After everything running normally for a few weeks, we're suddenly getting the following message printed in Eclipse's Console every few seconds.
R.java was modified manually! Reverting to generated version!
The project still compiles and runs normally but seems to take a little longer than usual. Cleaning and rebuilding doesn't help the issue. The R file is getting generated correctly and no other errors are showing up throughout the project. The problem is present on both developers' machines.
Does anyone have any idea what's going on? Everything I could find deals with the R file not being generated. Thanks!
Well, that was an odd one. One of our developers accidentally checked in a version of the .project file that included a builder that was incompatible with the Android SDK. Even after finding that and removing the entry we still had to open the project's Properties > Builders and disable/reenable any of the builders in order for it to take effect. Restarting eclipse (or even my machine) wasn't enough.
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I have an Android Studio (Bumblebee 2021.1.1) project, composed of a main app plus two imported libraries, one Java and one native, developed by me.
At a certain point in time - I cannot recall any event related to this, - the compiler has stopped recognizing the code changes.
If I write something random (e.g. my name, or "aaaaa") within a code that has thus far compiled successfully , the IDE marks this in red as error, however, when I press Ctrl+F9 ("Make Project"), the compiler does not detect any change in code and ends with "BUILD SUCCESSFUL". This happens also when I explicitly save the modified code. The only way I have to make the compiler detect the change is to launch "Rebuild Project". I have tried all the solutions proposed in Android communities (delete ".idea" and ".gradle" folders, invalidate cache, etc.), to no avail. To be noted that I have other projects on the same PC with the same Android Studio instance, but the always-successful-build only happens with the project mentioned above. Can anybody please help me? This is very frustrating, because, even for a tiny code modification, I have to rebuild all, which is very time consuming. Thank you very much.
I have seen a repeated problem on my project when I upgraded from AS 4.1.2 to 4.2.1. I will make a simple change, and when I try to run (which invokes a build request) I see the error I have documented in this SO post.
I have also seen a problem whereby when I ask for a full rebuild (Build -> Rebuild Project) I get an error that AS cannot delete the 'build' directory. In fact, checking for the build directory in my file system shows that it is, in fact, gone. When I immediately request a rebuild a second time, it succeeds.
I have documented this in a bug report here.
I cannot imagine what setting might be in my project that could cause either of these errors, but hoping someone here might have an idea.
If I create a brand new sample project in the same top level directory (all my projects are in directories off of C:\BLD\AndroidStudioProjects), neither of the errors mentioned above occurs.
I updated tools in my Eclipse first by going to Help->Check For Updates and installing everything i that it suggested. Then by going to Window->Android SDK Manager and updating multiple things including my SDK version.
After I have finished my update all my Android projects got a nice red box with an x inside it. I explored the projects and noticed that none of them had any errors inside the project just the project itself had the error icon. I searched online and i found that other people had similar problems. So i thought i found the solution. Alas after cleaning and building the project I got additional error icons next to multiple java files in my projects. Eclipse cannot locate the automatically generated R files when it tries to import them and all the imports are selected red.
I tried deleting the whole content of .android directory (starting with specific few files then the whole content) but that did not bring desired results.
So i have deleted the newly generated files and restored all the old ones.
When I clean and build the projects again all the errors disappear but only until I try to run the project again and then same error appears:
Your project contains error(s), please fix it before running it.
I have also found a related question. It claims that there must be a problem with my xml files. I did not modify any of my xml files since updating the tools so I dont know what could cause them to have errors.
Any ideas as to what is going on??
I've found that eclipse is now picking up errors that it didn't pick up before, because they updated lint, you may have to check all your files and see if there is an error because of this, if it doesn't work try removing Android from the build and reattach it, clean the project, build project, make sure the activities are using the right R files and check what lint says, its like a little square with a tick in it I think.
I had exactly the same problem, solved by removing any imports of R in my code and then cleaning the project
Strangest thing just happened. Even though I have done this 2 times before I have again deleted all my files in .android folder exited my Eclipse and opened it back up again. All the errors were gone and most of my projects work correctly. I have spend a lot of time on this problem and i dont know how it got resolved but Im glad its working again.
have an odd one..
Using Eclipse Juno, and everything was working fine for the last couple months. At some point yesterday, while Eclipse was cleaning my project, something crashed - popped up the Windows error reporting. (Didn't catch the name of what crashed..)
Now, I have no R.java class in /gen, and nothing I've tried will generate it. On top of that, when doing a clean rebuild of the project, the Output window remains blank. (No errors, no status message.. nothing.)
Tried just about everything - including the latest which included reinstalling Eclipse and then ADT. Still hadn't helped. (I have NOT tried clearing the workspace metadata yet, will do that soon.)
Any thoughts on what else to check?
--Fox.
Edit: Updating a random file - either .java or an XML layout/drawable does not have any effect, still nothing. Also, removing saved preferences from workspace .metdata data didn't have an effect either.
Edit 2: Okay - not sure WHY it was happening, but creating a new project and the issue was corrected.
So somehow either the project settings (.settings or project.settings) must have gotten corrupted. I have the origianl project still, and am curious to see why it happened, but creating a new project and copying sources and resources over, and no more issue.
Thanks to all that offered comments - goes to show that any kind of little corruption can cause strange things to happen.
The reason in 99% of the cases is that you are missspelling something in some xml file.
The R class file won't appear until all xml files are correct.
I suggest look carefully into your XMLs for a very small syntax error.
Or try taking off 1 by 1, until you figure it out wich one is the problematic.
:) kind of annoying, i know.
If you don't have any errors in your xml files, you tried to reboot your eclipse, your emulator, then open the sdk manager and apply all update. My R have finally been generated.
I found this happened after updating my Android SDK Manager and related eclipse plugins. I am running in Ubuntu, and it would not let me update the plugins unless I ran as the root user (using "sudo eclipse")
This left some of the Android SDK Manager items, and the eclipse plugins, owned by root. This stopped the "clean" working on the project - it must have been something that had been added as the root user, and not accessible as my normal user.
I had to "chown" my eclipse directory and my Android SDK Manager directory so it was owned again by my normal user:
cd /home/myacct/android-sdk/
chown -R myacct:myacct *
After this the clean option worked, and R was regenerated.
This was it for me:
In your AndroidManifest.xml file, make sure that you have the SDK installed for the version number in android:minSdkVersion="##".
You can install SDKs from the Android SDK Manager, found under Window -> Android SDK Manager in Eclipse / ADT.
For me it ended up being gen/com/(appname)/R.java missing.
Not in my recycle bin, not anywhere... just took a surprise vacation and never returned.
I had a backup copy in a different folder. Copied it back and all's good now
When I try to run my Android project(which was working fine yesterday) I get the "Your project contains errors, please fix them before running your application" dialog. But my project has no errors. I've had this problem before, and the solution was always to Clean the project, but this time it isn't helping. The red X icon disappears from the project in the workspace, then reappears when I try to run it. Also restarted Eclipse so it rebuilds the project. Help?
Go to your .android folder and delete your debug certificate. In my computer it is in this path
E:\Users\blessan\.android
Inside that there is a file name 'debug.keystore'. Delete that,clean and try to build the project again. Sometimes this error is caused when the certificate expires.
There are a couple of reasons as to why this might happen. Give these problems / solutions a try.
Problem with your Manifest. These don't always show up, so give your Manifest a thorough check.
Suddenly missing / moved libraries or other dependencies. Right click your project, choose Properties and check the tabs under Java Build Path. When you accidentally remove / move a library file, or any other file the app is dependent on, it can cause an error like this without showing up as an actual error. However in the Build Path screen it will show with a little error sign.
Problems with your R.java. I had an issue with this before where there was a corrupt value in the R.java file. "cleaning" the project didn't fix it, but forcing Eclipse to rebuild the file due to me erasing it manually did.
Problem with a cached version of your app. This one is a real pain cause there are no pointers for it, but sometimes for some reason Eclipse decides to mess with a cached version of your app. This can cause anything from apps not working to apps showing images that have long been replaced by other ones or have been deleted entirely.
If the other fixes don't work, try navigating to your project folder and removing the /bin folder. After that, rebuild the project and try to run it.
I hope one of these works out for you.
This problem is occur some time when you replace new debug.keystore file with the old one.
delete deug.keystore may fix the problem