gradle crash

android/app/build.gradle

@@ -50,6 +50,7 @@ android {
         targetSdkVersion 28
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
+        multiDexEnabled true
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
@@ -66,9 +67,21 @@ android {
             buildConfigField ("String[]", "SUPPORTED_DEVICES", collectSupportedDevicesToArray())
         }
         release {
+            minifyEnabled false
+            shrinkResources false
             signingConfig signingConfigs.release
         }
     }
+
+    compileOptions {
+        //coreLibraryDesugaringEnabled true
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = JavaVersion.VERSION_1_8.toString()
+    }
 }
 
 flutter {
@@ -76,6 +89,7 @@ flutter {
 }
 
 dependencies {
+    //coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.0.9'
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
@@ -132,3 +146,5 @@ def collectSupportedDevicesToArray() {
         "\"${it}\""
     }.join(",") + '}'
 }
+
+

android/app/src/main/java/kz/com/aman/kassa/plugins/BankNfcPlugins.java

@@ -73,6 +73,12 @@ public class BankNfcPlugins implements MethodCallHandler {
             case "shutdown":
                 shutdown(call, result);
                 break;
+            case "version":
+
+                result.success("version: "+Runtime.class.getPackage().getSpecificationVersion());
+                break;
+
+
             case "get":
                 final List<Object> json = new ArrayList<>();
                 for (int i = 0; i < 2; i++) {
@@ -86,6 +92,16 @@ public class BankNfcPlugins implements MethodCallHandler {
     }
 
 
+    private static int getVersion() {
+        String version = System.getProperty("java.version");
+        if(version.startsWith("1.")) {
+            version = version.substring(2, 3);
+        } else {
+            int dot = version.indexOf(".");
+            if(dot != -1) { version = version.substring(0, dot); }
+        } return Integer.parseInt(version);
+    }
+
 
     private void init(MethodCall call, Result result) {
         String serverUrl = call.argument("serverUrl");

android/build.gradle

@@ -130,6 +130,12 @@ allprojects {
         google()
         jcenter()
     }
+
+    configurations.all {
+        resolutionStrategy {
+            cacheDynamicVersionsFor 2, 'minutes'
+        }
+    }
 }
 
 rootProject.buildDir = '../build'
@@ -143,3 +149,10 @@ subprojects {
 task clean(type: Delete) {
     delete rootProject.buildDir
 }
+
+tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+

lib/views/bank_view/bank_view.dart

@@ -19,15 +19,16 @@ class _BankViewState extends State<BankView> {
   String payValue;
   String cancelValue;
   String shutdownValue;
+  String versionValue;
   bool loading = false;
 
   @override
   void initState() {
     super.initState();
-    load();
+    //load();
   }
 
-  load() async {
+  initialize() async {
     String result = await _channel.invokeMethod('init', <String, dynamic>{
       'serverUrl': 'http://185.98.84.231:2000',
     });
@@ -36,6 +37,13 @@ class _BankViewState extends State<BankView> {
     });
   }
 
+  version() async {
+    String result = await _channel.invokeMethod('version');
+    setState(() {
+      versionValue = result ?? 'none';
+    });
+  }
+
   connect() async {
     String result = await _channel.invokeMethod("connection");
     setState(() {
@@ -111,7 +119,22 @@ class _BankViewState extends State<BankView> {
                   children: <Widget>[
                     RaisedButton(
                         child: Text('Activity m4Bank'), onPressed: activity),
-                    Text('init: $initValue'),
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceAround,
+                      children: <Widget>[
+                        Text('version: $versionValue'),
+                        RaisedButton(
+                            child: Text('Version'), onPressed: version),
+                      ],
+                    ),
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.spaceAround,
+                      children: <Widget>[
+                        Text('init: $initValue'),
+                        RaisedButton(
+                            child: Text('Init'), onPressed: initialize),
+                      ],
+                    ),
                     Row(
                       mainAxisAlignment: MainAxisAlignment.spaceAround,
                       children: <Widget>[