Flutter 应用程序初始化期间发生 Firebase 错误

Question

在flutter应用程序中初始化firebase的代码不起作用，导致应用程序无法启动。弹出以下错误（使用应用程序的Web构建时没有发生）：

ERROR:D8: com.android.tools.r8.kotlin.H
ERROR:D8: com.android.tools.r8.kotlin.H
ERROR:D8: com.android.tools.r8.kotlin.H

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:mergeExtDexDebug'.
> Could not resolve all files for configuration ':app:debugRuntimeClasspath'.
   > Failed to transform firebase-auth-22.3.1.aar (com.google.firebase:firebase-auth:22.3.1) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=23, org.gradle.category=library, org.gradle.libraryelements=jar, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Execution failed for DexingWithClasspathTransform: C:\Users\ger81\.gradle\caches\transforms-3\53f3a323264ccff155272de0c3b13f19\transformed\jetified-firebase-auth-22.3.1-runtime.jar.
         > Error while dexing.
   > Failed to transform play-services-measurement-api-21.6.1.aar (com.google.android.gms:play-services-measurement-api:21.6.1) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=23, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Execution failed for DexingWithClasspathTransform: C:\Users\ger81\.gradle\caches\transforms-3\07dba32cabd2c5f0b2f4e3781e9709a7\transformed\jetified-play-services-measurement-api-21.6.1-runtime.jar.
         > Error while dexing.
   > Failed to transform recaptcha-18.4.0.aar (com.google.android.recaptcha:recaptcha:18.4.0) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=23, org.gradle.status=release, org.gradle.usage=java-runtime}.
      > Execution failed for DexingWithClasspathTransform: C:\Users\ger81\.gradle\caches\transforms-3\0908529605fc19e2a4c0517ed23e8088\transformed\jetified-recaptcha-18.4.0-runtime.jar.
         > Error while dexing.

我已将 SHA-1 证书添加到 firebase，因此这不再是问题。我怀疑问题出在 gradle 版本控制或 firebase 版本控制上，但我不确定。我尝试更改 minsdk 和 target sdk 版本，但这并没有改变结果。该代码确实从另一台计算机上运行，但是可能在配置部分上的某些内容在我安装的 android studio 中不起作用。

android/app/build.gradle

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "dev.flutter.flutter-gradle-plugin"
}

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

def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
    flutterVersionCode = '1'
}

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

android {
    namespace "com.example.censeo"
    compileSdk flutter.compileSdkVersion
    ndkVersion flutter.ndkVersion

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = '1.8'
    }

    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
`
    defaultConfig {
        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
        applicationId "com.example.censeo"
        // You can update the following values to match your application needs.
        // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
        minSdkVersion 23
        targetSdkVersion 29
        versionCode flutterVersionCode.toInteger()
        versionName flutterVersionName
    }

    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.debug
        }
    }
}

flutter {
    source '../..'
}

dependencies {}

android/build.gradle

allprojects {
    repositories {
        google()
        mavenCentral()
    }
}

rootProject.buildDir = '../build'
subprojects {
    project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
    project.evaluationDependsOn(':app')
}

tasks.register("clean", Delete) {
    delete rootProject.buildDir
}

Answer 1

您忘记启用 multidex

修改

android/app/build.gradle

，在适当的位置添加以下部分：

android {
    defaultConfig {
        multiDexEnabled true
    }
}
dependencies {
  implementation 'com.android.support:multidex:2.0.1' 
}