【flutter快记】

获取状态栏高度

final double statusHeight = MediaQueryData.fromWindow(WidgetsBinding.instance.window).padding.top;

获取屏幕宽度

final double screenWidth = MediaQuery.of(context).size.width;

获取屏幕高度

final double screenHeight = MediaQuery.of(context).size.height;

AppBar高度

const double appBarHeight = 56.0;