Revert "update gradle distribution url and remove validation length in action function"

This reverts commit a863bcb9.

example/android/app/build.gradle

@@ -26,7 +26,7 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 30
+    compileSdkVersion 28
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
@@ -39,8 +39,8 @@ android {
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
         applicationId "com.example.example"
-        minSdkVersion 21
-        targetSdkVersion 30
+        minSdkVersion 16
+        targetSdkVersion 28
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }

example/android/build.gradle

@@ -2,11 +2,11 @@ buildscript {
     ext.kotlin_version = '1.3.50'
     repositories {
         google()
-        mavenCentral()
+        jcenter()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.0'
+        classpath 'com.android.tools.build:gradle:3.5.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -14,7 +14,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        mavenCentral()
+        jcenter()
     }
 }
 

example/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-6.7-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip

example/pubspec.lock

@@ -7,7 +7,7 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.8.1"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -28,7 +28,7 @@ packages:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.1"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
@@ -80,7 +80,7 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.3.0"
   multi_select_flutter:
     dependency: "direct main"
     description:
@@ -106,7 +106,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.0"
   stack_trace:
     dependency: transitive
     description:
@@ -141,7 +141,7 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.2"
+    version: "0.2.19"
   typed_data:
     dependency: transitive
     description:
@@ -157,4 +157,4 @@ packages:
     source: hosted
     version: "2.1.0"
 sdks:
-  dart: ">=2.12.0 <3.0.0"
+  dart: ">=2.12.0-0.0 <3.0.0"

lib/util/multi_select_actions.dart

@@ -22,7 +22,9 @@ class MultiSelectActions<V> {
   /// Calls the onConfirm function if one was provided.
   void onConfirmTap(
       BuildContext ctx, List<V> selectedValues, Function(List<V>)? onConfirm, int validationSelectedLength) {
+    if (selectedValues.length <= validationSelectedLength) {
       Navigator.pop(ctx, selectedValues); 
+    }
     if (onConfirm != null) {
       onConfirm(selectedValues);
     }

pubspec.lock

@@ -8,7 +8,11 @@ packages:
       sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
       url: "https://pub.dev"
     source: hosted
+<<<<<<< HEAD
     version: "2.11.0"
+=======
+    version: "2.5.0"
+>>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   boolean_selector:
     dependency: transitive
     description:
@@ -24,7 +28,18 @@ packages:
       sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
       url: "https://pub.dev"
     source: hosted
+<<<<<<< HEAD
     version: "1.3.0"
+=======
+    version: "1.1.0"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+>>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   clock:
     dependency: transitive
     description:
@@ -82,7 +97,11 @@ packages:
       sha256: a6e590c838b18133bb482a2745ad77c5bb7715fb0451209e1a7567d416678b8e
       url: "https://pub.dev"
     source: hosted
+<<<<<<< HEAD
     version: "1.10.0"
+=======
+    version: "1.3.0"
+>>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   path:
     dependency: transitive
     description:
@@ -103,7 +122,11 @@ packages:
       sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
       url: "https://pub.dev"
     source: hosted
+<<<<<<< HEAD
     version: "1.10.0"
+=======
+    version: "1.8.0"
+>>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   stack_trace:
     dependency: transitive
     description:
@@ -143,7 +166,18 @@ packages:
       sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
       url: "https://pub.dev"
     source: hosted
+<<<<<<< HEAD
     version: "0.6.1"
+=======
+    version: "0.2.19"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+>>>>>>> parent of a863bcb (update gradle distribution url and remove validation length in action function)
   vector_math:
     dependency: transitive
     description: