我正在使用Firebase（这是Flutter应用）身份验证的常规用例。登录失败后，出现预期的错误。每当我成功登录时，它都会通过以下消息使我的应用程序崩溃：
E/JavaBinder( 4289): *** Uncaught remote exception! (Exceptions are not yet supported across processes.)
E/JavaBinder( 4289): java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzam.zzc(Unknown Source:22)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzam.zzde(Unknown Source:17)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzam.zzdd(Unknown Source:8)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzan.zzdf(Unknown Source:1)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzm.isAnonymous(Unknown Source:47)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzat.zzi(Unknown Source:57)
E/JavaBinder( 4289): at com.google.firebase.auth.internal.zzat.zzg(Unknown Source:10)
E/JavaBinder( 4289): at com.google.firebase.auth.FirebaseAuth.zza(Unknown Source:62)
E/JavaBinder( 4289): at com.google.firebase.auth.FirebaseAuth$zzb.zza(Unknown Source:5)
E/JavaBinder( 4289): at com.google.firebase.auth.api.internal.zzcr.zzdx(Unknown Source:15)
E/JavaBinder( 4289): at com.google.firebase.auth.api.internal.zzen.zzen(Unknown Source:35)
E/JavaBinder( 4289): at com.google.firebase.auth.api.internal.zzen.zza(Unknown Source:41)
E/JavaBinder( 4289): at com.google.firebase.auth.api.internal.zzep.zza(Unknown Source:9)
E/JavaBinder( 4289): at com.google.firebase.auth.api.internal.zzdx.dispatchTransaction(Unknown Source:9)
E/JavaBinder( 4289): at com.google.android.gms.internal.firebase_auth.zza.onTransact(Unknown Source:13)
E/JavaBinder( 4289): at android.os.Binder.execTransact(Binder.java:731)
E/JavaBinder( 4289): Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.util.ArrayMap" on path: DexPathList[[zip file "/data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/lib/x86, /data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/base.apk!/lib/x86, /system/lib]]
E/JavaBinder( 4289): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
E/JavaBinder( 4289): at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
E/JavaBinder( 4289): at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
E/JavaBinder( 4289): ... 16 more
E/AndroidRuntime( 4289): FATAL EXCEPTION: Binder:4289_4
E/AndroidRuntime( 4289): Process: com.example.smartmoney, PID: 4289
E/AndroidRuntime( 4289): java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/util/ArrayMap;
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzam.zzc(Unknown Source:22)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzam.zzde(Unknown Source:17)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzam.zzdd(Unknown Source:8)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzan.zzdf(Unknown Source:1)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzm.isAnonymous(Unknown Source:47)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzat.zzi(Unknown Source:57)
E/AndroidRuntime( 4289): at com.google.firebase.auth.internal.zzat.zzg(Unknown Source:10)
E/AndroidRuntime( 4289): at com.google.firebase.auth.FirebaseAuth.zza(Unknown Source:62)
E/AndroidRuntime( 4289): at com.google.firebase.auth.FirebaseAuth$zzb.zza(Unknown Source:5)
E/AndroidRuntime( 4289): at com.google.firebase.auth.api.internal.zzcr.zzdx(Unknown Source:15)
E/AndroidRuntime( 4289): at com.google.firebase.auth.api.internal.zzen.zzen(Unknown Source:35)
E/AndroidRuntime( 4289): at com.google.firebase.auth.api.internal.zzen.zza(Unknown Source:41)
E/AndroidRuntime( 4289): at com.google.firebase.auth.api.internal.zzep.zza(Unknown Source:9)
E/AndroidRuntime( 4289): at com.google.firebase.auth.api.internal.zzdx.dispatchTransaction(Unknown Source:9)
E/AndroidRuntime( 4289): at com.google.android.gms.internal.firebase_auth.zza.onTransact(Unknown Source:13)
E/AndroidRuntime( 4289): at android.os.Binder.execTransact(Binder.java:731)
E/AndroidRuntime( 4289): Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.util.ArrayMap" on path: DexPathList[[zip file "/data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/base.apk"],nativeLibraryDirectories=[/data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/lib/x86, /data/app/com.example.smartmoney-X1P2O9i7a7t81s9vttyrlA==/base.apk!/lib/x86, /system/lib]]
E/AndroidRuntime( 4289): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
E/AndroidRuntime( 4289): at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
E/AndroidRuntime( 4289): at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
E/AndroidRuntime( 4289): ... 16 more
I/Process ( 4289): Sending signal. PID: 4289 SIG: 9
Lost connection to device.
很抱歉错误转储。我已经为这个错误工作了好几个小时。这是项目级别的gradle：
buildscript {
repositories {
google()
jcenter()
maven {
url 'https://maven.fabric.io/public'
}
}
dependencies {
classpath 'com.android.tools.build:gradle:3.2.1'
classpath 'com.google.gms:google-services:4.2.0'
classpath 'io.fabric.tools:gradle:1.31.0' // Crashlytics plugin
classpath 'com.google.firebase:perf-plugin:1.3.1' // Performance Monitoring plugin
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}
这是我的应用程序级别的gradle：
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: 'io.fabric'
apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.google.firebase.firebase-perf'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 28
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.example.smartmoney"
minSdkVersion 21
targetSdkVersion 28
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
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 {
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
implementation 'com.google.firebase:firebase-core:17.0.1' // Firebase core
implementation 'com.crashlytics.sdk.android:crashlytics:2.10.1' // Firebase crashlytics
implementation 'com.google.firebase:firebase-perf:18.0.1' // Firebase performance
//implementation 'com.firebaseui:firebase-ui-auth:4.3.1'
}
这是我的pubspec文件：
name: smartmoney
description: A new Flutter project.
# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1
environment:
sdk: ">=2.1.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
flutter_bloc: ^0.14.0
toast: ^0.1.5
charts_flutter: ^0.6.0
firebase_auth: ^0.14.0
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.2
dev_dependencies:
flutter_test:
sdk: flutter
# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
# To add assets to your application, add an assets section, like this:
# assets:
# - images/a_dot_burr.jpeg
# - images/a_dot_ham.jpeg
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.io/assets-and-images/#resolution-aware.
# For details regarding adding assets from package dependencies, see
# https://flutter.io/assets-and-images/#from-packages
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schyler
# fonts:
# - asset: fonts/Schyler-Regular.ttf
# - asset: fonts/Schyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see https://flutter.io/custom-fonts/#from-packages
感谢您的帮助。除了我猜想Java库可能有些混乱之外，我对此没有其他意见。这没有什么意义，因为我重建了项目，但仍然失败。因此，我或多或少都对此scratch之以鼻。
答案 0 :(得分：2)
请在gradle.properties文件中添加以下行。它对我有用。
android.useAndroidX = true
android.enableJetifier = true
谢谢