no R.java in gen folder - android

Question

I know there are a lot of questions similar to this one. But I have tried the solutions and none are working. I thought one of the following should work: 1. Getting rid of 'import android.R' line. 2. Cleaning the project and then building it again.

Still I have the same old "R cannot be resolved to a variable" problem. The gen folder is empty.

is there any error in project or any error in Problems view (Windows->vies->Problems) — Dheeresh Singh, May 14 '12 at 12:03

score 6 · Answer 1 · edited May 23 '17 at 12:33

6

I've had a similar issue some days ago. My R.java was not regenerated after I cleaned my project. Here is what fixed it for me: It seems like as of SDK version 22, which I had recently downloaded, there is an additional package you have to download from the SDK manager called "Android SDK build-tools". Without this package, Eclipse will not generate R. I installed it, restarted Eclipse and everything was working again. I had found the solution on StackOverflow: https://stackoverflow.com/a/16643060/1691231

edited May 23 '17 at 12:33

Community

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answered Jun 17 '13 at 13:00

Shah

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you saved my life, i just started to get too angry – keybee Nov 09 '14 at 12:40

score 4 · Accepted Answer · edited Dec 18 '12 at 15:50

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This usually means that you have a problem with one of your resources so R cannot be generated. Check the layout XMLs and see if one of them have a warning / error.

After removing the error please clean the project Project->clean

edited Dec 18 '12 at 15:50

Jitendra

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answered May 14 '12 at 12:01

MByD

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There was a small error in one of the xml files. I corrected it and now there is R.java in gen folder. But the error is still there. – user1357350 May 14 '12 at 12:10
What do you mean the error is still there? have you tried clean / rebuild after you fixed the error? – MByD May 14 '12 at 12:14
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Got it fixed! There was a small change in the package name in the manifest file. It was not flagged as an eror, so I missed it. After I fixed that, done the clean/build, it worked. Thanx for ur help. – user1357350 May 14 '12 at 12:42

score 2 · Answer 3 · answered May 14 '12 at 12:06

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This may occur because of your project has errors, Please try to clear the errors, remove 'import android.R' line and Clean and build the Project.

answered May 14 '12 at 12:06

Ponmalar

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score 0 · Answer 4 · answered May 14 '12 at 12:05

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Try this:

at first fix your layout errors.

then go to menu project-> clean and select your project

answered May 14 '12 at 12:05

Bob

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score 0 · Answer 5 · answered May 15 '12 at 07:08

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This also generally means something wrong with the build process...Have a look at the libraries tab under Java Build Path option in project properties dialog.....

answered May 15 '12 at 07:08

Kunal Shah

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score 0 · Answer 6 · answered Dec 18 '12 at 15:22

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Check your XML resources (especially these recently edited) for mistakes and sytax errors. When you have an error inside one of these files, the R class autogeneration will abort.

answered Dec 18 '12 at 15:22

Devendar

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no R.java in gen folder - android

6 Answers6