I'm creating a clean project on ADT and I noticed that the gen folder is empty (with no R.java in it), not letting me run the project. I'm running ADT with all stuff up-to-date (as you can see here)
I already cleaned and built it in every possible way. I also tried to reimport the project, and nothing. There are no errors in the XML files.
I searched for a solution and I found a lot of people with the same problem, and in most cases the solution was to update the SDK tools, but it didn't work for me.
Is there a reason for this?
at the top of screen, click build -> rebuild project
Give it a few seconds. it worked for me, i hope it save you aswell
im using Android Studio(beta) 0.8.9
My R disappeared after i fiddled with sound files in my res/raw directory(converted them to different formats, figuring out how SoundPool class works...and suddenly there is red "R"'s everywhere!
Try right clicking on the project, then going to Android Tools > Fix Project Properties.
If that doesn't work, then try cleaning it before and possibly after that.
If R.java disappears, you usually have to recreate the project from scratch again.
There are many reasons for R.java missing issue, i use to face this issue frequently, some of my thoughts to debug this issue.
Try creating another test project using File->New->Project->Android->Android Application Project. After creating the project run the project in emulator. If every thing works then your setup is perfect.
Check your imports section of your java files, some times default R.java gets included which is from android package. In this case Remove that import and add correct import statement.
Check your "res" folder all the xml's should be well formed and valid.
Hope these debugging steps may help to find the root cause.
try deleting the r.java file in gen folder. when you run again after cleaning and building the project. It should recreate those files and it should work after that. Try that.
Other wise you might have to reinstall Eclipse as you have tried in so many different projects
Something I just noticed was that after I removed the auto-generated code for the menus (which I wasn't using) it started causing errors. Eventually when I cleaned with the menu xml's still in the file structure, my R file disappeared. I removed all entries in the menu folder and then cleaned again. This worked for my specific instance. Hope this helps others as well.
Related
I'm brand new to Eclipse for Android Developers (Eclipse Neon in Ubuntu), and upon creating my first project, I was flooded with errors. It appears that the source of the errors was that the R.java file was never generated.
I've attempted to clean the project and restore from local history (nothing was ever deleted so this accomplished nothing). I've been unable to find a solution to my R.java file never existing in the first place, and help would be very much appreciated.
The Main Reason behind R.java File not generated is :-
First of all i think that is the Problem of your XML file.if you Leave any Mistakes/Errors on your XML file.
Then Eclipse/Android Studio will never generate an R.java.
That is the Solution of your Problem.
Hope this help to generate your File..(:
Try to create project Again (Delete it and create New)
Either your Eclipse is not installed properly.
Any file is missing in Eclipse (While installing it, Antivirus removes some important files, So install Re-install Eclipse keeping your antivirus paused.
I have recently started modding in Minecraft 1.8, with Eclipse. I created a test mod, and it worked perfectly. Then I decided to start a new mod from scratch.
Almost immediately, I got an error by my imports.
I tried pressing Ctrl+Shift+O, to organize my imports, and it just deleted them, because they couldn't be resolved. I tried going back to my previous project, and the imports weren't working there either.
After some playing around, I realized that other imports were working.
Only net.minecraftforge imports weren't working.
I am extremely confused as to why this is happening. If you need me to upload my code, I will gladly do so. I greatly appreciate your help in advance. Thank you.
When something goes askew with Eclipse when modding it's important to first check if the workspace is still good.
Sometimes for whatever reason a jar can get corrupted, deleted, locked by virusscanner, aliens kidnap it...
reason why isn't important unless you are into such a thing, but if you are solution minded first try to reset your workspace.
By running gradlew setupDecompWorkspace eclipse you redownload the stuff, re-decompile the jars and re-setup all the workspace items eclipse needs.
If your problem isn't solved after that you have a more serious issue.
Then I suggest you start really afresh.
Redownload the forge src from http://files.minecraftforge.net, extract it to a new directory and then run gradlew setupDecompWorkspace eclipse in that directory.
Then copy over your source files and see if the issue is resolved.
Then slowly add your dependencies/external jars.
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.
That topic might have sounded a little silly, so forgive that, but here's what's happening:
I have several folder in my Package Explorer that contain several projects I've been working on.
The problem is that Eclipse seems to not find my projects within my folder.
Those folder-like icons are suppose to be double-clickable to reveal my projects...
But after I closed up last time, they won't show up again.
None of them!
And they're all there. In the Workspace I've always used. All the files, all the folders, all the everything.
Why can't Eclipse find them?
I've tried creating a new Workspace, as well as importing the old projects over again, but then I got the error that these projects already exist.
I've restarted Eclipse, restarted my computer and anything else I can think of restarting.
The biggest issue I have is that now I can't access any of my work, and thus can't keep working on it!
Could anyone be kind enough to take a stab at how I should go about fixing this?
Please, be gentle. I'm a little green to all this.
You can go into arcives in the top-left corner and click on projects to see if it's the correct project folder.
Another thing you can do is to check if the project-files are still in the folder where you have your workspace. If they are there it can help to create a "new" project with the same name and all the files will automaticlly be in the project again. :)
I've checked every site I can find for the last two days and read more that I could imagine it would take to fix this.
I had an app half made and then I couldn't get java to see a layout I had made. I hit clean like I had on many other things. Then R.java disappeared.
I deleted the layout just to be sure it wasn't the cause. R.java did not come back.
I then decided to rebuild from the previous project. About a quarter of the way through the same thing happens.
Now, half the time I start a new project R.java isn't there to begin with. And when it is there it doesn't update at all.
I have made sure to update to the newest software. I've tried "Build Project" I've tried restarting eclipse.
I have tried saving my R.java file and then when it auto deletes I replace it with the recent save. I get aapt.exe has experienced a problem and needs to close" which also happens when I try to clean the old projects to fix them.
This is wrecking my coding.
I often have problems with the R file as well. Here are some things you can try:
Delete R.java and see if it regenerates (make sure Auto build is turn on)
Turn off auto build and manually compile the project
Go to your hidden .android folder and delete debug_keystore, then restart Eclipse and rebuild. May need to restart the computer as well.
Completely uninstall and reinstall Eclipse
Then there's the other suggested answers... check your XML files for errors, make sure your classes import the correct R file instead of android.R, etc.
Do you get any specific error messages in the console?
This happens for ALL your projects?
On eclipse package explorer menu (left menu that your projects are listed) right click, select android tools,select fix project properties,
if it works, let everyone know so other people can benefit.
Check if you accidentally imported android.R, this can cause problems also. See answer from Lars here: Missing R.java file even though project cleaned