what if (view.viewTreeObserver.isAlive) is false and we won't viewTreeObserver.removeOnDrawListener(this)? Next onDraw callback will return just after firing forever?
The assumption is that if the view tree observer stops being alive then the views are detached from the window (e.g. activity destroyed) so the view tree observer will be gced and this won't fire again ever.
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if (view.viewTreeObserver.isAlive)is false and we won'tviewTreeObserver.removeOnDrawListener(this)? NextonDrawcallback will return just after firing forever?The assumption is that if the view tree observer stops being alive then the views are detached from the window (e.g. activity destroyed) so the view tree observer will be gced and this won't fire again ever.