“R cannot be resolved to a variable”? [duplicate]

Answer 1

I got this error when I added a js file to the res folder.

An error indicator was set on the res folder icon. In all the classes where I used R I got this error.

I moved the js file to the assets folder and everything worked.

Answer 2

For me, there was a missing slash at the end of my SDK. In Eclipse > Preferences > Android > SDK Location

For example, change

/home/matt/android-sdk-linux

to

/home/matt/android-sdk-linux/

Answer 3

Try to modify AndroidManifest file.

For example add space and delete this space. After this OPERATION, save project. Resources will be refreshed. It can help.

Answer 4

My setup was broken after a recent update where the SDK build tools need to be installed separately after the SDK installation. So build tools update + Eclipse restart fixed this for me.

Credit goes to the Android reply here

Answer 5

Check the androidmanifest.xml file and layoutfolder xml files. They should be created properly as the starting and ending clause in xml should be placed properly. Update the files, clean and build. And all set!

Answer 6

I know this is an old question but I just solved my own version of it and perhaps this might help someone.

After two days of tearing my hair out with this, I finally got around it by deleting the raw folder, then recreating it and dropping the file(s) back in.

After that, another Project > Clean and it at last compiled.