java.lang.ClassNotFoundException error on generating signed APK

[MVN]

Hi, I am trying to generate a signed apk in Android Studio but i am gettina a java.lang.ClassNotFoundException

I even tried generating apk on the default click tracker App that starts when we create a fresh new flutter project. 

There are no errors when i run on emulator or on my phone through usb. I searched online but didn't find a solution, i am a beginner in flutter, could someone please help me?

Following is the complete error.

Error:Internal error: (java.lang.ClassNotFoundException) com.google.wireless.android.sdk.stats.IntellijIndexingStats$Index

java.lang.ClassNotFoundException: com.google.wireless.android.sdk.stats.IntellijIndexingStats$Index

at java.net.URLClassLoader.findClass(URLClassLoader.java:382)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

at com.intellij.util.indexing.counters.IndexCounters.<clinit>(IndexCounters.java:34)

at com.intellij.util.indexing.impl.MapReduceIndex.<init>(MapReduceIndex.java:85)

at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex$CompilerMapReduceIndex.<init>(CompilerReferenceIndex.java:232)

at org.jetbrains.jps.backwardRefs.index.CompilerReferenceIndex.<init>(CompilerReferenceIndex.java:79)

at org.jetbrains.jps.backwardRefs.JavaCompilerBackwardReferenceIndex.<init>(JavaCompilerBackwardReferenceIndex.java:12)

at org.jetbrains.jps.backwardRefs.JavaBackwardReferenceIndexWriter.initialize(JavaBackwardReferenceIndexWriter.java:79)

at org.jetbrains.jps.incremental.java.JavaBuilder.buildStarted(JavaBuilder.java:148)

at org.jetbrains.jps.incremental.IncProjectBuilder.runBuild(IncProjectBuilder.java:363)

at org.jetbrains.jps.incremental.IncProjectBuilder.build(IncProjectBuilder.java:178)

at org.jetbrains.jps.cmdline.BuildRunner.runBuild(BuildRunner.java:139)

at org.jetbrains.jps.cmdline.BuildSession.runBuild(BuildSession.java:302)

at org.jetbrains.jps.cmdline.BuildSession.run(BuildSession.java:135)

at org.jetbrains.jps.cmdline.BuildMain$MyMessageHandler.lambda$channelRead0$0(BuildMain.java:228)

at org.jetbrains.jps.service.impl.SharedThreadPoolImpl.lambda$executeOnPooledThread$0(SharedThreadPoolImpl.java:42)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

[Micro Creatives]

im facing same problem but now fixed
close project by file>close project
and reopen studio with correct app source directory and keep connect on internet
and its will take some minutes to open and it will load gradle script automatically

then finish your work  

[vijay kholiya]

Do this.

File-->Settings-->Build, Execution, Deployment---> Java Compiler --> use Compiler as ' Eclipse' instead of javac