Flutter Plugin Upgrade and Build Error solved

scp/.gitignore

@@ -10,6 +10,7 @@
 .history
 .svn/
 android/app/google-services.json
+android/android.zip
 android/google-services.json
 android/app/key.jks
 android/key.properties

scp/android/app/build.gradle

@@ -65,7 +65,6 @@ android {
         release {
             signingConfig signingConfigs.release
             minifyEnabled true
-            useProguard true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         debug{
@@ -92,10 +91,10 @@ dependencies {
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'com.facebook.shimmer:shimmer:0.1.0@aar'
     implementation 'androidx.appcompat:appcompat:1.1.0'
-    implementation 'com.android.support:multidex:1.0.3'
+    implementation 'androidx.multidex:multidex:2.0.0'
     implementation "com.airbnb.android:lottie:3.5.0"
-    implementation "com.android.support.constraint:constraint-layout:2.0.4"
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
 
 }
 apply plugin: 'com.google.gms.google-services'
-apply plugin: 'io.fabric'
+apply plugin: 'com.google.firebase.crashlytics'

scp/android/app/src/main/java/in/ac/nitrkl/scp/Application.java

@@ -5,7 +5,6 @@
 import androidx.annotation.NonNull;
 import io.flutter.plugin.common.PluginRegistry.PluginRegistrantCallback;
 import io.flutter.plugins.GeneratedPluginRegistrant;
-import io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService;
 import io.flutter.embedding.engine.FlutterEngine;
 import io.flutter.embedding.android.FlutterActivity;
 

scp/android/build.gradle

@@ -1,23 +1,20 @@
 buildscript {
-    ext.kotlin_version = '1.3.41'
+    ext.kotlin_version = '1.3.50'
     repositories {
         maven {
             url 'https://maven.google.com/'
         }
         google()
         jcenter()
         maven { url 'https://dl.bintray.com/android/android-tools' }
-        maven {
-            url 'https://maven.fabric.io/public'
-        }
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.0.1'
+        classpath 'com.android.tools.build:gradle:7.0.2'
         classpath 'com.google.gms:google-services:4.3.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'com.google.gms:google-services:4.2.0'
-        classpath 'io.fabric.tools:gradle:1.28.1'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.3.0'
     }
 }
 

scp/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-all.zip

scp/lib/chat.dart

@@ -1,22 +1,24 @@
 import 'package:flutter/material.dart';
-import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';
 import 'package:scp/utils/chatArgs.dart';
+import 'package:webview_flutter/webview_flutter.dart';
 
 class ChatView extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final ChatArguments args = ModalRoute.of(context).settings.arguments;
     return SafeArea(
-      child: WebviewScaffold(
-        url:args.url,
-        withZoom: true,
-        hidden: true,
-        withJavascript: true,
-        resizeToAvoidBottomInset: true,
-        initialChild: Center(
-          child: CircularProgressIndicator(),
-        ),
-      ),
-    );
+        child: Scaffold(
+      body: WebView(
+          initialUrl: args.url,
+          javascriptMode: JavascriptMode.unrestricted,
+          zoomEnabled: true,
+          onWebResourceError: (error) {
+            print(error.errorCode);
+            return CircularProgressIndicator();
+          },
+          onProgress: (int progress) {
+            print("WebView is loading (progress : $progress%)");
+          }),
+    ));
   }
 }

scp/lib/main.dart

@@ -1,4 +1,5 @@
 import 'package:firebase_auth/firebase_auth.dart';
+import 'package:firebase_core/firebase_core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:firebase_crashlytics/firebase_crashlytics.dart';
@@ -25,8 +26,9 @@ final playstoreURL =
   // Or do other work.
 } */
 
-void main() {
+void main() async {
   WidgetsFlutterBinding.ensureInitialized();
+  await Firebase.initializeApp();
   SystemChrome.setPreferredOrientations(
       [DeviceOrientation.portraitUp, DeviceOrientation.portraitDown]);
   FlutterError.onError = FirebaseCrashlytics.instance.recordFlutterError;

scp/lib/ui/views/mentor_search/mentor_page.dart

@@ -1,8 +1,8 @@
 import 'package:flutter/material.dart';
+import 'package:flutter_contacts/flutter_contacts.dart';
 import 'package:graphql_flutter/graphql_flutter.dart';
 
 import 'package:url_launcher/url_launcher.dart';
-import 'package:native_contact_dialog/native_contact_dialog.dart';
 import 'package:scp/utils/grapgQLconfig.dart';
 
 final Color primaryColor = Color.fromARGB(255, 49, 68, 76);
@@ -301,9 +301,10 @@ class MentorDetails extends StatelessWidget {
                           ),
                           onPressed: () {
                             saveContact(Contact(
-                                givenName: mentorName,
-                                phones: [Item(value: mentorContact)],
-                                emails: [Item(value: mentorEmail)]));
+                              displayName: mentorName,
+                              phones: [Phone(mentorContact)],
+                              emails: [Email(mentorEmail)],
+                            ));
                           },
                           child: Text(
                             message,
@@ -343,17 +344,12 @@ class MentorDetails extends StatelessWidget {
         });
   }
 
-  void saveContact(Contact newContact) async {
-    NativeContactDialog.addContact(newContact).then((result) {
-      // NOTE: The user could cancel the dialog, but not add
-      // them to their addressbook. Whether or not the user decides
-      // to add [contactToAdd] to their addressbook, you will end up
-      // here.
-
-      print('add contact dialog closed.');
+  void saveContact(Contact contact) async {
+    // save contact
+    final result = FlutterContacts.insertContact(contact).then((value) {
+      print('add contact dialog closed');
     }).catchError((error) {
-      // FlutterError, most likely unsupported operating system.
-      print('Error adding contact!');
+      print('pata nai bhai kya error hai');
     });
   }
 }

scp/pubspec.yaml

@@ -24,17 +24,16 @@ dependencies:
   firebase_database: ^7.2.2
   firebase_messaging: ^10.0.7
   firebase_remote_config: ^0.11.0
-  firebase_storage: ^10.0.3
-  flutter_webview_plugin: ^0.4.0
+  firebase_storage: ^10.0.3  
+  flutter_contacts: ^1.1.1+2
   font_awesome_flutter: ^9.1.0
   get_it: ^5.0.3
   graphql_flutter: ^5.0.0
   http: ^0.13.3
   in_app_review: ^2.0.3
   intl: ^0.17.0
   lite_rolling_switch: ^0.1.1
-  lottie: ^1.1.0
-  native_contact_dialog: ^0.2.2
+  lottie: ^1.1.0  
   ndialog: ^4.1.0
   package_info: ^2.0.2
   path_provider: ^2.0.3
@@ -44,6 +43,7 @@ dependencies:
   stacked: ^1.7.6
   table_calendar: ^2.2.3
   url_launcher: ^6.0.10
+  webview_flutter: ^2.3.0
   firebase_analytics: ^8.3.2
 
 dev_dependencies: