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
Related
I'm trying to use this library called OpenSimplexNoise, made by GitHub user TheCodingTrain. But I immediately discovered that I couldn't use it.
I did some digging to try to figure this out on my own, and I discovered that the JAR file and the main folder should have the same name (for example, the library file would be named OpenSimplexName and the JAR file would be OpenSimplexNoise.jar), and the folder the JAR file is in should be called "library." Once I fixed these issues, OpenSimplexNoise appeared in the "Import Library" menu in the "Contributed" section. But once I clicked it, a bunch of code appears:
import japplemenubar.*;
import processing.awt.*;
import processing.core.*;
import processing.data.*;
import processing.event.*;
import processing.javafx.*;
import processing.opengl.*;
along with the error message:
More than one library is competing for this sketch.
The import japplemenubar points to multiple libraries:
core (C:\Program Files\Processing\processing.3.5.4\core)
OpenSimplexNoise (C:\Users**\Documents\Processing\libraries\OpenSimplexNoise).
Extra libraries need to be removed before this sketch can be used."
I tried removing japplemenubar, but the same issue appeared with processing.awt, so I tried removing that, but it just kept happening with each different import. I tried deleting it all and just typing "import processing.OpenSimplexNoise.*;", but it said "The import processing.OpenSimplesNoise cannot be resolved."
Does this mean that I'm just doing something wrong, or is this library no longer usable?
I recommend watching/following the videos linked in the README and understanding those:
https://youtu.be/pI2gvl9sdtE
https://youtu.be/U0TGZCEWn8g
The tutorials are how to put organize/compile a basic Processing library from scratch, not how to use library itself.
It would've been easier if a distribution zip would have been uploaded, but the point is learn how to generate it.
Downloading the library zip and unzipping in Processing won't work.
You need to:
(install eclipse if you haven't done so already as part of the video tutorial)
clone / download the project on your computer
Import the project into eclipse:
Drag and drop the build.xml file into the Ant panel: (in my view I've got multiple Processing libraries, you might have just OpenSimplexNoise)
Press the green Play Icon to run the build.
Initially I ran into this error:
BUILD FAILED
/Users/George/Documents/eclipse/OpenSimplexNoise-for-Processing/resources/build.xml:107: The following error occurred while executing this line:
/Users/George/Documents/eclipse/OpenSimplexNoise-for-Processing/resources/build.xml:141: /Users/George/Desktop/OpenSimplexNoise-for-Processing/lib does not exist.
Instead of trying to debug/fix the xml file I simply made the folder structure it wanted: a desktop folder named OpenSimplexNoise-for-Processing containing a lib folder.
Smooth sailing after this: BUILD SUCCESSFUL
Part of the ant build is copying the library to Documents/Processing/libraries so you can simply run the examples from there:
FWIW I've uploaded the compiled library here.
If simply wanted to use noise in Processing the built-in noise() function would do the trick.
If you want Simplex Noise without compiling Daniel Shiffman's example library you could try toxiclibs and it's toxi.math.noise package (also comes with an example sketch).
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.
This question already has answers here:
R cannot be resolved - Android error
(108 answers)
Closed 7 years ago.
I was working in a Android project and I imported it to another laptop to continue my work, but then I got this error in the project:
Description : R cannot be resolved to a variable
Resource : AccueilFragment.java
Path : /AppV1/src/com/example/appv1
Type : Java Problem
The folder gen(Generated Java Files) contain just the package com.example.appv1--->BuildConfig.java and there is not the file R.java
I was facing the same problem
Try this:
Go to Properties->Java Build Path,
Now Select "Order and Export" Tab,
Unchecked the JAR file (like v4 or v7) and then clean the project
I think this can help you.
Check drawable folders may have png images with not valid names or resources
Clean the project select project->Menu->project->clean selected project
Create a new workspace and add the backup copy of your project at newly one
I'm learning now the Java language and using Eclipse for that. When I create an "Android application project" I find out that the menu folder is missing in the res folder. Moreover, in the MainActivity.java I get the error "The import android.view.MenuItem is never used" beside the import android.view.MenuItem.
So, if someone knows how to fix it then please post a solution.
When I create an "Android application project" I find out that the menu folder is missing in the res folder
If you want this folder, create it. There are millions of possible resource folders; the Eclipse wizards will not create them all.
Moreover, in the MainActivity.java I get the error "The import android.view.MenuItem is never used" beside the import android.view.MenuItem.
That is no an error. It is a warning, indicating that the code has an import that is not needed. If you are not planning on using that import any time soon, delete that line.
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.