1.通过MediaQuery.removePadding可以移除元素的pandding，需要注意要指定移除哪个方向的padding，例如移除上面的padding
MediaQuery.removePadding(
removeTop: true,
context: context,
child: ,
)
2.获取状态栏高度
import 'dart:ui';
MediaQueryData.fromWindow(window).padding.top
同时我们也可以在flutter/src/material/constants.dart中查看flutter自带的AppBar的默认参数
/// The height of the toolbar component of the [AppBar].
const double kToolbarHeight = 56.0;
/// The height of the bottom navigation bar.
const double kBottomNavigationBarHeight = 56.0;
3.引入官方webview_flutter: ^0.3.7+1 ，提示错误需要使用AndroidX
' *********************************************************'
' WARNING: This version of ' + PLUGIN + ' will break your Android build if it or its dependencies aren\'t compatible with AndroidX.'
' See https://goo.gl/CP92wY for more information on the problem and how to fix it.'
' This warning prints for all Android build failures. The real root cause of the error may be unrelated.'
' *********************************************************'
解决方法：
打开flutter的android宿主项目点击Refactor-Migrate to AndroidX
image.png
接下来再弹出的窗口点击Do Refactor 让Android Studio自动将项目转化为AndroidX依赖
转化完毕后可以clean Project看看还有其他错误没，没有错误后回到Flutter项目运行即可
