I recently added "recyclerview" dependency in my project and synced it.After syncing i found my R.java file missing. Now android is not showing support for R statements in the project.Please tell me how to fix this.
Sometimes, do a "clean" on your project will also fix this.
Eclipse: Project -> Clean, then rebuild your project
Android Studio: Build-> Clean, then Build -> Rebuild Project
Well Relax here is a Trick
Comment Every-line in .java File where your Using R reference,then Build your Project,It Will Rebuild R File,Now Uncomment then and you're good to go
i just copies the R file from another project.
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My project was running properly.I just gave a Lint check and it gave me errors from all projects. So I just cleaned my project. But now its not generating R.java file. How can I recover it. I tried building..But its not working
Try to check you resource folder(res/), it is containing error, Fix all error in res/ folder. then clean up your workspace. and build the project again, it will works.
R.java is automatically regenerated for you as soon as your res/ is corrected.
My answer is assuming that you are using Eclipse. Cleaning a project deletes its bin and gen folders and rebuild them again. Don't clean while having errors in the project as it won't build R.java on cleaning. It will show a lot of R errors in project as R.java is no longer present. But it will be showing the actual error in the console window. Fix it and R will build automatically.
First you check Your *.XML files if there is any error If error then first solve it.
Remove all import android.R from your activity
Run Project->Clean it remove all auto generated files
Build project using Project - Build Project it rebuild your project OR Checked Auto Build ON
Wait for a while it regenerate all files including R.java
If steel R.java is not generate then it is problems related to Project Build Target
Right click Project Go Properties->Android see in right section Project Build Target and see it match with your AndroidManifest.XML
Make change accordingly and repeat above steps
This one help you..
I am creating new Android application in my Eclipse.Application is created but the R.java file is not creating,I am getting errors R cannot be resolved.
IS there any issue in my android-sdk?
Thanks
Try Clean and Build
if it does not work please close the eclipse and open it again
It should work.
You can try following things.
1)in project tab(topbar) there is clean option try that, if your code is fine it will regenerate R.java file
2)if you imported import android.R.* statements, remove it, You should add your.project.name.R.* instead;
3) there may be errors in your xml files, check error viewer it should show errors there.
Check this. have you imported import android.R;in your project. If have means remove this import android.R;. clean and Rebuild your project
import android.R;
No generated R.java file in my project.
R.Java not generated.
R.java file not getting generated.
When you clean and build your project R.java gets generates automatically. Try the above links.
There are 2 ways to solve this problem:
1) In Project Explorer, Right Click on your Project, then go to Build
Project
2)in project tab Go to clean option, if your code is fine it will regenerate R.java file
Clean your project and try again it will help u
From Eclipse Menu Bar;
Enable Project -> Built -> Built Automatically
After importing the project file disappeared R.java I tried Project - Clean, nothing ...
Yes, if you've any errors on your *.xml files. The R.java file will not generate. Try to clear that errors first. After, clean your project and try to run.
Hope it helps you.
Go to Project and hit Clean. This should, among others, regenerate your R.java file.
OR there might be any error in one of XML files.
//once you import your project. your library jar files wont get import it seems.
try to put that libs in project from C:/user/musanin/ and D:/java/work_Max
Clear all errors from the "res" folder and clean. It will generate your R.java file.
That implies errors on the layout or Manifest file , which are XML . Fix them first and clean the project
Without Removing the error present in .xml file your R would not appear..Open your .xml file and see what the errors are..If they are false error then just format the .xml file [ctrl+shift+f this will format your file] and save it. Then Clean your project and buil it again..You will get your R.java back.. :-)
Rectify the errors in the xml files and after that do
1) clean the project (or)
2) Restart the eclipse
I lost the R files once importing the project. The reason was target SDK conflict (in .manifest file) between appcompat library and my project (my project had 19 whereas appcompat was 21).
Change the project's android:targetSdkVersion into that of appcompat library project.
Clean the project.
And you should be good to go.
When i run my project its give me below error.
Compile Error: Error generating final archive: java.io.FileNotFoundException: ..\bin\resources.ap_ does not exist.
I tried to clean my project but also it can not generate the resource.ap_ file and my apk file size is 0..
please help me to solve this problem...
Quite often problems like this can be solved by deleting the project from your eclipse workspace (NOT deleting the project files) then importing the project back into the workspace. Give it a try...
Usually the following steps work:
ADT -> Project -> Clean
When I changed some design in .xml file, R.java file automatically deleted. How can I get back that file and what is the solution to resolve this problem, that in future this problem does not occure.
check all your errors in xml files structure (layouts, string etc...) even if sometimes they are not easy to spot.
My advice is to undo the latest things you've done until you find where the errors were and fix them.
Once they are all fixed the R file will be created again (maybe you need to clean your project: project -> clean)
In the future just try not to break the xml files and this won't occur again xD
You can also disable automatic build in your Eclipse IDE(Menu -> project- > Uncheck build automatically). This way the R file will be recreated only when you manually build the project and not when you save changes in an xml file.
Fix your errors and the R.java file will return...e.g when i added an image in my resources folder its name was in uppercase....when i changed it to lowercase,immediately after doing it my R.java file returned...its all due to errors...just fix them and it will return
I agree with #maid450.
I also have faced similar situations.
If your problem isn't resolved after all this, ultimate option is to create a new project, and copy files to it.
one solution is that Go to Eclipse project tab -> uncheck Build Automatically -> Clean the project.Make sure that there is no error in your project also don't try to edit the R.java file one it will created. Then manually build the project. you will get the r.java file.
The best solution for Mac/Eclipse user is to go to the SDK Manager and re-install the Android SDK Build-tools, and then restart Eclipse.
For some reason after performing a Clean action on a project the R.java file for all projects happens to be deleted from the system.
Clean the project.
Menu [Project] -> [Clean...] -> Select you project -> [OK]
Project will rebuild automatically, if not, chek
Menu [Project] ->[Build Automatically]
The R file deleted automatically when I changed my activity_main.xml in Android Studio.
What I did was copy the R java file from another project and paste it into the project in which it got deleted.
Hope it helps. :).
Location for R file.
Project/app/build/generated/source/r/debug/com.android.'projectname'/R.java
Where is the R.java file in Android Studio?