Changing screen brightness in Android emulator

Can screen brightness changes be tested in the Android emulator? I've tried various examples that all use the following code snippet:

WindowManager.LayoutP开发者_如何学Pythonarams lp = window.getAttributes();
lp.screenBrightness = (*some float percentage*);
window.setAttributes(lp);

But I don't see any change in brightness in the emulator. I've tested it in cupcake and 2.2.

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Brightness changes do not get reflected in the emulator. To confirm, you can check the phone settings in the emulator (Settings > Display > Brightness) and changing the brightness from there. It will not change.

To see the effects of changing the brightness, you'll need an actual device running android.