android - 无法实例化应用程序 androidx.multidex.MultiDexApplication : java. lang.ClassNotFoundException

Question

我有一个 Ionic 3 应用程序。从最近几天开始，该应用程序编译成功，但在设备中打开之前崩溃。在模拟器上，它工作正常。

发生此错误:

java.lang.RuntimeException: Unable to instantiate application androidx.multidex.MultiDexApplication: java.lang.ClassNotFoundException: Didn't find class "androidx.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/com.hip.app-_pUW6ZegoL_8FtN7BFysGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.hip.app-_pUW6ZegoL_8FtN7BFysGw==/lib/arm64, /system/lib64]]
    at android.app.LoadedApk.makeApplication(LoadedApk.java:1073)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5992)
    at android.app.ActivityThread.access$1200(ActivityThread.java:206)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1686)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6882)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/com.hip.app-_pUW6ZegoL_8FtN7BFysGw==/base.apk"],nativeLibraryDirectories=[/data/app/com.hip.app-_pUW6ZegoL_8FtN7BFysGw==/lib/arm64, /system/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:171)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50)
    at android.app.Instrumentation.newApplication(Instrumentation.java:1121)
    at android.app.LoadedApk.makeApplication(LoadedApk.java:1065)
    ... 9 more

我的项目.properties

target=android-28
android.library.reference.1=CordovaLib
android.library.reference.2=app
cordova.system.library.1=androidx.annotation:annotation:1.0.0
cordova.gradle.include.1=branch-cordova-sdk/app-rules.gradle
cordova.gradle.include.2=cordova-plugin-firebase-lib/app-build.gradle
cordova.system.library.2=com.google.android.gms:play-services-tagmanager:16.+
cordova.system.library.3=com.google.firebase:firebase-auth:18.+
cordova.system.library.4=com.google.firebase:firebase-core:17.+
cordova.system.library.5=com.google.firebase:firebase-messaging:19.+
cordova.system.library.6=com.google.firebase:firebase-config:18.+
cordova.system.library.7=com.google.firebase:firebase-perf:18.+

和

我的 build.gradle

buildscript {
    repositories {
        google()
        jcenter()
        maven { url 'https://maven.fabric.io/public' } // Fabrics Maven repository from cordova-plugin-firebase-lib


    }

    dependencies {

        classpath 'com.android.tools.build:gradle:3.3.0'

        classpath 'com.google.gms:google-services:4.2.0' // google-services dependency from cordova-plugin-firebase-lib

        classpath 'io.fabric.tools:gradle:1.25.4' // fabric dependency from cordova-plugin-firebase-lib
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        google() // Google's Maven repository from cordova-plugin-firebase-lib
    }

    project.ext {
      defaultBuildToolsVersion="28.0.3" 
      defaultMinSdkVersion=21 
      defaultTargetSdkVersion=28 
      defaultCompileSdkVersion=28 
    }
}

(模块:app)app/build.gradle:

apply plugin: 'com.android.application'

buildscript {
    repositories {
        mavenCentral()
        google()
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:3.3.0'
    }
}

// Allow plugins to declare Maven dependencies via build-extras.gradle.
allprojects {
    repositories {
        mavenCentral()
        jcenter()
    }
}

task wrapper(type: Wrapper) {
    gradleVersion = '4.10.3'
}

// Configuration properties. Set these via environment variables, build-extras.gradle, or gradle.properties.
// Refer to: http://www.gradle.org/docs/current/userguide/tutorial_this_and_that.html
ext {
    apply from: '../CordovaLib/cordova.gradle'

    // The value for android.compileSdkVersion.
    if (!project.hasProperty('cdvCompileSdkVersion')) {
        cdvCompileSdkVersion = null;
    }
    // The value for android.buildToolsVersion.
    if (!project.hasProperty('cdvBuildToolsVersion')) {
        cdvBuildToolsVersion = null;
    }
    // Sets the versionCode to the given value.
    if (!project.hasProperty('cdvVersionCode')) {
        cdvVersionCode = null
    }
    // Sets the minSdkVersion to the given value.
    if (!project.hasProperty('cdvMinSdkVersion')) {
        cdvMinSdkVersion = null
    }
    // Whether to build architecture-specific APKs.
    if (!project.hasProperty('cdvBuildMultipleApks')) {
        cdvBuildMultipleApks = null
    }
    // Whether to append a 0 "abi digit" to versionCode when only a single APK is build
    if (!project.hasProperty('cdvVersionCodeForceAbiDigit')) {
        cdvVersionCodeForceAbiDigit = null
    }
    // .properties files to use for release signing.
    if (!project.hasProperty('cdvReleaseSigningPropertiesFile')) {
        cdvReleaseSigningPropertiesFile = null
    }
    // .properties files to use for debug signing.
    if (!project.hasProperty('cdvDebugSigningPropertiesFile')) {
        cdvDebugSigningPropertiesFile = null
    }
    // Set by build.js script.
    if (!project.hasProperty('cdvBuildArch')) {
        cdvBuildArch = null
    }

    // Plugin gradle extensions can append to this to have code run at the end.
    cdvPluginPostBuildExtras = []
}

// PLUGIN GRADLE EXTENSIONS START
apply from: "../branch-cordova-sdk/app-rules.gradle"
apply from: "../cordova-plugin-firebase-lib/app-build.gradle"
// PLUGIN GRADLE EXTENSIONS END

def hasBuildExtras1 = file('build-extras.gradle').exists()
if (hasBuildExtras1) {
    apply from: 'build-extras.gradle'
}

def hasBuildExtras2 = file('../build-extras.gradle').exists()
if (hasBuildExtras2) {
    apply from: '../build-extras.gradle'
}

// Set property defaults after extension .gradle files.
if (ext.cdvCompileSdkVersion == null) {
    ext.cdvCompileSdkVersion = privateHelpers.getProjectTarget()
    //ext.cdvCompileSdkVersion = project.ext.defaultCompileSdkVersion
}
if (ext.cdvBuildToolsVersion == null) {
    ext.cdvBuildToolsVersion = privateHelpers.findLatestInstalledBuildTools()
    //ext.cdvBuildToolsVersion = project.ext.defaultBuildToolsVersion
}
if (ext.cdvDebugSigningPropertiesFile == null && file('../debug-signing.properties').exists()) {
    ext.cdvDebugSigningPropertiesFile = '../debug-signing.properties'
}
if (ext.cdvReleaseSigningPropertiesFile == null && file('../release-signing.properties').exists()) {
    ext.cdvReleaseSigningPropertiesFile = '../release-signing.properties'
}

// Cast to appropriate types.
ext.cdvBuildMultipleApks = cdvBuildMultipleApks == null ? false : cdvBuildMultipleApks.toBoolean();
ext.cdvVersionCodeForceAbiDigit = cdvVersionCodeForceAbiDigit == null ? false : cdvVersionCodeForceAbiDigit.toBoolean();
ext.cdvMinSdkVersion = cdvMinSdkVersion == null ? defaultMinSdkVersion : Integer.parseInt('' + cdvMinSdkVersion)
ext.cdvVersionCode = cdvVersionCode == null ? null : Integer.parseInt('' + cdvVersionCode)

def computeBuildTargetName(debugBuild) {
    def ret = 'assemble'
    if (cdvBuildMultipleApks && cdvBuildArch) {
        def arch = cdvBuildArch == 'arm' ? 'armv7' : cdvBuildArch
        ret += '' + arch.toUpperCase().charAt(0) + arch.substring(1);
    }
    return ret + (debugBuild ? 'Debug' : 'Release')
}

// Make cdvBuild a task that depends on the debug/arch-sepecific task.
task cdvBuildDebug
cdvBuildDebug.dependsOn {
    return computeBuildTargetName(true)
}

task cdvBuildRelease
cdvBuildRelease.dependsOn {
    return computeBuildTargetName(false)
}

task cdvPrintProps {
    doLast {
        println('cdvCompileSdkVersion=' + cdvCompileSdkVersion)
        println('cdvBuildToolsVersion=' + cdvBuildToolsVersion)
        println('cdvVersionCode=' + cdvVersionCode)
        println('cdvVersionCodeForceAbiDigit=' + cdvVersionCodeForceAbiDigit)
        println('cdvMinSdkVersion=' + cdvMinSdkVersion)
        println('cdvBuildMultipleApks=' + cdvBuildMultipleApks)
        println('cdvReleaseSigningPropertiesFile=' + cdvReleaseSigningPropertiesFile)
        println('cdvDebugSigningPropertiesFile=' + cdvDebugSigningPropertiesFile)
        println('cdvBuildArch=' + cdvBuildArch)
        println('computedVersionCode=' + android.defaultConfig.versionCode)
        android.productFlavors.each { flavor ->
            println('computed' + flavor.name.capitalize() + 'VersionCode=' + flavor.versionCode)
        }
    }
}

android {
    defaultConfig {

        multiDexEnabled true

        versionCode cdvVersionCode ?: new BigInteger("" + privateHelpers.extractIntFromManifest("versionCode"))
        applicationId privateHelpers.extractStringFromManifest("package")
      minSdkVersion 19

      if (cdvMinSdkVersion != null) {
            minSdkVersion cdvMinSdkVersion
        }
    }

    lintOptions {
      abortOnError false;
    }

    compileSdkVersion cdvCompileSdkVersion
    buildToolsVersion cdvBuildToolsVersion

    // This code exists for Crosswalk and other Native APIs.
    // By default, we multiply the existing version code in the
    // Android Manifest by 10 and add a number for each architecture.
    // If you are not using Crosswalk or SQLite, you can
    // ignore this chunk of code, and your version codes will be respected.

    if (Boolean.valueOf(cdvBuildMultipleApks)) {
        flavorDimensions "default"

        productFlavors {
            armeabi {
                versionCode defaultConfig.versionCode*10 + 1
                ndk {
                    abiFilters = ["armeabi"]
                }
            }
            armv7 {
                versionCode defaultConfig.versionCode*10 + 2
                ndk {
                    abiFilters = ["armeabi-v7a"]
                }
            }
            arm64 {
                versionCode defaultConfig.versionCode*10 + 3
                ndk {
                    abiFilters = ["arm64-v8a"]
                }
            }
            x86 {
                versionCode defaultConfig.versionCode*10 + 4
                ndk {
                    abiFilters = ["x86"]
                }
            }
            x86_64 {
                versionCode defaultConfig.versionCode*10 + 5
                ndk {
                    abiFilters = ["x86_64"]
                }
            }
        }
    } else if (Boolean.valueOf(cdvVersionCodeForceAbiDigit)) {
        // This provides compatibility to the default logic for versionCode before cordova-android 5.2.0
        defaultConfig {
            versionCode defaultConfig.versionCode*10
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    if (cdvReleaseSigningPropertiesFile) {
        signingConfigs {
            release {
                // These must be set or Gradle will complain (even if they are overridden).
                keyAlias = ""
                keyPassword = "__unset" // And these must be set to non-empty in order to have the signing step added to the task graph.
                storeFile = null
                storePassword = "__unset"
            }
        }
        buildTypes {
            release {
                signingConfig signingConfigs.release
            }
        }
        addSigningProps(cdvReleaseSigningPropertiesFile, signingConfigs.release)
    }

    if (cdvDebugSigningPropertiesFile) {
        addSigningProps(cdvDebugSigningPropertiesFile, signingConfigs.debug)
    }
}

/*
 * WARNING: Cordova Lib and platform scripts do management inside of this code here,
 * if you are adding the dependencies manually, do so outside the comments, otherwise
 * the Cordova tools will overwrite them
 */


dependencies {
    implementation fileTree(dir: 'libs', include: '*.jar')
    // SUB-PROJECT DEPENDENCIES START
    implementation(project(path: ":CordovaLib"))
    implementation "androidx.annotation:annotation:1.0.0"
    implementation "com.google.android.gms:play-services-tagmanager:16.+"
    implementation "com.google.firebase:firebase-auth:18.+"
    implementation "com.google.firebase:firebase-core:17.+"
    implementation "com.google.firebase:firebase-messaging:19.+"
    implementation "com.google.firebase:firebase-config:18.+"
    implementation "com.google.firebase:firebase-perf:18.+"
    // SUB-PROJECT DEPENDENCIES END
}

def promptForReleaseKeyPassword() {
    if (!cdvReleaseSigningPropertiesFile) {
        return;
    }
    if ('__unset'.equals(android.signingConfigs.release.storePassword)) {
        android.signingConfigs.release.storePassword = privateHelpers.promptForPassword('Enter key store password: ')
    }
    if ('__unset'.equals(android.signingConfigs.release.keyPassword)) {
        android.signingConfigs.release.keyPassword = privateHelpers.promptForPassword('Enter key password: ');
    }
}

gradle.taskGraph.whenReady { taskGraph ->
    taskGraph.getAllTasks().each() { task ->
      if(['validateReleaseSigning', 'validateSigningRelease', 'validateSigningArmv7Release', 'validateSigningX76Release'].contains(task.name)) {
         promptForReleaseKeyPassword()
      }
    }
}

def addSigningProps(propsFilePath, signingConfig) {
    def propsFile = file(propsFilePath)
    def props = new Properties()
    propsFile.withReader { reader ->
        props.load(reader)
    }

    def storeFile = new File(props.get('key.store') ?: privateHelpers.ensureValueExists(propsFilePath, props, 'storeFile'))
    if (!storeFile.isAbsolute()) {
        storeFile = RelativePath.parse(true, storeFile.toString()).getFile(propsFile.getParentFile())
    }
    if (!storeFile.exists()) {
        throw new FileNotFoundException('Keystore file does not exist: ' + storeFile.getAbsolutePath())
    }
    signingConfig.keyAlias = props.get('key.alias') ?: privateHelpers.ensureValueExists(propsFilePath, props, 'keyAlias')
    signingConfig.keyPassword = props.get('keyPassword', props.get('key.alias.password', signingConfig.keyPassword))
    signingConfig.storeFile = storeFile
    signingConfig.storePassword = props.get('storePassword', props.get('key.store.password', signingConfig.storePassword))
    def storeType = props.get('storeType', props.get('key.store.type', ''))
    if (!storeType) {
        def filename = storeFile.getName().toLowerCase();
        if (filename.endsWith('.p12') || filename.endsWith('.pfx')) {
            storeType = 'pkcs12'
        } else {
            storeType = signingConfig.storeType // "jks"
        }
    }
    signingConfig.storeType = storeType
}

for (def func : cdvPluginPostBuildExtras) {
    func()
}

// This can be defined within build-extras.gradle as:
//     ext.postBuildExtras = { ... code here ... }
if (hasProperty('postBuildExtras')) {
    postBuildExtras()
}

我正在使用命令行来创建和签署构建，但我也尝试:

在android studio中打开并同步项目

清洁工程

重建项目

Answer 1

我已经通过从项目中删除 MultiDex 并将 minSdkVersion 升级到 解决了这个问题。 21 .