Java/Eclipse - No more R file ever

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 propertiesand 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.