This question already has answers here:
R cannot be resolved - Android error
(108 answers)
Closed 7 years ago.
I was working on my project when suddenly the project showed an error in every java file where I used the find view by id method. Then it showed a Red line under "R". import R.java then again an error under layout id and layout name.
I have created a new project but it still shows the same error in the main_Activity.java file.
Please help me to resolve this problem.
You have not followed naming conventions properly for any view in xml files, layout file name, drawable name or same key in any values file. Whatever error is ... most likely its in res folder not in your code.
Even if it is not showing any error in res folder, it is still there !
Even if you can't solve the error, add your xml files , their names, drawable name, any one could else point out error for you.
Though it is just a small thing , I have seen 99% freshers stuck into it.
By name of your class "main_Activity.java", you certainly not in remaining 1% !!
Follow naming conventions ALWAYS !
And here are godzillion answers ... R cannot be resolved - Android error
You haven't added in code so abstractly try these:
Check AndroidManifest.xml for any errors.
Project - Clean - Clean Project.
Add appcompat_v7 library. This is an Android Support Library.
Related
This question already has answers here:
Problem with IntelliJ -> Cannot create class with name "Main"
(2 answers)
Closed 2 years ago.
I cannot create java class file with name TokenProperties.java. I also tried restart and clean cache but doesn't help. Class with different name I can crate.
Here is error pop-up.
File will added but marked as plain text file, and no java file.
Do you have idea whats is going on? Thank you.
It kind of looks like you create a TXT file with the name TokenProperties.java when you want to create a JAVA file with the name TokenProperties similar to how DemoAAplication was created.
Right click com.example.demoa package.
Select New
Select Java Class
I wasn't able to fix it so I reinstalled Intellij and now it works.
This question already has answers here:
R cannot be resolved - Android error
(108 answers)
Closed 9 years ago.
I cleaned my project and now I get a "R cannot be resolved to a variable." It was fine before I cleaned it.
I have tried cleaning it again, building the project again, creating a new project and copying all my files over, and I've gone to the Android SDK Manager and installed all the "Android SDK Build-tools" to Install all the options like the other stackoverflow posts have mentioned:
Can anyone suggest anything?
The above picture shows my generated files and lack of an R.java file.
The above picture shows my problems log.
Make sure R is in the same package as the file where you want to call it from.
(or import the package in the source file)
To change the package of the R file open your App Manifest file and change packge="" to the same package as where your source files are in.
maybe you import take other thing
See package main import in your code
should be like this
example:
import com.mypackageprincipal.R;
other import of R delete only should exist it
and after clean and build your project
I need to start an activity in my titanium module.Then I have to setContent of my Layout in my pure java code, But I cannot locate the layout file in Titanium module.
I used below code but i get error that file not found.
int id = TiRHelper.getApplicationResource("layout.activity_main");
If i put my layout files inside "platform/android/res" i get error,any idea to help me?
invalid resource directory name:
[ERROR] Error generating R.java from manifest
Regards
Might have nothing to do with it but I once ran across this problem and solved by putting the application id in the com.company.app format
If your XML's contain errors your generated file might not build try erasing most of their content and making sure id's and file names are not duplicated and no capitals and spaces are used. If it works you can start adding stuff.
(or)
You're importing invalid R class I Think,
import yourpackage.R class
for example
com.example.R
what actully happends that u import android.R class not yourpackages.R
I am trying to build my Android project in Eclipse and this error is popping up in my console:
W/ResourceType( 265): Unknown XML block: header type 0 in node at 413
This is causing my R.java to not generate. I have absolutely no idea what this means. It's not even telling me which file is causing the error. This is quite a large project with many XML files and I've looked through every single one and they all seem to be okay. Can anyone shed some light on this?
Any help would be greatly appreciated.
R.java includes all Ids, layouts.. If there is any problem like formating error in id name or any other error of layout. then R.java file will not be generated & your java class file will show you error. so first check your xml file
There might be the possibility that you have put your xml file in the wrong folder under res dir. Like if you are trying to access <wallpaper> tag in Android xml file you must put it in res/xml directory otherwise it will show error.
You can try following options::
close other projects.
clean your project.
check in the source files(java classes), if there import android.R.* is present , remove that.
check in your res folder, if it is showing error in any folders like drawable, layout, values.
5.correct if you get errors.
R.java is not coming because it is not getting id of any/more resource/resources.
this will solve your problem. thanks
Your error may come from incorrect line ending. You should check this Link. Hope this help.
This question already has answers here:
"R cannot be resolved to a variable"? [duplicate]
(30 answers)
Closed 2 years ago.
I cannot fix:
"R cannot be resolved to a variable"
I have tried cleaning, building, I have deleted and made sure that any "java.R" imports are missing or whatever but I STILL cannot seem to squash the bugger!
Any reference to id's or layouts don't work and it just feeds back an error.
Do any of the files in your resource folders have capital letters in them? Capital letters aren't allowed.
This hung me up once....
Try the following things:
Make sure none of the XML files (menus, layouts, etc.) has any errors. Those prevent the R fropm being genreated
Delete the project from eclipse and import it again
Look for Android meta data files (i think those are in a .android folder) and delete those
hth..
Try the below steps to resolve the issue,It worked for me:
Cleaning the project and then building it again. Closing project and
then opening it again.
Closing project and then opening it again.
Going to Project Properties > Java Build Path > Tick Android Version Checkbox
ensure no errors in XML files,Because errors in xml file Prevents the R.jave file to be created.
try downloading the latest version of android SDK,if available.