How can I draw over the notification bar?

I need to draw a rectangle that is drawn over the notification bar, but I'm unable to get it to work. Th开发者_StackOverflow中文版e code looks like this:

canvas.drawRect(0,0, 200, 200, mLoadPaint);

But 0, 0 is just bellow the notification bar, instead of over it. How can I draw over the notification bar?

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Try changing the theme of your Activity to something like this one: http://developer.android.com/reference/android/R.style.html#Theme_Light_NoTitleBar_Fullscreen

<activity class="AddRssItem" android:label="Add an item" android:theme="@android:style/....