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

Answer 1

I had this problem and none of the other guides helped, and then I realized I didn't have the java jdk installed on my system. If you haven't done this either go download the version corresponding to the version of eclipse you installed (x86 or x64)

Answer 2

Problem was eclipse was not generating R.java. To resolve this issue please go to project->clean... and select your project and select ok and then clean and build project and import your package name R file(Ex com.demo.R). It works.

Answer 3

For me the error got fixed by making some changes in Android SDK Manager.
Whatever be the latest API level available, install its "SDK Platform". For me latest API level available was 16, so I installed its's SDK Platform as shown in the image below. It works fine now.

Cheers, Mayank

Answer 4

It is possible you have an error in your *.xml files: layouts and etc.

Answer 5

I solved the problem with resolving R resource on fc19.x86_64 and ADT v22.0.5-757759 by installing additional libraries after Fedora and ADT upgrade.

yum install ld-linux.so.2
yum install libstdc++.so.6
yum install libz.so.1

Those libraries are required by adb (Android Debug Bridge version 1.0.31).

Then restart Eclipse and perform project clean Project->Clean check project you would like to clean.

Hope it helps :)

Answer 6

This can happen when the android naming convention isn't followed. Check if you have placed a file/photo into one of the android folders and make sure that the file name contains only lower case letters