Merge pull request #291 from NishadAvnish/support_for_split_screen

Support for split screen

 #!/bin/sh
 # This is a generated file; do not edit or check into version control.
-export "FLUTTER_ROOT=/Users/lizhuoyuan/Development/flutter"
-export "FLUTTER_APPLICATION_PATH=/Users/lizhuoyuan/Development/Project/flutter_screenutil/example"
+export "FLUTTER_ROOT=C:\flutter"
+export "FLUTTER_APPLICATION_PATH=C:\Users\Avnish\Downloads\flutter_screenutil\example"
 export "COCOAPODS_PARALLEL_CODE_SIGN=true"
-export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_TARGET=lib\main.dart"
 export "FLUTTER_BUILD_DIR=build"
-export "SYMROOT=${SOURCE_ROOT}/../build/ios"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
 export "DART_OBFUSCATION=false"

+import 'dart:ui';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 
@@ -50,7 +52,7 @@ class _HomePageState extends State<HomePage> {
                 Container(
                   padding: EdgeInsets.all(ScreenUtil().setWidth(10)),
                   width: 180.w,
-                  height: 200.h,
+                  height: 120.h,
                   color: Colors.red,
                   child: Text(
                     '我的实际宽度:${180.w}dp \n'

@@ -7,6 +7,7 @@ library flutter_screenutil;
 
 import 'dart:math';
 import 'dart:ui' as ui;
+import 'dart:ui';
 
 import 'package:flutter/material.dart';
 

@@ -5,10 +5,12 @@ class ScreenUtilInit extends StatelessWidget {
   ScreenUtilInit({
     required this.builder,
     this.designSize = ScreenUtil.defaultSize,
+    this.splitScreenMode = true,
     Key? key,
   }) : super(key: key);
 
   final Widget Function() builder;
+  final bool splitScreenMode;
 
   /// The [Size] of the device in the design draft, in dp
   final Size designSize;
@@ -16,8 +18,17 @@ class ScreenUtilInit extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return LayoutBuilder(builder: (_, BoxConstraints constraints) {
+      if (splitScreenMode) {
+        constraints = BoxConstraints(
+            minHeight: constraints.minHeight,
+            maxHeight: max(constraints.maxHeight, 700),
+            minWidth: constraints.minWidth,
+            maxWidth: constraints.maxWidth);
+      }
+
       if (constraints.maxWidth != 0) {
-        final Orientation orientation = constraints.maxWidth > constraints.maxHeight
+        final Orientation orientation =
+            constraints.maxWidth > constraints.maxHeight
                 ? Orientation.landscape
                 : Orientation.portrait;
         ScreenUtil.init(