package R does not exist

Question

I m getting the dreaded package R does not exist  it s killing me   The code is fine I have apps in the market running the code    Now it s effecting simple webview applications  o 0  R string app name is error d my main xml and string xml is fine  I m sooo confused   I re opened an older version to  borrow  some code and it was flooded with R  errors  I did a clean and nothing changed except for import R android being added at the top   I even loaded into Netbeans and I get the same thing  Clean is not working  Can I write the R java file myself   What is this R thing  isn t R  supposed to correspond to R java

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Delete import android R  from all the files   once clean the the project and build the project     It will generate

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If this error appeared after resolving merge conflicts  simple Build -  Clean project could help

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I just ran into this error while using Bazel to build an Android app   error  package R does not exist                   mContext getString R string common string                                           Target   libraries common common paidRelease failed to build Use --verbose failures to see the command lines of failed build steps    Ensure that your android library android binary is using an AndroidManifest xml with the correct package  attribute  and if you re using the custom package attribute on android library or android binary  ensure that it is spelled out correctly

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Just got rid of the error in my project  I had imported a sample project  I had changed the package folders but I had not updated the package in one of the java files   Most likely cause of this error  package R does not exist  is that the package name in Java or manifest file is incorrect  Make sure it is correct and in sync and then do a clean build

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You may try  Android Studio top menu   File   Invalidate caches   restart     Click on invalidate cache   restart button to restart your project  Resolve R xxxx xxx again if some of the fragment class R class didn t resolve properly  then rebuild your project  Hope it helps

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I had   error  package R does not exist  and assumed javac  didn t have access to R java  So I appended  PROJ LOC  gen to sourcepath  and it worked   SOURCEPATH  PROJ LOC  src  PROJ LOC  gen  I m not using Android Studio or Ant  or XML

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What files are you importing into the files getting the R error    My understanding of the R file are that they are automatically generated reference lists to all attributes within the Android app  Therefore  you can t change it yourself    Are you using Eclipse to build this project   Were the older projects getting these errors made before updating Eclipse   What are the references that are getting errors   Check to make sure that you ve not imported another R file from other copied code in another app

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If you encounter this error in Android Studio   Check the Gradle module file s  -  defaultConfig -  applicationId setting   Check the AndroidManifest xml -  manifest package tag   Check the package declarations in all src java files   Sync  Clean then Rebuild with Gradle   NEVER build your own R file  R is auto-generated from your source java files and build settings

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I forgot to add the  name  of my  package  at the top of my java class  Check if yours is actually added

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I solve My problem       package R does not exist      Goto AndroidManifest xml file  and changed the minSDKVersion  17  from 19

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No benefit of writing R java yourself because it is changed on every build   Just remember to use R something for example   R raw filename from inside classes that has package value similar to the package value inside the AndroidManifest xml  because R  resources IDs are defined for the current application or library and they are all checked if exist on compile time  so does not make sense to  allow them to be accessed from  code  that does not target the current application or library and can be used in other places

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In my case I realized that I was creating multiple packages in the project  Within the Android Manifest I found that the provider name was incorrectly holding the value of MyContentProvider instead of  provider MyContentProvider  My main package  with the UI  was co companyname database provider instead of co companyname database    Then on the import statements for the affected class I simply right-clicked and asked Android Studio  0 8 6  to optimize my import statements  I also noted that if you search for  R in the AS search bar at the top right corner of the IDE you can find an auto generated R java file that is part of your package  At this point you don t have to change anything  Studio should fix up the project after you correct the Android Manifest file and rebuild    One other item is that in one class I was doing making use of the toString   length   to evaluate a string but swapped those out for TextUtils IsEmpty  stringVal   Can t think of anything else that I did to resolve the issue    Hope this helps someone   NB - All of this is with AS 0 8 6  P S    R java is auto-generated so read the header     AUTO-GENERATED FILE   DO NOT MODIFY        This class was automatically generated by the    aapt tool from the resource data it found   It    should not be modified by hand

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TL DR  if you get the error  package R does not exist   possible reasons are    some error in the XML resource files -  fix XML errors the current package is different from the R package  see package attribute in AndroidManifest xml  -  import R class  e g  import com example android R  -  or use the appropriate package in your source  e g  package com example android  -  or change the package attribute in AndroidManifest xml to  lt manifest xmlns android       package  com example android      gt   if that s appropriate the used R ids are from the system resources -  do not import android R  but prefix the offending ids with android   e g  android R layout simple list item 2 You may import android R instead of prefixing the ids of course  but then you cannot import the application R class anymore and must prefix the application ids  e g  com example android R id main menu      The R class is generated automatically from the application s resources  It contains the ids for these resources and is contained in the package named in the  lt manifest gt  tag in the corresponding AndroidManifest xml file   If there are no errors in the resource XML files  the R java source will be generated in a package subdirectory below gen  and compiled     There is another R class located in the android package  This android R class contains some nested classes  which in turn contain ids and other values for system resources     To use a class in Java  you must name the class with the whole package  e g   java util List lt Object gt  list   new java util ArrayList lt Object gt       or import the class and then use it without package   import java util List  import java util ArrayList  List lt Object gt  list   new ArrayList lt Object gt       You can also use a class without naming the package  if both the current class and the used class are in the same package  e g   package com example android  public class A                     package com example android  public class B       public void useA             A a   new A

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Wrong path  Project  cashes  the pointers to the images and if you have made name changes to the path for example Refactored package or folders  Then just simply write the R letter again and the editor suggests the right path and it will work  In this case your filenames are right and the content that is referred in the R  pointer is present but the path is wrong  thus clean and build won t work

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if you are developing in android studio and refactored the package name then you should change the package name in android manifest and app gradle file    applicationId  change here your package name    and in manifest file   package  change here your package name

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The R class is Java code auto-generated from your XML files  UI layout  internationalization strings  etc   If the code used to be working before  as it seems it is   you need to tell your IDE to regenerate these files somehow    in IntelliJ  select Tools   Android   Generate sources for  lt project gt   If you know the way in another IDE  feel free to edit this answer

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R java is an autogenerated file  it usually does not get compiled if you have errors in xml file   No You cannot write your own R java file  it has to be generated by the resource compiler    Check for errors in all your xml files

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Below are worked for me   In AndroidManifest xml file  check whether the package name is correctly typed  import com example appName R   import package  name R    If the first step is not worked try the second one

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Sometimes  it gets solved when you just re-import the project into Android Studio

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Another case of R  breakage is Annotations Processing    Some processing could refer to classes located in certain folders or folder levels  If you move required classes to other location  you can get R  as an unknown class   Unfortunately the error-pointer to this problem is not evident in Android Studio

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Never  ever try to write the R class yourself   Have you imported the right R class in your files   Doing  import android R    instead of  import com example R    seems to be the problem for a lot of people  After cleaning and building  my classes sometimes import the wrong one

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Below are some technics which you can use to remove this error -   Clean your project  Buidl- clean Project Rebuild project  Build -  Rebuild Project Open manifest and check is there any resource missing Check-in layout to particular id if missing add it If the above steps did not work then restart android studio with invalidating the cache

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When I experienced this  I created a new project  and copied the files from my old project to my new one    Start a new project Add the old files into the new project  copy and right click on Layout  drawables com packagename      to paste my old projects files   However  I still had the same problem  R does not exist  Then I realised that I had copied and pasted Manifest from my notepad into Android Studio manifests and I hadn t changed the package name in the manifest file   Therefore  once I changed the package name in the manifest to the new project name  the new project I d created worked fine

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Just to make this simple   import your app package R    Of course  replacing your app package with your app package   In all the classes which use R resource references  remove any other import with  R  i e  import android R

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I suppose it used to work but now it doesn t    This can happen if you change PACKAGE name inside your MANIFEST file   lt manifest    package  com example android        If you want to change package name   Change the package name manually in the manifest file   Click on your  R java class and the press F6  It will allow you to move the class     to other package  and all references to that class will be updated

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Sample  My package is com example mypc f01  to fix error you add line below to Activity   import com example mypc f01 R

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For anyone who ran into this  I refactored by renaming the namespace folders  I just forgot to also edit AndroidManifest and that s why I got this error   Make sure you check this as well

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I run into this problem every time I switch computers and try to import old projects from files transferred via a USB   My workaround is to just create a new project and copy  drag  the files into the IDE  currently using Netbeans  and rebuild   This is an annoyance and a bit of a hacky solution  but it fixes the problem   If this happens to you  worst case is you might have to backup your files  delete the project  and just drag the files in there and recompile   Hopefully it won t come to that but that would be your nuclear option

[android] package R does not exist

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