Fix file upload/download

android/app/build.gradle

@@ -40,6 +40,10 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
+    dependencies {
+        implementation 'com.google.android.material:material:1.4.0'
+    }
+
     kotlinOptions {
         jvmTarget = '1.8'
     }

android/app/src/main/res/values-night/styles.xml

@@ -12,7 +12,7 @@
          running.
          
          This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+    <style name="NormalTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
 </resources>

android/app/src/main/res/values/styles.xml

@@ -12,7 +12,7 @@
          running.
          
          This Theme is only used starting with V2 of Flutter's Android embedding. -->
-    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+    <style name="NormalTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
         <item name="android:windowBackground">?android:colorBackground</item>
     </style>
 </resources>

lib/main.dart

@@ -1,5 +1,5 @@
+import 'package:comptaplan_app/webview_widget.dart';
 import 'package:flutter/material.dart';
-import 'package:webview_flutter/webview_flutter.dart';
 
 void main() {
   const title = String.fromEnvironment("APP_TITLE");
@@ -18,14 +18,8 @@ class MyApp extends StatelessWidget {
   // This widget is the root of your application.
   @override
   Widget build(BuildContext context) {
-    MaterialColor materialColor = this._getMaterialColor(this._color);
+    MaterialColor materialColor = _getMaterialColor(this._color);
-    return MaterialApp(
+    return MaterialApp(title: _title, theme: ThemeData(primarySwatch: materialColor), home: WebViewWidget(_uri));
-        title: this._title,
-        theme: ThemeData(primarySwatch: materialColor),
-        home: WebView(
-          initialUrl: this._uri,
-          javascriptMode: JavascriptMode.unrestricted,
-        ));
   }
 
   MaterialColor _getMaterialColor(String colorString) {

lib/webview_widget.dart

@@ -0,0 +1,47 @@
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_webview_pro/webview_flutter.dart';
+
+class WebViewWidget extends StatefulWidget {
+  final String _initialUrl;
+
+  const WebViewWidget(this._initialUrl, {Key? key}) : super(key: key);
+
+  @override
+  WebViewWidgetState createState() => WebViewWidgetState();
+}
+
+class WebViewWidgetState extends State<WebViewWidget> {
+  WebViewWidgetState();
+
+  @override
+  void initState() {
+    super.initState();
+    // Enable hybrid composition.
+    if (Platform.isAndroid) WebView.platform = SurfaceAndroidWebView();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return WebView(
+      initialUrl: widget._initialUrl,
+      javascriptMode: JavascriptMode.unrestricted,
+      javascriptChannels: <JavascriptChannel>{
+        _toasterJavascriptChannel(context),
+      },
+      gestureNavigationEnabled: true,
+    );
+  }
+
+  JavascriptChannel _toasterJavascriptChannel(BuildContext context) {
+    return JavascriptChannel(
+        name: 'Toaster',
+        onMessageReceived: (JavascriptMessage message) {
+          // ignore: deprecated_member_use
+          Scaffold.of(context).showSnackBar(
+            SnackBar(content: Text(message.message)),
+          );
+        });
+  }
+}

pubspec.lock

@@ -74,6 +74,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_webview_pro:
+    dependency: "direct main"
+    description:
+      name: flutter_webview_pro
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   lints:
     dependency: transitive
     description:
@@ -102,13 +109,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
-  plugin_platform_interface:
-    dependency: transitive
-    description:
-      name: plugin_platform_interface
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -170,34 +170,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
-  webview_flutter:
-    dependency: "direct main"
-    description:
-      name: webview_flutter
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.3.1"
-  webview_flutter_android:
-    dependency: transitive
-    description:
-      name: webview_flutter_android
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.3.1"
-  webview_flutter_platform_interface:
-    dependency: transitive
-    description:
-      name: webview_flutter_platform_interface
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.1"
-  webview_flutter_wkwebview:
-    dependency: transitive
-    description:
-      name: webview_flutter_wkwebview
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.4.0"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.12.0 <3.0.0"
-  flutter: ">=2.5.0"
+  flutter: ">=1.22.0"

pubspec.yaml

@@ -34,7 +34,9 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
-  webview_flutter: ^2.0.13
+#  webview_flutter: ^2.0.13
+  # COmmunity plugin adding features unsupported in the official webview
+  flutter_webview_pro: ^1.0.0
 dev_dependencies:
   flutter_test:
     sdk: flutter