Android Studio not showing java class source

Question

I've searched this question and tried the proposed solutions with no success. I have a project which when I go to view the source file for lets say Fragment it takes me to the java class just fine.

Now when I go to File -> new project and go through all the same set up procedure. Now when I click the source for Fragment I am taken to the decompile class file.

My new project is SDK 28 and i've performed updates, but they don't change anything. By setting my compileSDKVersion to 27 and adjusting the dependencies accordingly, it works. But it should just work with SDK 28 and I don't understand what im missing

In the photo below you can see I have the sources for API28 installed

Also when I click the Download Sources option below, I receive the following IDE error

java.util.NoSuchElementException
at java.util.Collections$EmptyIterator.next(Collections.java:4189)
at org.jetbrains.plugins.gradle.util.GradleAttachSourcesProvider.getSourceFile(GradleAttachSourcesProvider.java:160)
at org.jetbrains.plugins.gradle.util.GradleAttachSourcesProvider.access$100(GradleAttachSourcesProvider.java:59)
at org.jetbrains.plugins.gradle.util.GradleAttachSourcesProvider$1$1.onSuccess(GradleAttachSourcesProvider.java:126)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$7.execute(ExternalSystemUtil.java:876)
at com.intellij.openapi.externalSystem.util.ExternalSystemUtil$9.run(ExternalSystemUtil.java:905)
at com.intellij.openapi.progress.impl.CoreProgressManager$TaskRunnable.run(CoreProgressManager.java:713)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:157)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:543)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:488)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:94)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:144)
at com.intellij.openapi.progress.impl.ProgressManagerImpl$2.run(ProgressManagerImpl.java:165)
at com.intellij.openapi.application.impl.ApplicationImpl$1.run(ApplicationImpl.java:315)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

My gradle file has the correct SDK set and you can see the .jar folders in the external libraries section of the project structure

but when I click source all I see is Decompile Class!!

Answer 1

I'm gonna chalk this up to Google not yet releasing Android P source code, since when I change my SDK to 27, there is no problem and I have un/reinstalled SDK Platform 28 multiple times. I'll try again in a couple weeks and check if it has been released, until then I can continue my project with API 27.

Thanks!