Error: Execution failed for task ':app:clean'. Unable to delete file

Question

I\'m trying to rebuild my Android Studio Gradle project (containing mostly Kotlin code), but it started to throw an UnableToDeleteFileException during the clean

Answer 1

Try File -> Invalidate Caches and Restart

This worked for me

Answer 2

I was facing same issue on Android Studio 2.2 preview 1, solution by @AndresSuarez was correct but for some reasons I couldn't find JAVA TM process in my task manager. So I tried the following solution and it worked -

Open command prompt and type TASKKILL /F /IM java.exe. This will kill all JAVA TM processes automatically. Now re-compile the app again, it will work.

Additionally, you can create a .bat file, add the above code in it and run it every time you face the issue.

Answer 3

i simply run cmd command - > gradlew clean , And it fix the issue

Answer 4

I had the same issue after moving my project from D: to G: drive but disk checking solved my issue

I used chkdsk /f /r /x G: ** here some command line switches were used:**

/F Fixes errors on the disk

/R Locates bad sectors and recovers readable information (implies /F)

/X Forces the volume to dismount first if necessary (implies /F) (important)

Note: /X is important because it will dismount the drive and you can manually delete the build directory of your project,

now rebuild the project

Answer 5

As suggested in the bug report, uncommenting the line

idea.jars.nocopy=false

in the idea.properties file has solved the issue for me.

Note that this needs to be done every time Android Studio updates.

Answer 6

For me, the culprit is adb holding onto the apk file since I utilise it to install and start the application on my physical device through command line.

So simply:

Task Manager > End process adb.exe

And then the file is free to be deleted and the project may be cleaned