fix

Samples/UIWidgetsSamples_2019_4/Assets/UIWidgetsGallery/GalleryMain.cs

 
         protected override void onEnable()
         {
-            AndroidPlatformUtil.SetStatusBarValue(true);
+            AndroidPlatformUtil.ShowStatusBar(true);
             AddFont("Material Icons", new List<string> {"MaterialIcons-Regular.ttf"}, new List<int> {0});
             AddFont("CupertinoIcons", new List<string> {"CupertinoIcons.ttf"}, new List<int> {0});
             AddFont("GalleryIcons", new List<string> {"gallery/GalleryIcons.ttf"}, new List<int> {0});

com.unity.uiwidgets/Runtime/Plugins/Android/InputConnectionAdaptor.java

-// Copyright 2013 The Flutter Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
 package com.unity.uiwidgets.plugin.editing;
 
 import android.content.Context;

com.unity.uiwidgets/Runtime/engine2/AndroidPlatformUtil.cs

-#if UNITY_ANDROID
+#if !UNITY_EDITOR && UNITY_ANDROID
 using UnityEngine;
 using AOT;
 using System.IO;
             GL.IssuePluginEvent(GetUnityContextEventFunc(), 1);
         }
 
-        public static void SetStatusBarValue(bool value) {
+        public static void ShowStatusBar(bool value) {
 #if !UNITY_EDITOR
             using (var util = new AndroidJavaClass("com.unity.uiwidgets.plugin.Utils")) {
                 util.CallStatic("SetStatusBarState", value);

com.unity.uiwidgets/Runtime/widgets/binding.cs

 
         public void attachRootWidget(Widget rootWidget) {
             _readyToProduceFrames = true;
-            window.updateSafeArea();
 
             _renderViewElement = new RenderObjectToWidgetAdapter<RenderBox>(
                 container: renderView,