MissingPluginException（未在通道 plugins.flutter.io/shared_preferences 上找到方法 getAll 的实现） - 现有解决方案无效 -

Question

我正在构建一个使用这些包的应用程序

firebase_core: ^0.5.0
firebase_analytics:^5.0.16
cloud_firestore:
firebase_messaging: ^7.0.0
flutter_local_notifications: ^1.4.4+2
提供商：^4.3.1
http:^0.12.2
reviews_slider: ^1.0.5
flutter_screenutil: ^2.3.0
shared_preferences: ^0.5.12
scroll_to_index: ^1.0.6
firebase_database: ^4.0.0
image_picker: ^0.6.7+11
得到：^3.11.1

在调试模式下一切正常，但是当我构建一个版本时，我得到了那个错误我已经搜索了 3 天，我发现你需要的所有东西

flutter clean
pub get/ pub upgrade

然后它就很有魅力了。但它对我不起作用

这里是 app/build.gradle 文件

def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
    localPropertiesFile.withReader('UTF-8') { reader ->
        localProperties.load(reader)
    }
}

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'
}

def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
    flutterVersionName = '1.0'
}

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"

def keystoreProperties = new Properties()
def keystorePropertiesFile = rootProject.file('key.properties')
if (keystorePropertiesFile.exists()) {
    keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
}

android {
    compileSdkVersion 28

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }

    lintOptions {
        disable 'InvalidPackage'
        checkReleaseBuilds false
    }

    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.zonedelivery.zonedelivery"
        minSdkVersion 16
        targetSdkVersion 28
        multiDexEnabled true
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    signingConfigs {
        release {
            keyAlias keystoreProperties['keyAlias']
            keyPassword keystoreProperties['keyPassword']
            storeFile keystoreProperties['storeFile'] ? file(keystoreProperties['storeFile']) : null
            storePassword keystoreProperties['storePassword']
        }
    }

    buildTypes {
        release {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            // TODO: Add your own signing config for the release build.
            // Signing with the debug keys for now, so `flutter run --release` works.
            signingConfig signingConfigs.release
            minifyEnabled true
            useProguard true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

flutter {
    source '../..'
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.google.firebase:firebase-firestore-ktx:21.5.0'
    implementation 'com.google.firebase:firebase-messaging:20.2.3'
    implementation 'com.android.support:multidex:1.0.3'
    implementation 'com.google.firebase:firebase-analytics:17.5.0'
}

apply plugin: 'com.google.gms.google-services'

proguard-rules.pro文件

## Flutter wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }
-keep class io.flutter.plugins.sharedpreferences**  { *; }
-dontwarn io.flutter.embedding.**

## Gson rules
# Gson uses generic type information stored in a class file when working with fields. Proguard
# removes such information by default, so configure it to keep all of it.
-keepattributes Signature

# For using GSON @Expose annotation
-keepattributes *Annotation*

# Gson specific classes
-dontwarn sun.misc.**
#-keep class com.google.gson.stream.** { *; }

# Prevent proguard from stripping interface information from TypeAdapter, TypeAdapterFactory,
# JsonSerializer, JsonDeserializer instances (so they can be used in @JsonAdapter)
-keep class * extends com.google.gson.TypeAdapter
-keep class * implements com.google.gson.TypeAdapterFactory
-keep class * implements com.google.gson.JsonSerializer
-keep class * implements com.google.gson.JsonDeserializer

# Prevent R8 from leaving Data object members always null
-keepclassmembers,allowobfuscation class * {
  @com.google.gson.annotations.SerializedName <fields>;
}

## flutter_local_notification plugin rules
-keep class com.dexterous.** { *; }

Answer 1

尝试将 get_it 版本降级为： get_it: ^3.0.3 然后在命令 window 中写入：扑干净然后重新安装应用程序

Answer 2

问题是缩小的应用程序删除了一些重要的代码，所以它必须在混淆文件中解决所以我在混淆文件的底部添加了这一行

-keepclasseswithmembers class * {*;}

所以它保留所有类和功能而不删除任何代码这个solution帮助了我

MissingPluginException（未在通道 plugins.flutter.io/shared_preferences 上找到方法 getAll 的实现） - 现有解决方案无效 -

MissingPluginException(No implementation found for method getAll on channel plugins.flutter.io/shared_preferences) -exist solutions didn't work-

android

proguard

dart

build.gradle

flutter