MissingPluginException在通道plugins.flutter.io/shared_preferences上未找到方法getAll的实现-现有解决方案不起作用-

问题描述

我正在构建一个使用这些软件包的应用程序

• firebase_core：^ 0.5.0
• firebase_analytics：^ 5.0.16
• cloud_firestore：
• firebase_messaging：^ 7.0.0
• Flutter_local_notifications：^ 1.4.4 + 2
• 提供者：^ 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
• 图片选择器：^ 0.6.7 + 11
• 获取：^ 3.11.1

并且所有内容在调试模式下都可以正常工作，但是当我构建发行版时，出现该错误，我已经搜索了3天，所有我发现您需要

Flutter clean
pub get/ pub upgrade

然后它起作用了。但这对我不起作用

这是通过 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,'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.** { *; }

解决方法

尝试将get_it版本降级为： get_it：^ 3.0.3 然后在命令窗口中输入： 扑扑干净 然后重新安装该应用

,

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

-keepclasseswithmembers class * {*;}

因此可以保留所有类和功能，而无需删除任何代码 solution帮了我