android - DialogFragment with clear background (not dimmed)

Question

I'm trying to get the background of a DialogFragment to be completely clear.

With setting the style item android:windowIsFloating to true (the default), the DialogFragment displays exactly how I want it to, but has a very dimmed background.

By setting android:windowIsFloating to false, I get the clear background I want, but the DialogFragment blows up to about 95% of the screen, leaving only a tiny gap around it where you can see through to the view it overlays.

I've tried ton's of tweaks and cannot seem to override this behavior.

Do I need to use a PopupWindow to achieve the desired effects, or are there some style items that I can override ?

Answer 1

What works for me is to adjust the WinowManager.LayoutParams in onStart() of the DialogFragment:

@Override public void onStart() {
    super.onStart();

    Window window = getDialog().getWindow();
    WindowManager.LayoutParams windowParams = window.getAttributes();
    windowParams.dimAmount = 0.90f;
    windowParams.flags |= WindowManager.LayoutParams.FLAG_DIM_BEHIND;
    window.setAttributes(windowParams);
}