title: Failed to resolve variable '${project.groupId}'
body: <p>I migrate my project to AndroidX and I got these errors when building the project:</p>
  
  <pre><code>[TAG] Failed to resolve variable '${project.groupId}'   
  [TAG] Failed to resolve variable '${project.version}'   
  [TAG] Failed to resolve variable '${project.groupId}'   
  [TAG] Failed to resolve variable '${project.version}'   
  [TAG] Failed to resolve variable '${project.groupId}'   
  [TAG] Failed to resolve variable '${project.version}'   
  </code></pre>
  
  <p>I already tried several possible solutions:</p>
  
  <ul>
  <li>Clean Project</li>
  <li>Invalidate Cache and Restart</li>
  <li>Set <code>enableJetifier</code> to false</li>
  <li>Add option <code>--refresh-dependencies</code> to the compiler settings </li>
  </ul>
  
  <p>Here is my project gradle file:</p>
  
  <pre><code>buildscript {
      repositories {
          jcenter()
          maven {
              url 'https://maven.google.com/'
              name 'Google'
          }
          google()
          maven {
              url 'https://maven.fabric.io/public'
          }
      }
      dependencies {
          classpath 'com.android.tools.build:gradle:3.2.1'
          classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
          classpath 'com.google.gms:google-services:4.0.0'
          classpath 'io.fabric.tools:gradle:1.25.4'
      }
  }
  
  allprojects {
      repositories {
          jcenter()
          maven {
              url 'https://jitpack.io'
          }
          maven {
              url 'https://maven.google.com/'
              name 'Google'
          }
      }
  }
  
  task clean(type: Delete) {
      delete rootProject.buildDir
  }
  </code></pre>
  
  <p>And here is my app gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  apply plugin: 'io.fabric'
  
  android {
  
      compileOptions {
          sourceCompatibility JavaVersion.VERSION_1_8
          targetCompatibility JavaVersion.VERSION_1_8
      }
  
      dexOptions {
          javaMaxHeapSize "4g"
      }
  
      signingConfigs {
          //not showing this
      }
      compileSdkVersion 28
      defaultConfig {
          applicationId "my.app.package"
          minSdkVersion 21
          targetSdkVersion 28
          versionCode 59
          versionName "1.5.2"
  
          vectorDrawables.useSupportLibrary = true
          multiDexEnabled true
  
      }
      dataBinding {
          enabled = true
      }
      // workaround for "duplicate files during packaging of APK" issue
      // see https://groups.google.com/d/msg/adt-dev/bl5Rc4Szpzg/wC8cylTWuIEJ
      packagingOptions {
          exclude 'META-INF/ASL2.0'
          exclude 'META-INF/LICENSE'
          exclude 'META-INF/NOTICE'
  
          //Workaround to an issue due to google play-services 11.0.0 + rxJava
          exclude 'META-INF/rxjava.properties'
      }
  
      buildTypes {
          release {
              debuggable false
              minifyEnabled true
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
              signingConfig signingConfigs.release_config
  
          }
          debug {
              applicationIdSuffix ".debug"
              versionNameSuffix " - debug"
              debuggable true
          }
      }
  
      flavorDimensions "public"
  
      productFlavors {
          //not useful to show this
      }
  }
  
  ext {
      supportLibVersion = '28.0.0'
  }
  
  dependencies {
      implementation fileTree(include: ['*.jar'], dir: 'libs')
      testImplementation 'junit:junit:4.12'
      implementation 'org.jetbrains:annotations-java5:15.0'
      implementation project(path: ':security')
  
      implementation 'androidx.appcompat:appcompat:1.0.0'
      implementation 'androidx.legacy:legacy-support-v4:1.0.0'
      implementation 'androidx.legacy:legacy-support-v13:1.0.0'
      implementation 'com.google.android.material:material:1.0.0'
      implementation 'androidx.recyclerview:recyclerview:1.0.0'
      implementation 'androidx.cardview:cardview:1.0.0'
      implementation 'androidx.constraintlayout:constraintlayout:2.0.0-alpha2'
      implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0'
  
      implementation 'com.google.firebase:firebase-core:16.0.0'
      implementation 'com.crashlytics.sdk.android:crashlytics:2.9.3'
      implementation 'com.google.guava:guava:22.0-android'
      implementation 'com.google.android:flexbox:0.2.3'
      implementation 'com.google.code.gson:gson:2.8.0'
  
      implementation 'com.hannesdorfmann.fragmentargs:annotation:3.0.2'
      annotationProcessor 'com.hannesdorfmann.fragmentargs:processor:3.0.2'
  
      implementation 'com.f2prateek.dart:dart:2.0.0'
      annotationProcessor 'com.f2prateek.dart:dart-processor:2.0.0'
  
      implementation 'com.google.dagger:dagger:2.2'
      annotationProcessor 'com.google.dagger:dagger-compiler:2.2'
  
      implementation 'com.couchbase.lite:couchbase-lite-android:1.4.1'
      implementation 'com.couchbase.lite:couchbase-lite-android-sqlcipher:1.4.1'
  
      implementation 'com.squareup.retrofit2:retrofit:2.2.0'
      implementation 'com.squareup.retrofit2:converter-gson:2.2.0'
  
      implementation 'com.wang.avi:library:1.0.5'
      implementation 'com.nineoldandroids:library:2.4.0'
      implementation 'com.jaredrummler:twodscrollview:1.0.1'
  
      implementation 'com.arasthel:asyncjob-library:1.0.3'
      implementation('org.simpleframework:simple-xml:2.7.1') {
          exclude group: 'xpp3', module: 'xpp3'
          exclude group: 'stax', module: 'stax-api'
          exclude group: 'stax', module: 'stax'
      }
  
      implementation 'io.reactivex:rxandroid:1.2.1'
      implementation 'io.reactivex:rxjava:1.1.6'
  
      debugImplementation 'com.squareup.leakcanary:leakcanary-android:1.5.4'
      releaseImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.4'
      testImplementation 'com.squareup.leakcanary:leakcanary-android-no-op:1.5.4'
  
      implementation 'com.github.daniel-stoneuk:material-about-library:2.2.1'
      implementation 'org.apache.commons:commons-lang3:3.4'
  
      implementation('com.github.hotchemi:permissionsdispatcher:3.0.1') {
          exclude module: "support-v13"
      }
      annotationProcessor "com.github.hotchemi:permissionsdispatcher-processor:3.0.1"
  
      implementation 'com.pascalwelsch.compositeandroid:activity:27.0.0'
      implementation 'com.pascalwelsch.compositeandroid:fragment:27.0.0'
  
      implementation 'commons-codec:commons-codec:1.10'
  
      implementation 'com.jakewharton.timber:timber:4.7.1'
      implementation 'com.firebase:firebase-jobdispatcher:0.8.5'
  
  
  }
  
  apply plugin: 'com.google.gms.google-services'
  
  // https://stackoverflow.com/a/49981467/3520621
  configurations {
      cleanedAnnotations
      compile.exclude group: 'org.jetbrains' , module:'annotations'
  }
  </code></pre>
  
  <hr>
  
  <p><strong>UPDATE</strong></p>
  
  <p>I run <code>gradlew assembleDebug --stacktrace --debug --info</code> and here are some more info:</p>
  
  <pre><code>...
  Caused by: org.gradle.api.artifacts.transform.ArtifactTransformException: Failed to transform file 'dagger-compiler-2.2.jar' to match attributes {artifactType=processed-jar} using transform JetifyTransform
  ...
  Caused by: java.lang.RuntimeException: Failed to transform 'C:\Users\me\.gradle\caches\modules-2\files-2.1\com.google.dagger\dagger-compiler\2.2\e411f732e5cd9697cdb291f6073b0d6ee2352023\dagger-compiler-2.2.jar' using Jetifier. Reason: The type does not support '.' as package separator! Received 'java.lang.Object;Ljava.lang.Class'.. (Run with --stacktrace for more details.) To disable Jetifier, set android.enableJetifier=false in your gradle.properties file.
  </code></pre>
  
  <p>So it seems <strong>jetifier</strong> and <strong>dagger</strong> are the cause, but <strong>jetifier</strong> is necessary for the migration to AndroidX and I don't want to remove <strong>dagger</strong>.</p>
  
  <p>If I set <code>android.enableJetifier=false</code> I have more than 50 issues about DataBinding.</p>
  
  <hr>
  
  <p><strong>UPDATE 2</strong>
  Here is the full Exception</p>
  
  <pre><code>org.gradle.api.internal.artifacts.ivyservice.DefaultLenientConfiguration$ArtifactResolveException: Could not resolve all files for configuration ':app:devDebugAnnotationProcessorClasspath'.
          at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.rethrowFailure(DefaultConfiguration.java:944)
          at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration.access$1600(DefaultConfiguration.java:120)
          at org.gradle.api.internal.artifacts.configurations.DefaultConfiguration$ConfigurationFileCollection.getFiles(DefaultConfiguration.java:918)
          at org.gradle.api.internal.file.AbstractFileCollection.iterator(AbstractFileCollection.java:68)
          at org.gradle.api.internal.changedetection.state.AbstractFileCollectionSnapshotter$FileCollectionVisitorImpl.visitCollection(AbstractFileCollectionSnapshotter.java:72)
          at org.gradle.api.internal.file.AbstractFileCollection.visitRootElents(AbstractFileCollection.java:234)
          at org.gradle.api.internal.file.CompositeFileCollection.visitRootElents(CompositeFileCollection.java:185)
          at org.gradle.api.internal.changedetection.state.AbstractFileCollectionSnapshotter.snapshot(AbstractFileCollectionSnapshotter.java:55)
          at org.gradle.api.internal.changedetection.state.DefaultClasspathSnapshotter.snapshot(DefaultClasspathSnapshotter.java:42)
          at org.gradle.api.internal.changedetection.state.CacheBackedTaskHistoryRepository.snapshotTaskFiles(CacheBackedTaskHistoryRepository.java:329)
          at org.gradle.api.internal.changedetection.state.CacheBackedTaskHistoryRepository.createExecution(CacheBackedTaskHistoryRepository.java:151)
          at org.gradle.api.internal.changedetection.state.CacheBackedTaskHistoryRepository.access$100(CacheBackedTaskHistoryRepository.java:61)
          at org.gradle.api.internal.changedetection.state.CacheBackedTaskHistoryRepository$1.getCurrentExecution(CacheBackedTaskHistoryRepository.java:111)
          at org.gradle.api.internal.changedetection.changes.DefaultTaskArtifactStateRepository$TaskArtifactStateImpl.getStates(DefaultTaskArtifactStateRepository.java:208)
          at org.gradle.api.internal.changedetection.changes.DefaultTaskArtifactStateRepository$TaskArtifactStateImpl.isUpToDate(DefaultTaskArtifactStateRepository.java:93)
          at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:50)
          at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
          at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:59)
          at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:101)
          at org.gradle.api.internal.tasks.execution.FinalizeInputFilePropertiesTaskExecuter.execute(FinalizeInputFilePropertiesTaskExecuter.java:44)
          at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:91)
          at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:62)
          at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:59)
          at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
          at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
          at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:256)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:249)
          at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:238)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
          at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:663)
          at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:597)
          at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98)
          at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
          at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
          at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
  Caused by: org.gradle.api.artifacts.transform.ArtifactTransforxception: Failed to transform file 'dagger-compiler-2.2.jar' to match attributes {artifactType=processed-jar} using transform JetifyTransform
          at org.gradle.api.internal.artifacts.transform.UserCodeBackedTransforr.transform(UserCodeBackedTransforr.java:89)
          at org.gradle.api.internal.artifacts.transform.TransformArtifactOperation.run(TransformArtifactOperation.java:41)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor.access$900(DefaultBuildOperationExecutor.java:63)
          at org.gradle.internal.progress.DefaultBuildOperationExecutor$ParentPreservingQueueWorker.execute(DefaultBuildOperationExecutor.java:378)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable.runOperation(DefaultBuildOperationQueue.java:230)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable.access$600(DefaultBuildOperationQueue.java:172)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable$1.call(DefaultBuildOperationQueue.java:209)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable$1.call(DefaultBuildOperationQueue.java:203)
          at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:152)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable.runBatch(DefaultBuildOperationQueue.java:202)
          at org.gradle.internal.operations.DefaultBuildOperationQueue$WorkerRunnable.run(DefaultBuildOperationQueue.java:177)
          ... 3 more
  Caused by: java.lang.RuntiException: Failed to transform 'C:\Users\martin\.gradle\caches\modules-2\files-2.1\com.google.dagger\dagger-compiler\2.2\e411f732e5cd9697cdb291f6073b0d6ee2352023\dagger-compiler-2.2.jar' using Jetifier. Reason: The type does not supp
  ort '.' as package separator! Received 'java.lang.Object;Ljava.lang.Class'.. (Run with --stacktrace for more details.) To disable Jetifier, set android.enableJetifier=false in your gradle.properties file.
          at com.android.build.gradle.internal.dependency.JetifyTransform.transform(JetifyTransform.kt:204)
          at org.gradle.api.internal.artifacts.transform.TransformArtifactsAction.apply(TransformArtifactsAction.java:44)
          at org.gradle.api.internal.artifacts.transform.TransformArtifactsAction.apply(TransformArtifactsAction.java:29)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$TransformAction.execute(DefaultTransfordFileCache.java:224)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$TransformAction.execute(DefaultTransfordFileCache.java:211)
          at org.gradle.internal.resource.local.DefaultPathKeyFileStore$1.execute(DefaultPathKeyFileStore.java:111)
          at org.gradle.internal.resource.local.DefaultPathKeyFileStore$1.execute(DefaultPathKeyFileStore.java:107)
          at org.gradle.internal.resource.local.DefaultPathKeyFileStore.doAdd(DefaultPathKeyFileStore.java:160)
          at org.gradle.internal.resource.local.DefaultPathKeyFileStore.add(DefaultPathKeyFileStore.java:107)
          at org.gradle.internal.resource.local.DefaultPathKeyFileStore.add(DefaultPathKeyFileStore.java:50)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$1$1.create(DefaultTransfordFileCache.java:143)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$1$1.create(DefaultTransfordFileCache.java:122)
          at org.gradle.cache.internal.LockOnDemandCrossProcessCacheAccess.withFileLock(LockOnDemandCrossProcessCacheAccess.java:89)
          at org.gradle.cache.internal.DefaultCacheAccess.withFileLock(DefaultCacheAccess.java:193)
          at org.gradle.cache.internal.DefaultPersistentDirectoryStore.withFileLock(DefaultPersistentDirectoryStore.java:158)
          at org.gradle.cache.internal.DefaultCacheFactory$ReferenceTrackingCache.withFileLock(DefaultCacheFactory.java:187)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$1.create(DefaultTransfordFileCache.java:122)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache$1.create(DefaultTransfordFileCache.java:115)
          at org.gradle.cache.internal.ProducerGuard$AdaptiveProducerGuard.guardByKey(ProducerGuard.java:97)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache.loadIntoCache(DefaultTransfordFileCache.java:115)
          at org.gradle.api.internal.artifacts.transform.DefaultTransfordFileCache.getResult(DefaultTransfordFileCache.java:107)
          at org.gradle.api.internal.artifacts.transform.UserCodeBackedTransforr.transform(UserCodeBackedTransforr.java:87)
          ... 16 more
  Caused by: java.lang.IllegalArguntException: The type does not support '.' as package separator! Received 'java.lang.Object;Ljava.lang.Class'.
          at com.android.tools.build.jetifier.core.type.JavaType.&lt;init&gt;(JavaType.kt:28)
          at com.android.tools.build.jetifier.processor.transform.bytecode.asm.CustomRemapper.mapValue(CustomRemapper.kt:49)
          at org.objectweb.asm.commons.thodRemapper.visitLdcInsn(thodRemapper.java:179)
          at org.objectweb.asm.ClassReader.readCode(ClassReader.java:1582)
          at org.objectweb.asm.ClassReader.readthod(ClassReader.java:1126)
          at org.objectweb.asm.ClassReader.accept(ClassReader.java:698)
          at org.objectweb.asm.ClassReader.accept(ClassReader.java:500)
          at com.android.tools.build.jetifier.processor.transform.bytecode.ByteCodeTransforr.runTransform(ByteCodeTransforr.kt:39)
          at com.android.tools.build.jetifier.processor.Processor.visit(Processor.kt:328)
          at com.android.tools.build.jetifier.processor.archive.ArchiveFile.accept(ArchiveFile.kt:41)
          at com.android.tools.build.jetifier.processor.Processor.visit(Processor.kt:316)
          at com.android.tools.build.jetifier.processor.archive.Archive.accept(Archive.kt:66)
          at com.android.tools.build.jetifier.processor.Processor.transformLibrary(Processor.kt:312)
          at com.android.tools.build.jetifier.processor.Processor.transform(Processor.kt:175)
          at com.android.build.gradle.internal.dependency.JetifyTransform.transform(JetifyTransform.kt:199)
          ... 37 more
  </code></pre>