as stated in the title. I can not get Eclipse to generate an R.java file. It fails immediately after the creation of the project. I have read around and fixes have been stated as such:
Clean Project
fix android project
make sure all res/ files are lower case
make sure xml files are clean and no errors
make sure Build Tools is installed
Well I have tried everything for 3 days now and i can't get anything to work. I have even gone as far as marking every file in my android-sdk as "executable". Nothing works for me. Mind you I have never had this problem on my windows 7 machine. I am fairly new to android development.
I have attached images. First one is a screen shot showing that I do have all build tools and up Second is a Screen shot showing the errors and directory tree within my project. As you can see the only errors output are those that point to R.Java File
edit: I can't upload images so I have provided links to the screenshots within my Google Drive
https://drive.google.com/folderview?id=0B73rHBl5RuotOTUtQURfUTdveW8&usp=sharing
This looks like a duplicate for this one:
"R cannot be resolved to a variable"?
It has been extensively responded.
My computer crashed (Got the blue screen of death).
After that I was unable to open my project again, however, it's files were still present.
So I opened a new project and created all the files again and then copied the content inside.
Everything went well except for errors in all of my java files: "R cannot be resolved to a variable".
Additional info:
My Android SDK Build-tools are installed
The new project I created has the same name exactly, except for an aditional char "3" at the end of it [example: test3 instead of test],
and I editted the menifest file properly and also every java file to
contain the propper package name.
My R.java file is present [I'm using Eclipse, Windows7]
Would very appreciate help in solving this.
It is a quite common issue when using Eclipse for Android development but for some reasons, Eclipse isn't exit properly; re-opening the project will see the error logs of R.java ....
I suggest to remove the project from workspace (don't delete local files), copy your project source code to another directory. From Eclipse, File -> Open Existing Android Project, find the project source directory to re-add into workspace. Update the SDK version and dependencies. Usually, it should be fine at this step.
For experienced developers, I guess you know how to check file lock (#ChuongPham mentioned in comment above) and check for wrong resources references in projects manually...
This question already has answers here:
Class not found error after updating ADT and Android sdk tools to latest ver 22
(1 answer)
Eclipse giving error, missing R.java file after recent update
(14 answers)
Closed 9 years ago.
I update my android tools and also my ADT. I cleaned my project and build it again. However after this action my /gen folder is empty.
I have made sure that none of my resource contains errors and also made sure that there is no import.R in my activity. I tried cleaning and rebuilding other projects as well with same error. I created a new android project and even the new project had and empty /gen folder.
Solved:
After the update you need to restart the SDK manager and download android build tools. After i clean my projects everything is fine again. Thank you guys.
Yesterday I had the same problem.
That's what I did:
Upgrade Android Development Tools to v.22
How?
Tab Help -> Install new SW using this site: https://dl-ssl.google.com/android/eclipse
Are you referencing the correct android SDK location, and do you have the necessary platforms/api level that you are referencing in your project?
Did you try moving project folders to a different location, e.g. to your documents or another drive?
The errors with the build path can be fixed by clicking Android Tools->Fix Project Properties
EDIT :
1) Make sure you don't have any other errors other than the R-related errors. Right-click your project folder in Eclipse, Android Tools -> Fix Project Properties.
do this
2) Check to make sure you have the correct R imported. Sometimes the default Android.R can be imported.
3) Check for errors in your layout XML files.
check in your sdk manager whether the android platform tools is installed , check whether the api you are targetting is installed and also in eclipse File-properties-builders check if everthing is selected. if all this is fine then if you have not restated your system after update then restart it.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Developing for Android in Eclipse: R.java not generating
Im using Ubuntu 12.04 with Eclipse Indigo (I downloaded classic, and it poped up with that on the splash screen, so I guess thats it). I am trying to use the Android SDK with it. I downloaded all the SDK's possible from the interface, then added the Eclipse plugin. I created a project to mess around with Android stuff, and there are two errors. One error I fixed. The other was something like, "R.java does not exist". I Googled it, and found other Stack Overflow questions similar to this one. I made a new one, because all the answers to the other questions didnt work. I tried cleaning my workspace and my project, I tried reinstalling the plugin and the SDK. Nothing worked. Is there anything Im missing to have Eclipse generate R.java? I am also using the 32-bit version of Ubuntu, if that makes a differece.
You failed to actually include any code in your question, so we cannot help to verify whether or not it is correct.
Assuming your Java code is correct, most likely your cause is an error in a resource or your AndroidManifest.xml file that is preventing R.java from being regenerated. To figure out what is going on:
Look for red X marks in the Package Explorer for resources or the manifest
Look in the Console for error messages
Look in the Problems view for error messages
Try the following to see if it helps
right click on the project
select Android tools
select Fix Project Properties
This question already has answers here:
Developing for Android in Eclipse: R.java not regenerating
(64 answers)
Closed 9 years ago.
Did a fresh install of Eclipse, JDK and android-sdk.
I am currently receiving this error when creating a new project
[2010-09-26 16:07:56 - Test] ERROR: Unable to open class file C:\workspace\Test\gen\com\example\test\R.java: No such file or directory
What's the reason for this and how do I fix it?
Eclipse Helios 32 bit
java version "1.6.0_21"
Android sdk API 8
P.S. I'm new to Android development.
EDIT: I tried most of your solutions, but nothing worked. So I started using my friend's install of Eclipse Ganymede.
I have had same issue, all what I needed to do, was create project and restart eclipse.
//Edit: Complete collapsing of "Package" tree works as well.
This is a mighty annoying error.
It happens 100% of the time when I create a new android project.
What seems to work for me is to just delete the file (which DOES exist and is accessible by my user), then hit build, and it will regenerate it and stop moaning.
It's clearly a bug as there are too many people getting it simply by filling in the boxes in the new project dialog (like me) without even modifying any code!
Have a look at your console. It is an aapt aborted error. Since aapt is the tool that auto-generates R.java, therefore, R.java was not getting generated.
Since R.java is a auto-generated file that stores information about your drawables you should rebuild your project. Before that have a look at your layout xml files and check them for errors.
Notice that Project -> Build All should be selected. Also try to run your project.
Removing Read Only attribute on Eclipse workspace directory and Project->Clean->Build Project
did the trick for me. I then clicked on the project directory from within Eclipse and did a F5 (Refresh) . R.java was generated in the gen folder.
I had a similar error on the creation of new projects myself. After messing around I tried moving the R.Java file into the same location as my projects java file (the src file). Eclipse then saw I removed the R.Java file from its location and created another and that seemed to clean up the error.....I dont know if it was because eclipse rebuilt the file and then saw it or what but that seemed to work for now.
After creating the Project, Right click the Project Folder within the Project Explorer on the Left Tab of Eclipse.
Click on Source->Format.
The Console will say:
[2010-11-24 11:57:42 - YourProject] R.java was modified manually! Reverting to generated version!
Then you're good to go. Try running your Project and it will compile.
Check your imports. If this has sneaked in, then delete it.
import android.R;
Had a almost identical issue with Eclipse Helios 64 bit on Linux, but I had the "1.6.0" API selected like you. The bizarre thing was I could type;
cat <the path it was moaning about>
in a console it would display correctly.
I created a new AVD which used Android 2.1, the issue magically vanished. Perhaps it's a bug in Android SDK or Eclipse?
Right click on your project name in package explorer. Then click 'Validate'. It will be fine.
Here is how to fix it:
Go to your "workspace" folder and make sure it's not "read-only"
Eclipse Menu > Projects > clean
Had the same issue.I was able to solve it by doing the following:
go to Window/Preferences/Java/Build Path
select 'Folders' and change the output folder to 'gen' (this is where Android looks for the generated java files,but the default in eclipse is 'bin').
restart Eclipse
Windows 7,Eclipse 3.5.2
Configure buildpath.. check android , it worked, of course i followed one of the posts mentioned above window, preferences, java, java build path and selected project,
then created a project, and tried to build same error, then i checked build path and saw android is unchecked, checked it and build again, it works!
I had this exact same problem with no helpful errors. finally, I tried deleting my debug keystore and it worked:
rm ~/.android/debug.keystore
I had seen people mention that, but I figured it wasn't my problem because I wasn't getting any errors relating to the debug keystore. I found the answer here:
"Debug certificate expired" error in Eclipse Android plugins
apparently the debug keystore is only valid for one year.
I would say that once you have created your project and you've mention the R.class error --> just restart the Eclipse IDE and everything will be fine ;)
1.-Open Eclipse
2.-Open Window/Preference
3.-Expand JAVA option
4.-Select Build Path
5.-Check the option "Projec"t and uncheck "folder" options
6.-Click on OK
7.-Restart eclipse IDE
Let's go to code !!
This problem can be solved by merely cleaning and rebuilding the project. How ever there is a link to the latest version of Eclipse for Android.
**Eclipse Java EE IDE for Web Developers.
Build id: 20100218-1602
(c) Copyright Eclipse contributors and others 2005, 2009. All rights reserved.
Visit http://www.eclipse.org/webtools**
Here is a link to Android Tutorial with Eclipse
http://developer.android.com/resources/tutorials/hello-world.html
In mac,
I select Project>Clean
after that, i unchecked Build Automatically
then i run the project and it works :)
Windows 7 64bit, run eclipse as administrator, solved the problem for me.
In my case there was no gen folder after pressing clear...
To solve it, i created a new gen file, then when to Build Path => Configure Path, and pressed ok.
All went smooth after that :-)
Following steps are done as solutions:
1. Collapse the project tree structure
2. Go to the workspace and remove the readonly permission of the workspace.
3. right click "default.properties" and go to properties and uncheck the readonly permission in eclipse.( this is done when the workspace shows build error even though there are no compilation issues)