlthough I haven’t tried this in my own dev work, you can also enforce “screen always on” behavior on a per-view basis.Įvery view has an attribute that you can use to keep the screen active whenever the view is visible.

ANDROID CODE DIM THE DISPLAY WINDOWMANAGER HOW TO

I won’t discuss how to create and manage a Wake Lock directly instead, I’ll refer you to the SDK docs and to a short code example (I happen to like the site for its nice, short and useful code snippets). If you directly create and manage a raw wake lock in your own code, you have more granularity, for example allowing the screen to go dim or go off completely whilst still allowing the CPU to do its thing. does just that it keeps the screen active along with the rest of the device.That might be fine for your use case, but if you have a long-running background task that really needs to keep the device running until finished, this isn’t an airtight approach.

If the user switches apps, Android automatically releases the wake lock.

only works when the app window is onscreen.

There are two things to keep in mind with this approach: I’ve already covered the technique of setting a flag on your Activity’s main window to keep the screen active: In this post, I’d like to further elaborate on the “shortcut” techniques to allow you to keep the screen alive, without explicitly managing a Wake Lock in your application. In previous post, we discussed the pros and cons of the various means of keeping the screen alive in Android, focusing mainly on the need for sandbox permissions in your application’s file.