How to clear Flutter s Build cache

Question

There seems to be a problem with flutter s build   I always need to perform RUN   Flutter Full Restart everytime I run the app to an emulator or device   Otherwise  the app loads a scaffold body which my code had from 2 weeks ago when I first started coding it   Here s the current source on pastebin  children   lt Widget gt             new Opacity                opacity  loader visible   1 0   0 0                child                new Container                    padding  const EdgeInsets all 32 0                     child  new CircularProgressIndicator                                  while here is the resulting render tree    I m guessing flutter has cached the old code and never bothered replacing it with the new one  but I am not sure how it s Hot Reload was implemented  Anyways  I don t think that it is necessary to load the old cache when we have already performed a full rebuild

User · Answer

Same issue with mine  New to Flutter  I m using VS build-in terminal to do flutter run  to run the app in iPhone  It gives me error Error when reading  lib student model dart   No such file     which is an old code version in my code  I have changed it to lib model student model dart  And I search this line  lib student model dart in the project  it appears filekernel snapshot d  containing it  So  it build the project with old code version  For me  Flutter clean is not working  Restart VS fix the issue  not sure the problem is due to Flutter or VS  And I m wondering if there is some command to just build flutter project without run

User · Answer

There are basically 3 alternatives to cleaning everything that you could try    flutter clean will delete the  build folder  Manually delete the  build folder  which is essentially the same as flutter clean  Or  as  R  mi Roudsselet pointed out  restart your IDE  as it might be caching some older error logs and locking everything up

User · Answer

You can run flutter clean   But that s most likely a problem with your IDE or similar  as flutter run creates a brand new apk  And hot reload push only modifications   Try running your app using the command line flutter run and then press r or R for respectively hot-reload and full-reload

User · Answer

I tried flutter clean and that didn t work for me  Then I went to wipe the emulator s data and voila  the cached issue was gone  If you have Android Studio you can launch the AVD Manager by following this Create and Manage virtual machine  Otherwise you can wipe the emulator s data using the emulator exe command line that s included in the android SDK  Simply follow this instructions here Start the emulator from the command line

User · Answer

I was facing the same issue and i found out that I was having two terminals in visual studio code  On first terminal it was already running my flutter project and on the other terminal I was running different solutions shared in this thread  Due to this reason no solution was working for me  So there are two ways you can solve this problem  1- Restart visual studio code  it will automatically close the terminals  2- Stop the terminal in which flutter project is already running and then run flutter clean command

User · Answer

Build cache is generated on application run time when a temporary file automatically generated in dart-tools folder  android folder and iOS folder  Clear command will delete the build tools and dart directories in flutter project so when we re-compile the project it will start from beginning  This command is mostly used when our project is showing debug error or running related error  In this answer we would Clear Build Cache in Flutter Android iOS App and Rebuild Project structure again   Open your flutter project folder in Command Prompt or Terminal  and type  flutter clean  command and press enter   After executing flutter clean command we would see that it will delete the dart-tools folder  android folder and iOS folder in our application with debug file  This might take some time depending upon your system speed to clean the project    For more info  see https   flutter-examples com clear-build-cache-in-flutter-app

User · Answer

I found a way to automate running the clean before you debug your code   Warning  this runs everytime you hit the button  even for hot restart    First  find the Run   Edit Configurations Menu Click the External tool     icon under Before launch  External tool  Activate tool window   Run External Tool  Configure it like so  Put     the working directory as a directory in your project

User · Answer

If in android studio  Tools- Flutter- Clean

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Or you can delete the  build folder under your  app-project folder manually if you cannot run flutter command

User · Answer

you can run flutter clean command

[dart] How to clear Flutter's Build cache?

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