Make it it work for current android (api 32) and flutter 3.0.1

android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 29
+    compileSdkVersion flutter.compileSdkVersion
 
     lintOptions {
         disable 'InvalidPackage'
@@ -35,8 +35,8 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "co.appbrewery.flash_chat"
-        minSdkVersion 16
-        targetSdkVersion 29
+        minSdkVersion 19
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
         multiDexEnabled true

android/app/src/main/AndroidManifest.xml

@@ -7,7 +7,7 @@
          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="${applicationName}"
         android:label="flash_chat"
         android:icon="@mipmap/ic_launcher">
         <activity
@@ -17,17 +17,13 @@
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
-            <!-- This keeps the window background of the activity showing
-                 until Flutter renders its first frame. It can be removed if
-                 there is no splash screen (such as the default splash screen
-                 defined in @style/LaunchTheme). -->
-            <meta-data
-                android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
-                android:value="true" />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <meta-data
+            android:name="flutterEmbedding"
+            android:value="2" />
     </application>
 </manifest>

android/app/src/main/java/co/appbrewery/flash_chat/MainActivity.java

@@ -1,13 +1,6 @@
 package co.appbrewery.flash_chat;
 
-import android.os.Bundle;
-import io.flutter.app.FlutterActivity;
-import io.flutter.plugins.GeneratedPluginRegistrant;
+import io.flutter.embedding.android.FlutterActivity;
 
 public class MainActivity extends FlutterActivity {
-  @Override
-  protected void onCreate(Bundle savedInstanceState) {
-    super.onCreate(savedInstanceState);
-    GeneratedPluginRegistrant.registerWith(this);
-  }
 }

android/build.gradle

@@ -1,11 +1,13 @@
 buildscript {
+    ext.kotlin_version = '1.6.21'
+
     repositories {
         google()
         jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.3'
+        classpath 'com.android.tools.build:gradle:4.1.0'
     }
 }
 

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-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

lib/main.dart

@@ -12,7 +12,7 @@ class FlashChat extends StatelessWidget {
     return MaterialApp(
       theme: ThemeData.dark().copyWith(
         textTheme: TextTheme(
-          body1: TextStyle(color: Colors.black54),
+          bodyText1: TextStyle(color: Colors.black54),
         ),
       ),
       home: WelcomeScreen(),

lib/screens/welcome_screen.dart

@@ -27,6 +27,7 @@ class _WelcomeScreenState extends State<WelcomeScreen> {
                   style: TextStyle(
                     fontSize: 45.0,
                     fontWeight: FontWeight.w900,
+                    color: Colors.black54,
                   ),
                 ),
               ],

pubspec.yaml

@@ -4,13 +4,13 @@ description: A new Flutter application.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.1.0<3.0.0"
+  sdk: ">=2.16.1<3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
 
-  cupertino_icons: ^0.1.2
+  cupertino_icons: ^1.0.3
 
 dev_dependencies:
   flutter_test: