Yes, read only. What exactly do you mean by move app window on the screen? The activity pertains to the whole screen. Are you trying to position a layout file (.bal)? If so, you can load the layout file on a panel and move the panel around.
I'm using android:theme="@android:style/Theme.Panel" in the manifest so the app is a window on a big laptop. But that does no good if the app hogs the whole screen anyway.
I'll try the transparent panel. It's not Plan A, but it's not a deal breaker either.
But I don't get the SetLayout function. It looks like its purpose is to set the size and placement of the activity, but that doesn't seem to work. And the Android API has class members to set the height and width of the application, but not the left or top placement. So I'm not sure what SetLayout is trying to do.