Android简单的获取SystemBar,StatusBar,NavigationBar的高度

            Resources res = getResources();            int navigationHeight = res.getIdentifier("navigation_bar_height", "dimen", "android");            navigationHeight = res.getDimensionPixelSize(navigationHeight);            int statusHeight = res.getIdentifier("status_bar_height", "dimen", "android");            statusHeight = res.getDimensionPixelSize(statusHeight);                   int systemHeight = res.getIdentifier("system_bar_height", "dimen", "android");            systemHeight = res.getDimensionPixelSize(systemHeight);