In every instance in all of my classes where I reference R.id.something, the R is in red and it says 'cannot resolve symbol R'. Also every time there is R.layout.something it is underlined in red and says 'cannot resolve method setContentView(?)'. The project always builds fine. It is annoying to see this all the time. I have read many other questions on here about something similar but most involved importing projects from Eclipse. I am using what I believe to be the most recent version of Android Studio and the project was created with Android Studio and worked without any 'cannot resolve R' problems. I would like to know what causes this if anyone knows.

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If you see this error after moving java files or directories to other locations, then you can guarantee that Android Studio has gotten confused. And guess what? Undo-ing those actions doesn't fix the problem. So you try a clean, but that doesn't work. And restarting doesn't work either. But try File -> Invalidate Caches / Restart. -> Invalidate and Restart Android Studio maintains information about which files are dependent on which other files.

And since moving files around is not implemented correctly, moving files causes errors. And that's not all: caches of these dependencies are used in an attempt to speed up the build. This means you not only have to restart, but you need to invalidate those caches to restore (or more accurately, rebuild) sanity. I recently had this issue and the clean/build etc.

Didn't resolve it. I guessed I had an issue somewhere but wasn't sure where to look to find it (was it in the manifest, resource xml files etc?).

When something is wrong, you can find out what it is by doing a code analysis run. From the menu at the top choose: Analyze -> Inspect code, scan the whole project using the 'Default' profile.

Your inspection results will contain an element called 'Android'. In here you will get a list of anything that is causing issues in your resources and manifest file. The errors will open up.

In this case I’m referencing Win7. It will by default look for $HOME/.Rprofile (C://Users/ME/My Documents/.Rprofile) if exists load it, else check for $R_HOME/etc/Rprofile.site etc. Only issue I had was creating the file, since you can’t in the Explorer (file can’t start with. Sillyness), but you can from R’s file.create and then edit via Notepad(++). I use Ubuntu and Mac too with the same user owned library setup. Ubuntu upgrade via apt-get upgrade and Mac via normal installer.

No need to migrate packages between versions. Hi Hans, o.k, several things: 1) The idea of using a global library folder (which you described), is indeed (in my view) a good one. In fact, that I wrote some code that will grantee it every time you upgrade your R system, please see: (it is based on the environment variable you mentioned in your next post) 2) I am not sure about using the (C://Users/ME/My Documents/.Rprofile) for this purpose. I can understand why it would work if you just start up R (since they always set the default working library to be my documents). Tricks for running fortnite on mac.

However, for someone who uses RStudio projects (where the default working directory is different every time), I suspect in this case the.Rprofile will not be loaded first (although it is worth checking to make sure). 3) Regarding Ubuntu and Mac, if you’d be interested in helping to extend the code to these OSs, feel free to e-mail me, and I’ll be happy to work this out with you.

With regards, Tal. Hi Eric, installr is modular and offers procedures for several steps: 1) checking for a new version of R 2) installing a new version 3) copying of packages from one folder to the other. The two later stages do require admin privileges. Also, the copying of packages assumes you wish to move them from the default library folder of the old R to the one of the new R. You can also only use the install.R() function and take care of the package folders on your own. Personally, I use the global library folder system (you can see more about this from this link: ) Does this help? With regards, Tal.

Design view visual studio for mac 2015. Hello, I consider an update from version 3.1.0 to 3.2.3, which will be released next week on December 10, 2015. Long time ago, I installed R, 64 bits only, in folder “C:/Code/R-310/”. System.PATH() detects it properly (for clarity, I replaced double anti-slashs by /): “C:/Code/Rtools/bin” “C:/Code/Rtools/gcc-4.6.3/bin” “C:/Code/R-310/bin/x64” “C:/Code/R-310/share/texmf/tex/latex” “C:/Program Files/MiKTeX29/miktex/bin/x64” “C:/MinGW/bin” “C:/MinGW/lib” Questions are: 1/ where updateR will install the new version 3.2.2?