请不要认为这是任何其他旧职位的副本。
今天上午，我通过重构迁移到androidx，将我的一个旧应用程序迁移到androidx。
在此之后，我无法运行我的应用程序。我犯了个错误
任务“”的执行失败：app:transformclasseswithretrolambdafordebug'. org.gradle.api.tasks.compile.compileoptions.getbootclasspath（）ljava/lang/string；
我试过很多其他与此相关的问题。例如：任务“”的执行失败：app:compileretrolambdadebug'

* Module

**apply plugin: 'com.android.application'

apply plugin: 'me.tatarka.retrolambda'
android {
    compileSdkVersion 28 //tried with 29 also
    buildToolsVersion '28.0.3'
    defaultConfig {
        applicationId "com.solver.inventory"
        minSdkVersion 21
        targetSdkVersion 28
        versionCode 2
        versionName "Beta V2.0"
        testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
        vectorDrawables.useSupportLibrary true
        multiDexEnabled true
    }
    dexOptions {
        javaMaxHeapSize "4g"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    packagingOptions {
        //Use “exclude” to point at the specific file (or files) that Android Studio is complaining about//
        exclude 'META-INF/rxjava.properties'
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
retrolambda {
    jvmArgs '-noverify'
}
dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
        exclude group: 'com.android.support', module: 'support-annotations'
    })
    implementation(name: 'customprint', ext: 'aar')
    implementation 'com.github.KingsMentor:MobileVisionBarcodeScanner:2.0.0'
implementation 'androidx.appcompat:appcompat'
    implementation "androidx.cardview:cardview:1.0.0"
    implementation 'androidx.recyclerview:recyclerview'
    implementation 'com.google.android.material:material:1.0.0'
    implementation 'androidx.legacy:legacy-support-v4'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    implementation 'io.reactivex.rxjava2:rxjava:2.1.0'
    implementation 'io.reactivex.rxjava2:rxandroid:2.0.1'
    implementation 'com.squareup.retrofit2:retrofit:2.3.0'
    implementation 'com.google.code.gson:gson:2.8.1'
    implementation 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
    implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
    implementation 'com.squareup.okhttp3:okhttp:3.8.1'
    implementation 'com.mcxiaoke.volley:library:1.0.6'
    implementation 'org.apache.commons:commons-io:1.3.2'
    implementation 'com.jakewharton.rxbinding:rxbinding-appcompat-v7:0.4.0'
    implementation 'com.getbase:floatingactionbutton:1.10.1'
    implementation 'com.google.firebase:firebase-messaging:21.0.1'
    implementation 'com.annimon:stream:1.2.1'
    implementation 'com.itextpdf:itextpdf:5.0.6'
    implementation 'com.airbnb.android:lottie:2.5.5'
    implementation('androidx.room:room-runtime:2.0.0') {
        exclude group: 'com.android.support'
    }
    implementation('androidx.room:room-rxjava2:2.0.0') {
        exclude group: 'com.android.support'
    }
    annotationProcessor 'androidx.room:room-compiler:2.0.0'
    testImplementation 'junit:junit:4.12'
    implementation 'com.itextpdf:itextpdf:5.5.13'
    implementation 'com.itextpdf.tool:xmlworker:5.4.1'
}
repositories {
    flatDir {
        dirs 'libs'
    }
}
apply plugin: 'com.google.gms.google-services'**

• 项目

buildscript {
    repositories {
        jcenter()
    }
    repositories {

        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:4.1.0'
        classpath 'me.tatarka:gradle-retrolambda:3.7.0' //Tried 3.7.1 also
        classpath 'com.google.gms:google-services:4.3.4'
    }
}

allprojects {
    repositories {
        jcenter()
        maven { url "https://maven.google.com" }
        maven { url "https://jitpack.io" }

        google()
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}

我试过各种链接的说明。但我还是犯了同样的错误。
谁能帮我解决这个问题。。。。。。请