Successfully migrated to V2

android/app/build.gradle

@@ -26,7 +26,12 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 33
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -39,7 +44,7 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.nankai.flutter_nearby_connections_example"
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 30
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
@@ -63,5 +68,10 @@ dependencies {
 
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'com.android.support:multidex:1.0.3'
+    implementation 'androidx.core:core-ktx:1.6.0'
+    implementation 'androidx.appcompat:appcompat:1.3.1'
+    implementation 'com.google.android.gms:play-services-nearby:18.0.0'
+    implementation 'io.flutter:flutter_embedding_debug:1.0.0-rc.8'
+    implementation 'com.google.android.material:material:1.2.1'
 
 }

android/app/src/main/AndroidManifest.xml

@@ -6,7 +6,7 @@
          additional functionality it is fine to subclass or reimplement
          FlutterApplication and put your custom class here. -->
     <application
-        android:name="io.flutter.app.FlutterApplication"
+        android:name="io.flutter.embedding.android.FlutterApplication"
         android:label="flutter_nearby_connections_example"
         android:icon="@mipmap/ic_launcher">
         <activity

android/app/src/main/kotlin/com/aossie/p2p/MainActivity.kt

@@ -3,4 +3,4 @@ package com.aossie.p2p
 import io.flutter.embedding.android.FlutterActivity
 
 class MainActivity: FlutterActivity() {
-}
+}

android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.5.10'
+    ext.kotlin_version = '1.8.0'
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.3'
+        classpath 'com.android.tools.build:gradle:7.1.2'
 //        classpath 'com.android.tools.build:gradle:3.3.3'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }

android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,5 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.2-all.zip
+

lib/encyption/rsa.dart

@@ -2,10 +2,10 @@ import 'package:rsa_encrypt/rsa_encrypt.dart';
 import 'package:pointycastle/api.dart' as crypto;
 
 //Future to hold our KeyPair
-Future<crypto.AsymmetricKeyPair> futureKeyPair;
+late Future<crypto.AsymmetricKeyPair> futureKeyPair;
 
 //to store the KeyPair once we get data from our future
-crypto.AsymmetricKeyPair keyPair;
+late crypto.AsymmetricKeyPair keyPair;
 
 Future<crypto.AsymmetricKeyPair<crypto.PublicKey, crypto.PrivateKey>> getKeyPair()
 {
@@ -16,6 +16,5 @@ Future<crypto.AsymmetricKeyPair<crypto.PublicKey, crypto.PrivateKey>> getKeyPair
 void createPair (){
   futureKeyPair=getKeyPair();
   futureKeyPair.then((value) => keyPair=value);
-  var x=encodePrivateKeyToPemPKCS1(keyPair.privateKey);
 
 }

lib/main.dart

@@ -1,6 +1,6 @@
 
 import 'package:flutter/material.dart';
-import 'package:p2p/pages/ChatListScreen.dart';
+import 'pages/ChatListScreen.dart';
 import 'pages/Profile.dart';
 void main() {
   runApp(MyApp());

lib/pages/ChatListScreen.dart

@@ -58,15 +58,15 @@ class _ChatListScreenState extends State<ChatListScreen> {
         items: [
           BottomNavigationBarItem(
             icon: Icon(Icons.message),
-            title: Text("Chats"),
+            label: "Chats",
           ),
           BottomNavigationBarItem(
             icon: Icon(Icons.group_work),
-            title: Text("Available"),
+            label: "Available",
           ),
           BottomNavigationBarItem(
             icon: Icon(Icons.account_box),
-            title: Text("Profile"),
+            label: "Profile",
           ),
         ],
       ),

lib/pages/DeviceListScreen.dart

@@ -91,15 +91,15 @@ class _DevicesListScreenState extends State<DevicesListScreen> {
         items: [
           BottomNavigationBarItem(
             icon: Icon(Icons.message),
-            title: Text("Chats"),
+            label: "Chats",
           ),
           BottomNavigationBarItem(
             icon: Icon(Icons.group_work),
-            title: Text("Available"),
+            label: "Available",
           ),
           BottomNavigationBarItem(
             icon: Icon(Icons.account_box),
-            title: Text("Profile"),
+            label: "Profile",
           ),
         ],
         currentIndex: _selectedIndex,

pubspec.yaml

@@ -21,7 +21,7 @@ dependencies:
   intl: ^0.17.0
   rsa_encrypt: ^2.0.0
   pointycastle: ^3.0.1
-
+  p2p_client_dart: ^1.0.4
 
 dev_dependencies:
   flutter_test: