im facing a strange problem in eclipse adt. I wanted to clean up my workspace and deleted all the double appcombat v7 files, and wanted to keep only one of it. it seemed that eclipse always generated a new folder for that.
so after doing so, all my projects crushed...the R.Java Files are missing and nothing works at all. already tried to reimpost the appcombat v7 files, eclipse is arguing there too.
At the beginning Eclipse tells me i aint got the newest version, but i downloaded and installed elipse without any better achievement.
Cleaning did not work for me, i also installed eclipse new, no changes too
HELP!HELP!HELP
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I am trying to compile an IntelliJ project, and have been working on it for over a month with no issues. Today I tried to compile and the changes I made in certain files did not make it into the compiled jar. As if by magic old versions of my code are being built, despite my attempts to completely remove any signs of the old code.
Somehow, refactoring the files to another name fixes it. This suddenly started happening today to multiple projects and I have no idea how to fix it. Help?
I've already tried manually deleting the cache for the application, and invalidating cache in the program itself.
No error messages, although I noticed that the files that refuse to change are blue in color, even after pushing to git.
Remove .idea folder and .iml files. Then open the project from IntelliJ as below.
I'm relatively new to programming. I recently installed Spring Tool Suite (the only option I found for the Mac install was for a 64bit version) for Mac on my system, and after installing I created a test project using a java main class to sys out "hello world" to the console. Everything was going swell until I tried to compile and run the program. The console spat back out at me "Error: Cannot find the main class TestApp" (Test App was the name of my main class). I checked it for errors, found none. I thought originally that the project was bad, so I deleted it and created a new project with a similar name. This project returned the same error.
I did some research and found that occasionally the .metadata file for a workspace can be corrupted, so I tried deleting that file, and reopening an STS workspace from the folder to regenerate it. This didn't work, so I tried creating a new file and starting a workspace there, then importing my test project into the new workspace. This also returned the same error.
So then I thought maybe my build path had been corrupted, so I checked and it was pointing to the correct files. I verified that the compiler is working and compiling the run, as the generated bin folder had a binary file in the project had a file in it. I tried I tried deleting the run config and starting over. Still no luck.
I tried project=> Clean, then re-running, then tried deleting the .bin file and re-running, which compiled and created a new binary file, but still returned the same error in the console.
I tried an uninstall and reinstall of STS, deleted all of the folders for my workspaces, and created new folders.
I tried fiddling around in the project libraries to see if any dependencies were missing, and found nothing.
I tried starting a SpringBoot app to see if maybe running Maven for dependencies would help somehow?
Someone suggested it may be an issue with my machine being older, and sure it's old, but it's fully updated, has an i5 processor, 16 gigs ram, and a full TB of storage. I would be really surprised if that were the issue.
These were all of the solutions that I could find, and I may have tried a few other things that I can't remember (I've been at it for the whole day now).
Does anyone have an idea what may be going on here? I'm at that point where punching the computer seems like a possibility. If it is my machine, I know that using the Eclipse IDE with an STS plugin may be more lightweight, but I've heard that the plugin is also kind of a pain to work with. Currently I've just uninstalled STS again, and may try installing again if I can find a new solution to try.
After some further research I came across a way to reconfigure JRE's. I'm not 100% sure of what I did to fix it, but after a full reinstall and new repo folder, I went to configure JRE's when creating a project and set both options to v1.8 . It's working now!
I am importing an Android Library into a new, fresh, blank Android Project in Eclipse.
When I select the library, everything is fine:
I right-click on the project again to check the library is still happily there...
But it isn't and now I'm very sad.
Has anyone seen this problem before? I've tried cleaning both projects, I've tried reopening Eclipse, I've tried restarting my computer, I've tried rebuilding the library project from scratch. It's really starting to confuse me.
Thanks
Solved.
Workspace, Installation and Libraries needed to all be located on the same physical drive. I guess this is a "feature" or nuance of Eclipse.
Thanks to AIL
I know that it has been asked thousands of times, but I really can't fix this at this momment. I'm trying to update an old project(already submitet to the play store). The only dependency was the v7 appcompact lybrary and so I added it to the new workspace and updated the existing project dep[endencie, but I'm still getting the strange R cannot be resolved to a variable error.
Here is what I'm doing and even if I'm 99% sure that it is what I have to do, it's not working.
Updating the project dependencie:
everything looks nice, but when I clean and rebuild the project, here is what happens:
and the problem is still there. I'm really going to start crying, because it was a working project, buta after switching to a new workspace and checking it out from my git repository, I can't get it working.
Do you have an idea what is going on? I know that I miss something small here, I know that it has been asked so many times, but I can't find an answer fitting on my case.
Remove library project android-support-v7-appcompact and add it again properly.
also check your package name in manifest file.
update SDK Build Tools on SDK Tools -> SDK Platform Tools, if not, please try it and clean & rebuild.
check imports to see any broken R.java imports. if there is "import android.R;" remove it.
check style and layout xmls to prevent any missing drawables or depreciates.
also see : R cannot be resolved - Android error
Just to tell my experience with this problem in a Java project with JDK8. In my case I was running the project in a Mac with Yosemite. Reading the specs. Android Studio and SDK, I've found that projects could be compiled up to Yosemite version.
I changed my environment variables to JDK7 and it worked!
I'm creating a clean project on ADT and I noticed that the gen folder is empty (with no R.java in it), not letting me run the project. I'm running ADT with all stuff up-to-date (as you can see here)
I already cleaned and built it in every possible way. I also tried to reimport the project, and nothing. There are no errors in the XML files.
I searched for a solution and I found a lot of people with the same problem, and in most cases the solution was to update the SDK tools, but it didn't work for me.
Is there a reason for this?
at the top of screen, click build -> rebuild project
Give it a few seconds. it worked for me, i hope it save you aswell
im using Android Studio(beta) 0.8.9
My R disappeared after i fiddled with sound files in my res/raw directory(converted them to different formats, figuring out how SoundPool class works...and suddenly there is red "R"'s everywhere!
Try right clicking on the project, then going to Android Tools > Fix Project Properties.
If that doesn't work, then try cleaning it before and possibly after that.
If R.java disappears, you usually have to recreate the project from scratch again.
There are many reasons for R.java missing issue, i use to face this issue frequently, some of my thoughts to debug this issue.
Try creating another test project using File->New->Project->Android->Android Application Project. After creating the project run the project in emulator. If every thing works then your setup is perfect.
Check your imports section of your java files, some times default R.java gets included which is from android package. In this case Remove that import and add correct import statement.
Check your "res" folder all the xml's should be well formed and valid.
Hope these debugging steps may help to find the root cause.
try deleting the r.java file in gen folder. when you run again after cleaning and building the project. It should recreate those files and it should work after that. Try that.
Other wise you might have to reinstall Eclipse as you have tried in so many different projects
Something I just noticed was that after I removed the auto-generated code for the menus (which I wasn't using) it started causing errors. Eventually when I cleaned with the menu xml's still in the file structure, my R file disappeared. I removed all entries in the menu folder and then cleaned again. This worked for my specific instance. Hope this helps others as well.