add checkExist() for Flutter

Android/MMKV/gradle.properties

@@ -14,7 +14,7 @@ org.gradle.jvmargs=-Xmx1536m
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME_PREFIX=2.1.0
+VERSION_NAME_PREFIX=2.2.0
 #VERSION_NAME_SUFFIX=-SNAPSHOT
 VERSION_NAME_SUFFIX=
 

Android/MMKV/mmkv/build.gradle

@@ -128,14 +128,14 @@ afterEvaluate {
                 }
                 into "$buildDir/intermediates/prefab_package/${variant.name.capitalize()}/prefab/modules/mmkv/libs"
                 eachFile {
-                    println('hhh before:' + path)
+//                    println('hhh before:' + path)
                     for (abi in abiFilters) {
                         if (path.contains("${abi}/")) {
                             path = path.replace("${abi}/", "android.${abi}/")
                             break
                         }
                     }
-                    println('hhh after:' + path)
+//                    println('hhh after:' + path)
                 }
 
                 // Hook into build process

Android/MMKV/mmkvdemo/build.gradle

@@ -98,7 +98,7 @@ repositories {
 }
 
 // Define the mmkv version to use
-def mmkvVersion = '2.1.0'
+def mmkvVersion = '2.2.0'
 
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')

Core/MMKVPredef.h

@@ -34,7 +34,7 @@
 #include <vector>
 #include <unordered_map>
 
-constexpr auto MMKV_VERSION = "v2.1.0";
+constexpr auto MMKV_VERSION = "v2.2.0";
 
 #ifdef DEBUG
 #    define MMKV_DEBUG

Core/MMKV_IO.cpp

@@ -1496,7 +1496,7 @@ static std::pair<MMKVPath_t, MMKVPath_t> getStorage(const std::string &mmapID, c
     auto migrateStatus = tryMigrateLegacyMMKVFile(mmapID, relatePath);
     if (migrateStatus == MigrateStatus::NoneExist) {
         MMKVWarning("file id [%s] not exist in path %s", mmapID.c_str(), relatePath ? relatePath->c_str() : "default");
-        return false;
+        return {};
     } else if (migrateStatus == MigrateStatus::OldToNewMigrateFail) {
         realID = legacyMmapedKVKey(mmapID, relatePath);
     } else {

MMKV.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKV"
-  s.version      = "2.1.0"
+  s.version      = "2.2.0"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
 
   s.description  = <<-DESC
@@ -33,7 +33,7 @@ Pod::Spec.new do |s|
     "CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF" => "NO",
   }
 
-  s.dependency 'MMKVCore', '~> 2.1.0'
+  s.dependency 'MMKVCore', '~> 2.2.0'
 
 end
 

MMKVAppExtension.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVAppExtension"
-  s.version      = "2.1.0"
+  s.version      = "2.2.0"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
   s.module_name  = "MMKVAppExtension"
 
@@ -31,7 +31,7 @@ Pod::Spec.new do |s|
     "GCC_PREPROCESSOR_DEFINITIONS" => "MMKV_IOS_EXTENSION",
   }
 
-  s.dependency 'MMKVCore', '~> 2.1.0'
+  s.dependency 'MMKVCore', '~> 2.2.0'
 
 end
 

MMKVCore.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVCore"
-  s.version      = "2.1.1"
+  s.version      = "2.2.0"
   s.summary      = "MMKVCore for MMKV. MMKV is a cross-platform key-value storage framework developed by WeChat."
 
   s.description  = <<-DESC

MMKVWatchExtension.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "MMKVWatchExtension"
-  s.version      = "2.1.0"
+  s.version      = "2.2.0"
   s.summary      = "MMKV is a cross-platform key-value storage framework developed by WeChat."
   s.module_name  = "MMKVWatchExtension"
 
@@ -31,7 +31,7 @@ Pod::Spec.new do |s|
     "GCC_PREPROCESSOR_DEFINITIONS" => "MMKV_IOS_EXTENSION",
   }
 
-  s.dependency 'MMKVCore', '~> 2.1.0'
+  s.dependency 'MMKVCore', '~> 2.2.0'
 
 end
 

flutter/mmkv/CHANGELOG.md

@@ -1,5 +1,10 @@
 # MMKV for Flutter Change Log
-## v2.1.0 / 2025-03-06
+## v2.2.0 / 2025-04-xx
+* Add `checkExist()`.
+* Reduce file descriptor usage by a half and more.
+* Improve multi-process access efficiency by about 20%.
+
+## v2.1.1 / 2025-03-06
 This is a **critical hotfix** for v2.1.0. It's highly recommended to upgrade as soon as possible.
 * Fix a bug that MMKV instance from non-namespace fails to create.
 

flutter/mmkv/example/android/app/build.gradle

@@ -24,7 +24,7 @@ if (flutterVersionName == null) {
 
 android {
     namespace "com.tencent.mmkv_example"
-    compileSdkVersion 34
+    compileSdkVersion 35
 
     lintOptions {
         disable 'InvalidPackage'
@@ -33,7 +33,7 @@ android {
     defaultConfig {
         applicationId "com.tencent.mmkv_example"
         minSdkVersion 23
-        targetSdkVersion 34
+        targetSdkVersion 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
@@ -52,7 +52,7 @@ android {
     }
 
     dependencies {
-        implementation('com.tencent:mmkv:2.1.0')
+        implementation('com.tencent:mmkv:2.2.0')
 
         constraints {
             implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.0") {

flutter/mmkv/example/ios/Podfile

@@ -38,8 +38,8 @@ target 'Runner' do
   # https://blog.cocoapods.org/CocoaPods-1.4.0/
 #   script_phase :name => 'Fix MMKV Plugin Name', :script => 'sed -i "" "s/@import mmkv;/@import mmkvflutter;/g" ${SRCROOT}/Runner/GeneratedPluginRegistrant.m', :execution_position=>:before_compile
   # Specify the dependency from a specific branch
-#   pod 'MMKVCore', :git => 'https://github.com/Tencent/MMKV.git', :branch => 'dev_namespace'
-#   pod 'MMKV', :git => 'https://github.com/Tencent/MMKV.git', :branch => 'dev_namespace'
+   pod 'MMKVCore', :git => 'https://github.com/Tencent/MMKV.git', :branch => 'dev'
+   pod 'MMKV', :git => 'https://github.com/Tencent/MMKV.git', :branch => 'dev'
 end
 
 post_install do |installer|

flutter/mmkv/example/lib/main.dart

@@ -26,13 +26,13 @@ import "dart:typed_data";
 import "package:flutter/material.dart";
 import "package:mmkv/mmkv.dart";
 import "package:path_provider_foundation/path_provider_foundation.dart";
-import 'package:path_provider/path_provider.dart';
+import "package:path_provider/path_provider.dart";
 // import "package:posix/posix.dart" show chmod;
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  var groupDir = null;
+  var groupDir;
   if (Platform.isIOS) {
     final PathProviderFoundation provider = PathProviderFoundation();
     groupDir = await provider.getContainerPath(appGroupIdentifier: "group.tencent.mmkv");
@@ -188,33 +188,33 @@ class _MyAppState extends State<MyApp> {
                 functionalTest();
                 // testReadOnly();
               },
-              child: Text("Functional Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Functional Test", style: TextStyle(fontSize: 18))),
           TextButton(
               onPressed: () {
                 testReKey();
               },
-              child: Text("Encryption Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Encryption Test", style: TextStyle(fontSize: 18))),
           TextButton(
               onPressed: () {
                 testAutoExpire();
               },
-              child: Text("Auto Expiration Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Auto Expiration Test", style: TextStyle(fontSize: 18))),
           TextButton(
               onPressed: () {
                 testCompareBeforeSet();
               },
-              child: Text("Compare Before Insert/Update Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Compare Before Insert/Update Test", style: TextStyle(fontSize: 18))),
           TextButton(
               onPressed: () {
                 testBackup();
                 testRestore();
               },
-              child: Text("Backup & Restore Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Backup & Restore Test", style: TextStyle(fontSize: 18))),
           TextButton(
               onPressed: () {
-                testRemoveStorage();
+                testRemoveStorageAndCheckExist();
               },
-              child: Text("Remove Storage Test", style: TextStyle(fontSize: 18))),
+              child: const Text("Remove Storage & Check Exist Test", style: TextStyle(fontSize: 18))),
         ])),
       ),
     );
@@ -260,11 +260,11 @@ class _MyAppState extends State<MyApp> {
     print('contains "string": ${mmkv.containsKey('string')}');
 
     str += " with bytes";
-    var bytes = MMBuffer.fromList(Utf8Encoder().convert(str))!;
+    var bytes = MMBuffer.fromList(const Utf8Encoder().convert(str))!;
     mmkv.encodeBytes("bytes", bytes);
     bytes.destroy();
     bytes = mmkv.decodeBytes("bytes")!;
-    print("bytes = ${Utf8Decoder().convert(bytes.asList()!)}");
+    print("bytes = ${const Utf8Decoder().convert(bytes.asList()!)}");
     bytes.destroy();
 
     // test empty bytes
@@ -312,7 +312,7 @@ class _MyAppState extends State<MyApp> {
   }
 
   void testReKey() {
-    final mmapID = "testAES_reKey1";
+    const mmapID = "testAES_reKey1";
     final MMKV kv = testMMKV(mmapID, null, false, null);
 
     kv.reKey("Key_seq_1");
@@ -330,26 +330,26 @@ class _MyAppState extends State<MyApp> {
 
   void testBackup() {
     final rootDir = FileSystemEntity.parentOf(MMKV.rootDir);
-    var backupRootDir = rootDir + "/mmkv_backup_3";
-    final String mmapID = "test/AES";
-    final String cryptKey = "Tencent MMKV";
-    final String otherDir = rootDir + "/mmkv_3";
+    var backupRootDir = "$rootDir/mmkv_backup_3";
+    const String mmapID = "test/AES";
+    const String cryptKey = "Tencent MMKV";
+    final String otherDir = "$rootDir/mmkv_3";
     testMMKV(mmapID, cryptKey, false, otherDir);
 
     final ret = MMKV.backupOneToDirectory(mmapID, backupRootDir, rootDir: otherDir);
     print("backup one [$mmapID] return: $ret");
 
-    backupRootDir = rootDir + "/mmkv_backup";
+    backupRootDir = "$rootDir/mmkv_backup";
     final count = MMKV.backupAllToDirectory(backupRootDir);
     print("backup all count: $count");
   }
 
   void testRestore() {
     final rootDir = FileSystemEntity.parentOf(MMKV.rootDir);
-    var backupRootDir = rootDir + "/mmkv_backup_3";
-    final String mmapID = "test/AES";
-    final String cryptKey = "Tencent MMKV";
-    final String otherDir = rootDir + "/mmkv_3";
+    var backupRootDir = "$rootDir/mmkv_backup_3";
+    const String mmapID = "test/AES";
+    const String cryptKey = "Tencent MMKV";
+    final String otherDir = "$rootDir/mmkv_3";
 
     final kv = MMKV(mmapID, cryptKey: cryptKey, rootDir: otherDir);
     kv.encodeString("test_restore", "value before restore");
@@ -360,7 +360,7 @@ class _MyAppState extends State<MyApp> {
       print("after restore [${kv.mmapID}] allKeys: ${kv.allKeys}");
     }
 
-    backupRootDir = rootDir + "/mmkv_backup";
+    backupRootDir = "$rootDir/mmkv_backup";
     final count = MMKV.restoreAllFromDirectory(backupRootDir);
     print("restore all count $count");
     if (count > 0) {
@@ -390,7 +390,7 @@ class _MyAppState extends State<MyApp> {
     }
     mmkv.encodeBool("never_expire_key_1", true, MMKV.ExpireNever);
 
-    final duration = const Duration(seconds: 2);
+    const duration = Duration(seconds: 2);
     sleep(duration);
 
     print("auto_expire_key_1: ${mmkv.containsKey("auto_expire_key_1")}");
@@ -412,8 +412,8 @@ class _MyAppState extends State<MyApp> {
     mmkv.encodeString("key", "extra");
 
     {
-      final String key = "int";
-      final int v = 12345;
+      const String key = "int";
+      const int v = 12345;
       mmkv.encodeInt32(key, v);
       final actualSize = mmkv.actualSize;
       print("testCompareBeforeSet actualSize = $actualSize");
@@ -431,8 +431,8 @@ class _MyAppState extends State<MyApp> {
     }
 
     {
-      final key = "string";
-      final v = "w012A🏊🏻good";
+      const key = "string";
+      const v = "w012A🏊🏻good";
       mmkv.encodeString(key, v);
       final actualSize = mmkv.actualSize;
       print("testCompareBeforeSet actualSize = $actualSize");
@@ -450,13 +450,15 @@ class _MyAppState extends State<MyApp> {
     }
   }
 
-  void testRemoveStorage() {
+  void testRemoveStorageAndCheckExist() {
     var mmapID = "test_remove";
     {
       final mmkv = MMKV(mmapID, mode: MMKVMode.MULTI_PROCESS_MODE);
       mmkv.encodeBool("bool", true);
     }
+    print("check exist = ${MMKV.checkExist(mmapID)}");
     MMKV.removeStorage(mmapID);
+    print("after remove, check exist = ${MMKV.checkExist(mmapID)}");
     {
       final mmkv = MMKV(mmapID, mode: MMKVMode.MULTI_PROCESS_MODE);
       if (mmkv.count != 0) {
@@ -465,10 +467,12 @@ class _MyAppState extends State<MyApp> {
     }
 
     mmapID = "test_remove/sg";
-    final rootDir = MMKV.rootDir + "_sg";
+    final rootDir = "${MMKV.rootDir}_sg";
     var mmkv = MMKV(mmapID, rootDir: rootDir);
     mmkv.encodeBool("bool", true);
+    print("check exist = ${MMKV.checkExist(mmapID, rootDir: rootDir)}");
     MMKV.removeStorage(mmapID, rootDir: rootDir);
+    print("after remove, check exist = ${MMKV.checkExist(mmapID, rootDir: rootDir)}");
     mmkv = MMKV(mmapID, rootDir: rootDir);
     if (mmkv.count != 0) {
       print("storage not successfully removed");
@@ -476,8 +480,8 @@ class _MyAppState extends State<MyApp> {
   }
 
   void testReadOnly() {
-    final name = "testReadOnly";
-    final key = "ReadOnly+Key";
+    const name = "testReadOnly";
+    const key = "ReadOnly+Key";
     {
       final mmkv = MMKV(name, cryptKey: key);
       _testMMKVImp(mmkv, false);

flutter/mmkv/lib/mmkv.dart

@@ -757,6 +757,19 @@ class MMKV {
     return _int2Bool(ret);
   }
 
+  /// check the existence of the MMKV
+  static bool checkExist(String mmapID, {String? rootDir}) {
+    final mmapIDPtr = mmapID.toNativeUtf8();
+    final rootDirPtr = _string2Pointer(rootDir);
+
+    final ret = _checkExist(mmapIDPtr, rootDirPtr);
+
+    calloc.free(mmapIDPtr);
+    calloc.free(rootDirPtr);
+
+    return _int2Bool(ret);
+  }
+
   void checkContentChangedByOuterProcess() {
 
   }
@@ -958,3 +971,5 @@ final ContentCallbackRegister _registerContentHandler = _mmkvPlatform.registerCo
 final void Function(Pointer<Void>) _checkContentChanged = _mmkvPlatform.checkContentChangedFunc();
 
 final bool Function(Pointer<Utf8>) _getNameSpace = _mmkvPlatform.getNameSpaceFunc();
+
+final int Function(Pointer<Utf8> mmapID, Pointer<Utf8> rootPath) _checkExist = _mmkvPlatform.checkExistFunc();

flutter/mmkv/pubspec.yaml

@@ -1,6 +1,6 @@
 name: mmkv
 description: An efficient, small mobile key-value storage framework developed by WeChat. Works on Android & iOS.
-version: 2.1.1
+version: 2.2.0
 homepage: https://github.com/Tencent/mmkv
 repository: https://github.com/Tencent/MMKV/tree/master/flutter/mmkv
 
@@ -13,17 +13,17 @@ dependencies:
     sdk: flutter
   ffi: ^2.0.0
   mmkv_ios:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_ios
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_ios
   mmkv_android:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_android
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_android
   mmkv_ohos:
-    '>=2.1.0 <2.2.0'
-#      path: ../mmkv_ohos
+#    '>=2.2.0 <2.3.0'
+      path: ../mmkv_ohos
   mmkv_platform_interface:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_platform_interface
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_platform_interface
 
 dev_dependencies:
   test:

flutter/mmkv_android/CHANGELOG.md

@@ -1,4 +1,7 @@
 # MMKV Platform Android Change Log
+## v2.2.0 / 2025-4-xx
+Keep up with native lib v2.2.0.
+
 ## v2.1.0 / 2025-02-18
 Keep up with native lib v2.1.0.
 

flutter/mmkv_android/android/build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:8.8.0'
+        classpath 'com.android.tools.build:gradle:8.9.2'
     }
 }
 
@@ -16,7 +16,7 @@ rootProject.allprojects {
     repositories {
         google()
         mavenCentral()
-//        mavenLocal()
+        mavenLocal()
     }
 }
 
@@ -24,7 +24,7 @@ apply plugin: 'com.android.library'
 
 android {
     namespace "com.tencent.mmkvflutter"
-    compileSdkVersion 34
+    compileSdkVersion 35
 
     defaultConfig {
         minSdkVersion 23
@@ -34,6 +34,6 @@ android {
     }
 
     dependencies {
-        implementation 'com.tencent:mmkv:[2.1.0, 2.2)'
+        implementation 'com.tencent:mmkv:[2.2.0, 2.3)'
     }
 }

flutter/mmkv_android/pubspec.yaml

@@ -1,7 +1,7 @@
 name: mmkv_android
 description: Android platform implementation of MMKV.
 repository: https://github.com/Tencent/MMKV/tree/master/flutter/mmkv_ios
-version: 2.1.0
+version: 2.2.0
 homepage: https://github.com/Tencent/mmkv
 
 environment:
@@ -13,8 +13,8 @@ dependencies:
     sdk: flutter
   ffi: ^2.0.0
   mmkv_platform_interface:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_platform_interface
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_platform_interface
 
 dev_dependencies:
   test:

flutter/mmkv_ios/CHANGELOG.md

@@ -1,4 +1,7 @@
 # MMKV Platform iOS Change Log
+## v2.2.0 / 2025-4-xx
+Keep up with native lib v2.2.0.
+
 ## v2.1.0 / 2025-02-18
 Keep up with native lib v2.1.0.
 

flutter/mmkv_ios/ios/Classes/flutter-bridge.mm

@@ -652,3 +652,15 @@ MMKV_EXPORT bool MMKV_FUNC(getNameSpace)(const char *rootPath) {
     }
     return false;
 }
+
+MMKV_EXPORT bool MMKV_FUNC(checkExist)(const char *mmapID, const char *rootDir) {
+    auto strID = [NSString stringWithUTF8String:mmapID];
+
+    if (rootDir) {
+        auto root = [NSString stringWithUTF8String:rootDir];
+        if (root.length > 0) {
+            return [MMKV checkExist:strID rootPath:root];
+        }
+    }
+    return [MMKV checkExist:strID rootPath:nil];
+}

flutter/mmkv_ios/ios/mmkv_ios.podspec

@@ -5,7 +5,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'mmkv_ios'
-  s.version          = '2.1.0'
+  s.version          = '2.2.0'
   s.summary          = 'MMKV is a cross-platform key-value storage framework developed by WeChat.'
   s.description      = <<-DESC
   The MMKV, for Flutter.
@@ -19,7 +19,7 @@ Pod::Spec.new do |s|
   s.source_files = 'Classes/**/*'
   s.public_header_files = 'Classes/**/MMKVPlugin.h'
   s.dependency 'Flutter'
-  s.dependency 'MMKV', '>= 2.1.0', '< 2.2'
+  s.dependency 'MMKV', '>= 2.2.0', '< 2.3'
   s.platform = :ios, '13.0'
 
 # Flutter.framework does not contain a i386 slice.
@@ -30,4 +30,3 @@ Pod::Spec.new do |s|
   }
 
 end
-

flutter/mmkv_ios/pubspec.yaml

@@ -1,7 +1,7 @@
 name: mmkv_ios
 description: iOS platform implementation of MMKV.
 repository: https://github.com/Tencent/MMKV/tree/master/flutter/mmkv_ios
-version: 2.1.0
+version: 2.2.0
 homepage: https://github.com/Tencent/mmkv
 
 environment:
@@ -13,8 +13,8 @@ dependencies:
     sdk: flutter
   ffi: ^2.0.0
   mmkv_platform_interface:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_platform_interface
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_platform_interface
 
 dev_dependencies:
   test:

flutter/mmkv_ohos/CHANGELOG.md

@@ -1,4 +1,7 @@
 # MMKV Platform OHOS Change Log
+## v2.2.0 / 2025-4-xx
+Keep up with native lib v2.2.0.
+
 ## v2.1.0 / 2025-02-18
 Keep up with native lib v2.1.0.
 

flutter/mmkv_ohos/ohos/oh-package.json5

@@ -1,13 +1,13 @@
 {
   "name": "mmkv_ohos",
-  "version": "1.0.0",
+  "version": "2.2.0",
   "description": "Please describe the basic information.",
   "main": "index.ets",
   "author": "",
   "license": "Apache-2.0",
   "dependencies": {
     "@ohos/flutter_ohos": "file:./har/flutter.har",
-    "@tencent/mmkv": ">=2.1.0 <2.2"
+    "@tencent/mmkv": ">=2.2.0 <2.3"
 //    "@tencent/mmkv": "file:/Users/lingol/Developer/mmkv/OpenHarmony/MMKV/build/default/outputs/default/MMKV.har"
   },
   "devDependencies": {},

flutter/mmkv_ohos/pubspec.yaml

@@ -1,7 +1,7 @@
 name: mmkv_ohos
 description: OHOS platform implementation of MMKV.
 repository: https://github.com/Tencent/MMKV/tree/master/flutter/mmkv_ohos
-version: 2.1.0
+version: 2.2.0
 homepage: https://github.com/Tencent/mmkv
 
 environment:
@@ -18,8 +18,8 @@ dependencies:
 #      path: "packages/path_provider/path_provider_ohos"
   ffi: ^2.0.0
   mmkv_platform_interface:
-    '>=2.1.0 <2.2.0'
-#    path: ../mmkv_platform_interface
+#    '>=2.2.0 <2.3.0'
+    path: ../mmkv_platform_interface
 
 dev_dependencies:
   flutter_test:

flutter/mmkv_platform_interface/CHANGELOG.md

@@ -1,4 +1,7 @@
 # MMKV Platform Interface Change Log
+## v2.2.0 / 2025-4-xx
+* Add `checkExist()`.
+
 ## v2.1.0 / 2025-02-18
 * Bump to 2.1 to setup a breaking change version.
 * Add `getNameSpace()`.

flutter/mmkv_platform_interface/lib/mmkv_platform_ffi.dart

@@ -331,4 +331,9 @@ class MMKVPluginPlatformFFI extends MMKVPluginPlatform {
   bool Function(Pointer<Utf8> rootPath) getNameSpaceFunc() {
     return nativeLib().lookup<NativeFunction<Bool Function(Pointer<Utf8>)>>(nativeFuncName("getNameSpace")).asFunction();
   }
+
+  @override
+  int Function(Pointer<Utf8> mmapID, Pointer<Utf8> rootPath) checkExistFunc() {
+    return nativeLib().lookup<NativeFunction<Int8 Function(Pointer<Utf8>, Pointer<Utf8>)>>(nativeFuncName("checkExist")).asFunction();
+  }
 }

flutter/mmkv_platform_interface/lib/mmkv_platform_interface.dart

@@ -328,6 +328,10 @@ class MMKVPluginPlatform {
     final result = await getTemporaryDirectory();
     return result.path;
   }
+
+  int Function(Pointer<Utf8> mmapID, Pointer<Utf8> rootPath) checkExistFunc() {
+    throw UnimplementedError();
+  }
 }
 
 typedef LogCallbackWrap = Void Function(Uint32, Pointer<Utf8>, Int32, Pointer<Utf8>, Pointer<Utf8>);

flutter/mmkv_platform_interface/pubspec.yaml

@@ -3,7 +3,7 @@ description: A common platform interface for the MMKV plugin.
 repository: https://github.com/Tencent/MMKV/tree/master/flutter/mmkv_platform_interface
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.1.0
+version: 2.2.0
 homepage: https://github.com/Tencent/MMKV
 
 environment: