When cleaning out my Workspace folder for a clearer view in Eclipse, I deleted android-support-v7-appcompat project thinking it was a sample code I downloaded a while ago. I figured out it wasn't a wise move and restored it back, importing it from Eclipse. I now have a problem accessing the R elements, even in new automatically generated projects. For example accessing the following elements gives a cannot be resolved or is not a field error on the last element:
R.layout.activity_crime, R.menu.crime, R.id.action_settings. I tried to rebuild the project, deleting the gen folder so R.java would regenerate but nothing changes. Why is this happening and how can I fix it?
A brief aside - it is honestly worth moving over to Android studio. I used eclipse until very recently and so many of these annoying little errors have been resolved.
Few things I used to do to fix this error:
Delete R class if it has been generated.
Make sure there is no errors in your xml.
Clean the project.
Make sure your build path is all correct.
restart eclipse
LAST RESORT: Make a new android project and copy over your code.
Hope this helps. Once again, really recommend AS.
Till you have problem in your "res" folder, R.java class could not be generated.
So try to resolve all problems (in xml files) before.
Try the following, until one of these results in success:
Look through your XML files for any errors and fix them.
Clean your project.
Restart Eclipse.
Clean again.
Create a new, clean workspace and import your existing project into it.
As for recreating the workspace – I have myself come across similar issues after messing with some internals, and recreating the workspace was the only way to fix it.
Related
So I have a project that works totally fine in one workspace on my machine. I push it to the repository so everyone else can work on it. I go to pull it down making sure all the changes are good. I import the project into a new workspace and using eclipse with autobuild on it produces no errors.
I go to the command line and run ant clean release on the project and right before it gets to run crunch on the assets the build fails with a mulitple dex files define error. Ive checked the project high and low and compared to the other copy of it in the original workspace but for what ever reason I cant get it to build. I erase the bin and gen folders and remove all the imports and basically leave just the project, run clean in eclipse, and still get a dex define error related to one of the lib projects classes. Ive tried to find where extra copies could be but I dont find anything.
googling around for the past few days hasnt helped as the normal solutions to such a problem havent worked for me. So what is the best way to figure out where the extra class definitions are coming from so I can get rid of them and fix the repository so I can use it correctly. I have a feeling its related to one of the files in the project that I should be excluding in my gitignore but Im not sure which that would be. Any help on the matter would be greatly appreciated cause this has eaten quite a bit of time of just messing around.
When you have more than one class with the same package name this error would raise.
One of the common source of this issue is when you have for example different version on the same library.
For example your add ActionbarSherlock which in 'libs forder has it's own support library and also your project has another version of support library in it's libs folder. In such a cases you should put one version of support library.jar to all different libraries that you using it.
I hope this could help you.
I didnt find the root of the problem but I figured out a fix. I moved all the support libraries to a new root folder completely away from the android project. Once I did that and cleaned everything I then ran ant clean release and the project built fine.
I'm trying to tinker with this project and am having some issues importing it.
https://github.com/HoloAddict/FeedEx
I'm a beginner still, and have made a couple of test projects from scratch, but I think I'd learn a little faster by going through working code in a larger project. Just can't get rid of errors to even build the existing code. These are the steps I have taken:
imported it in as a Git project (file - Import - Git - Projects from Git)
gen folder error (does not exist or not source) - right clicked on gen, Buld path - Use as a source folder. This made that particular error go away
all the src files were listed as src.net.fred... packages, so all the imports were errors. Right click - build path - configure build path - added Feedex/src in build path, got rid of those errors.
have the R.java problem... tried many clean-build approaches, no luck. Also tried taking one from a clean project, creating package net.fred.feedex in gen, creating file R.java, and putting code in from a clean project, but no luck. It did make the import R go away, but of course left many errors where the res class references are broken, again because that R file is missing (I think).
So that's where I am. It seems like I have an R.java problem, but I may have messed up on one of the other steps. Either way, thanks for the help.
When you imported the project did you check the "Copy projects into workspace"?
If not import your project again and see if this problem still continues.
I use Eclipse for android development and trying to use IntelliJ. I have successfully run the application once. But now, I couldn't seem to rebuild the example Hello World application. What am I missing here? The R.java is not rebuilding anymore. Here is a screenshot of the errors.
And here is my setting
This happened to me because I've marked source folders incorrectly.
Under project settings once you click on particular module, Just check whether you have Mark any additional folders as source folders.
Check the screenshot, By default it should be something like below, All mark as buttons should be unchecked
By mistake I've checked Mark as: "Source" button and I got this error. Just uncheck it.
R and BuildConfig are autogenerated by the android build system. Maybe you somehow copied an autogenerated version of your eclipse project into the idea project and then idea generated second ones. By default, idea will use a folder called gen for these files which is marked as a source folder. Make sure there are no other source folder containings these files.
You can quickly find classes by pressing Ctrl+N and starting to type the name of the class. If you find duplicate results, delete any of them and let idea regenerate the correct ones.
Unfortunately you may not like my answer, but my project is due yesterday and I don't have time to check every setting to fix the issue.
The way I resolved it is to re-create a new project, only copying the src, res, lib etc across. This was painfully difficult and presents other issues (manifest files and run/debug configs) , but proved relatively short as opposed to creating a new project ANYWAY and sifting through build options that may or may not be valid.
I encountered the problem while trying to add the KSOAP2 libs to the IDEA project, and although KSOAP has nothing to do with the problem, I may have imported them in the incorrect manner the first time and created extra self referential dependancies. This makes the most sense, but trying to figure out how to undo it would be next to impossible.
you can try to delete the r and buildconfig files from the com/x/x folder under android -> java
that fixed it for me.
I'm on Eclipse for hours now and I didn't found a solution yet for my problem even after many searches on internet: I have no more R.java file on my projects.
On just created or on my old projects, i don't have R file anymore and I tried so many solutions (uninstall, re-install Eclipse, clean my project, check all my XMLs, fix problem with android tool and so on ...)
Please someone can tell me what to do in this case?
Hey If you just updated to ADT Rev 22 :
I had the problem too. There is a new component in the Tools folder called "Android SDK Build-tools" that needs to be installed.
Step 1
Open the Android SDK Manager
Step 2
Select the newly added Build Tools and install. (If problem stays then go to Project Properties => Java Build Path => Order and Export and check Android Private Libraries, then clean and build project.
It may be necessary to repeat the process, restart the SDK Manager after the update and make sure it looks like this (all tools installed):
More info:https://groups.google.com/forum/?fromgroups=#!topic/android-developers/rCaeT3qckoE%5B1-25-false%5D
Perhaps in Project Properties -> Java Build Path -> Libraries you don't have:
Android 4.2.2 (or other version)
Android Dependencies ?
If so, then right click project - > Android tools -> fix android properties
and see if this library showed up.
Thank you all for saving me! I've spent the whole afternoon on search this error.
Finally, my project works.
By the way, I also encountered one problem which i wanna share with you:
After upgrading, even if my project has not errors anymore. During runtime, it seems it couldn't find the classes from the jars placed in \libs.
Go into Project=>properties => Java build path= > Order and Export.
Please make sure all your jars are checked.
If this problem occurs suddenly in a well working project,
the first step is to find whether the problem occurs only in the current project or in all other projects.
if all other projects in the current workspace are working then 90% problem is with XML / mainfestfile/resourse file that you edited recently.
This error is not shown as red mark we have to find out what we have done recently in these files.
try this
sudo apt-get install lib32stdc++6 lib32z1 lib32z1-dev
it solved my problem
Close your eclipse and after refreshing system, try to open Eclipse again. I think you are using Emulator along with the eclipse. It may be because of the low Memory problem (RAM) of your system. I used to face the same problem when I use Emulator
whenever there is any mistakes in any of the xmls the R goes missing when a build or clean happens so check for any xml errors in your project unless you fix it you cant get back your R on clean or build. fix the xml files and perform a clean you will have the R generated. Also check in File->properties->Builders and see if everything is checked
I was using Eclipse Indigo and nothing I tried worked. I ended up downloading Juno SR2, reinstalling the ADT, and now everything works again.
Reinstall everything and it'll work.. i.e. go back to Google SDK or w.e. you're using and download it.
Update it to latest in SDK Manager.
Go into Eclipse-Project-Prefs-Java build path-order/export TICK EVERYTHING.
problem: No R file get generated.
guess: Try cleaning project if it is old one. Else create new project with no R get generated and with no compile errors but this: no project.apk
In this case you have to check your SDK for the built-tools. May not be installed after updating SDK.
Thus download them if not download here, then put them under directory: SDK/built-tools folder. Lastly, and most important, is to Run the SDK As Administrator. This guarantees refreshing SDK with all packages appearing in it.
Install the SDK-Built-Tools or any missing packages according to the above link and you're done.
hope this helps.
Try one thing, create a new Android Project and transfer all those files which are in the previous project. That worked for me.
In my case there is error due to "&" inside strings.xml file(but error not shown) for declaring string for a array type. Now the problem has been solved as I changed "&" to "and".
So, please make sure that you do not have such silly use of symbols, and clean the project.
I have had the same kind of problem, however Rechecking all XML files in the Resources folder was helpful in my case. I found syntax error in my XML files. Cleaning and building the project again can be helpful sometimes too.
I had the dreaded not more R.java.
Some of the things I've used in the past:
Clean / rebuild (the first thing we all try)
Restart eclipse (optionally reboot pc/mac)
Update both SDK/ADT eclipse plugin to latest version
Create new eclipse workspace and import project
Enable Verbose AAPT build output Eclipse menu>Preferences>Android>Build
Port project to Android Studio / Gradle (this helped my actually see the AAPT error i was getting Error Code:138)
Delete recent XML changes - Ultimately I found deleting recent menu.xml files I'd added and commenting out where they were referenced fixed the issue and I finally got R.java.
I got the error recently and had found no fault in any layout or value file. After a lot of tries I add another Activity and the R.java was build and the error disappeared. I don't know why this occur, but it takes me hours.
My project has been running fine for weeks. I went to swap out an image today and suddenly eclipse highlighted my project saying it contained errors but did not point to any particular files. I then cleans the project and now it is bringing up the message
R cannot be resolved to a variable
The gen folder is empty and I have these errors now over all my src folder. Does anyone know what to do?
All help appreciated.
Your project has an error and can not build thats why Android compiler can not generate the R class and eclipse warns you about that class. Check out all problems in the problems view. Also check project runtime and library settings if there is anything missing. You might accidentaly delete a lib or java runtime might have been changed.
When I encounter this king of 'weird' issues with *.xml resources I add one more item. I case of strings.xml I add new item and that CTRL+S the project will be rebuild and the R class will be refreshed. This usually fix the problems, and afterwards I delete the item that I added.
There are a lot of times when eclipese doesn't rebuild until you add something new (that it , until you make a change in your resources)
I hope this will help you if not , it might help to someone else having similar problems
If you did not disable the built-in Source history in Eclipse (right click on a file in Explorer view, then select Replace With -> Local History), revert to the code prior to your change, and rebuild. If it builds, figure out what the change was and adjust accordingly.
If you don't have that history, try to remember from memory. Likely it can't build the R file because one of your XML resource file is incorrect or references the wrong file.