I know this question is asked many times. But still that answers are not resolved my problem. My code shows an error "R cannot resolved to a variable in android". I cleaned and build automatically many times and also fix the project properties but the error still same. How can I resolve this error ?? please help me and thanks
look for the errors in res folder and resolve it first.
It can be an error in layout, drawable, values etc..
Check the last layout, drawable, values etc where you made changes prior to getting errors. You must have made an error there. It usually is using captial letters or - in drawables or import to "R" in your activity or some problems in xml like name match_parent to Match_parent etc. Here are some links with similar problems
Android Development- Where is my R.Java file?
R cannot be resolved - Android error
R cannot be resolved to a variable
R cannot be resolved to a variable -- mailing list entry
Fixed: R cannot be resolved to a variable
Try one of these.
1>Could be a problem in your xml
2>right click on the project->Android tools->Fix Project Properties (check if the build target is checked)
3>SDK update (Build tools would have not been downloaded) go to android sdk manager and download tools (to find out create a new project if it cannot resolve R then go ahead with this step.)
Hope this helps
Try to remove "import android.R ;" at the top of your code.
Related
I already cleaned the project , and set the automatic build after clean it up
but there are 50 errors regarding the 'R cannot be resolved to a variable'
how to fix this issues ? i really confused ...
Thanks before
This error is usually caused by either of these possibilities:
The most probable: You have a syntax error in any of your layout files (i.e., the files located under the res\layout folder of your project). The bad thing of this is that Eclipse won't warn you and tell you what's the error, so you'll have to go one by one looking for the syntax (probably an unmatched tag, an unmatched attribute, etc.) and fix the issue.
The other possibility is a syntax error within your AndroidManifest.xml file. Same goes here, check it for syntax errors.
One of these two will fix your issue.
I've had problems like that before, while importing a project to my workspace, I don't know if that's your case, but this answer helped me in those cases:
Android Eclipse - moving project caused all R reference errors
I get the following error in eclipse: r cannot be resolved. However that appeared just after I added my own library as a resource to my project. It seems that eclipse cannot resolve which R to use, the library one or the project one. Note also that the library is marked with the is library check box in the project set-up. Also whenever I remove my library from the reference list eclipse does not show any errors, but upon compiling logCat shows a Class Not Found exception. How do I fix this issue?
Thanks
R is an autogenerated class. If you clean the project, the error should dissapear.
R.java is not getting generated for your project which is done automatically, pls check whether something wrong with any XML file or check console if there is any problem in XML it will show you something related to XML or check something wrong with importing packages. If its not about any XML errors then check on importing that library project in your project. you may get some imports related to something like this: com.android.R then remove this if you see this and then manage imports again.
Newbie Alert: while working on my android application my program was acting kind of buggy so i went to project, and did "clean." i reimported my R but for some reason all my other classes and xml files are giving me errors "Cannot be Resolved or is not a Field"
i've restarted my eclipse and refreshed and im still getting these errors. Help please!
I come across this error often as well. Here's how to fix it:
Check your xml layout files for any errors. Fix any you find.
Delete all the "import" statements on the .java files that has all the "cannot be resolved or is not a field" errors.
Clean. (Project -> Clean...)
Re-import needed packages (Source -> Organize Imports) (Control + Shift + O). If a dialog pops up, choose carefully!
Save.
Basically you need to have < your package name >.R imported if you are using layout files.
If you have recently renamed a package, that could have caused this. Fix all the import statements so that they import the correct R, < your package name >.R
This has happened to me a lot as well. I found that it was usually a problem in one of my xml layout files such as missing a closing carrot or something like that. Just double check your xml's to make sure that you didn't forget something.
I had this problem too and i realized I have imported the wrong R.
Way to fix this,
Delete the already Imported R
Press Ctr + Shift + O and choose the R.
Save
Repeat the process and choose another R if it still has error.
I am doing an application in which I didnt changed anything and still it is giving me an error on R.java file that R cannot be resolved to a variable...
I have done all the things like: project->clean
close and open the project again
close the eclipse and restart it agagin but no solution...
I am not able to fix this problem....This problem is so much irritating....Can anyone pls help me in this case??
There is probably an error in one of your resource files, you need to properly check all your resources to find if any of them contain errors. The resource with an error will have an error red cross on its icon. Hope this helps.
Make sure there are no other errors that might cause this error, also look at this entry:
R cannot be resolved - Android error
If I make a new Android project in Ecplipse and I try, to open one of the samples from android SDK, I have got an error, look like this:
R cannot be resolved
What can I do, to be able, to run these files? I tried to delete import android.R; but nothing changed.
Thanks
First thing you might try is "clean" your project (option in the menu). If it persists:
There should be an error that stops R from being generated. Check the "problems" tab (?) in eclipse to see what that problem is, and solve that. It could be missing libs, or various other stuff.
You possibly got error in building resources.
Possible fixes:
-refresh your project (F5)
-clean you project and refresh
-see "Console" tab, sometimes the problem is shown there
-reload the Android SDK
-restart the Eclipse IDE
Check your XML-Layout files. The problem come here half a time.
If you are sure it is note your layout file, check in your java build path if the google librarys are well set. (Google APIs)
(sorry for my bad english)