Upgraded gradle version and configuration files

android/app/build.gradle

@@ -1,3 +1,9 @@
+plugins {
+    id "com.android.application"
+    id "kotlin-android"
+    id "dev.flutter.flutter-gradle-plugin"
+}
+
 def localProperties = new Properties()
 def localPropertiesFile = rootProject.file('local.properties')
 if (localPropertiesFile.exists()) {
@@ -6,11 +12,6 @@ if (localPropertiesFile.exists()) {
     }
 }
 
-def flutterRoot = localProperties.getProperty('flutter.sdk')
-if (flutterRoot == null) {
-    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
-}
-
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
 if (flutterVersionCode == null) {
     flutterVersionCode = '1'
@@ -21,13 +22,9 @@ if (flutterVersionName == null) {
     flutterVersionName = '1.0'
 }
 
-apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
-apply plugin: 'com.google.gms.google-services'
-apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
-
 android {
-    compileSdkVersion flutter.compileSdkVersion
+    namespace "eu.mhsl.marianum.mobile.client"
+    compileSdk flutter.compileSdkVersion
     ndkVersion flutter.ndkVersion
 
     compileOptions {
@@ -35,16 +32,23 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    sourceSets {
+        main.java.srcDirs += 'src/main/kotlin'
+    }
+
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "eu.mhsl.marianum.mobile.client"
         // You can update the following values to match your application needs.
-        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-build-configuration.
+        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
         minSdkVersion 19
         targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        multiDexEnabled true
     }
 
     buildTypes {
@@ -59,3 +63,5 @@ android {
 flutter {
     source '../..'
 }
+
+dependencies {}

android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="eu.mhsl.marianum.mobile.client">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="eu.mhsl.marianum.mobile.client">
-   <application
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
         android:label="Marianum Fulda"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
@@ -31,5 +30,16 @@
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
+    <!-- Required to query activities that can process text, see:
+         https://developer.android.com/training/package-visibility?hl=en and
+         https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
+
+         In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
+    <queries>
+        <intent>
+            <action android:name="android.intent.action.PROCESS_TEXT"/>
+            <data android:mimeType="text/plain"/>
+        </intent>
+    </queries>
     <uses-permission android:name="android.permission.INTERNET"/>
 </manifest>

android/app/src/main/java/eu/mhsl/marianum/mobile/client/MainActivity.java

@@ -1,6 +0,0 @@
-package eu.mhsl.marianum.mobile.client;
-
-import io.flutter.embedding.android.FlutterActivity;
-
-public class MainActivity extends FlutterActivity {
-}

android/app/src/main/kotlin/com/example/client/MainActivity.kt

@@ -0,0 +1,5 @@
+package com.example.client
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity()

android/app/src/main/kotlin/eu/mhsl/marianum/mobile/client/MainActivity.kt

@@ -0,0 +1,5 @@
+package eu.mhsl.marianum.mobile.client
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity()

android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,4 @@
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="eu.mhsl.marianum.mobile.client">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <!-- The INTERNET permission is required for development. Specifically,
          the Flutter tool needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.