Failed linking file resources

Question

This is the java file that is giving the error  package com example daksh timetable   import android support v7 app AppCompatActivity  import android os Bundle  import android view View  import android widget Button  import android widget ImageView   public class MainActivity extends AppCompatActivity         Override     protected void onCreate Bundle savedInstanceState            super onCreate savedInstanceState           setContentView R layout activity main            final Button mon but tue but wed but thur but fri but          mon but    Button findViewById R id mon           tue but    Button findViewById R id tue           wed but    Button findViewById R id wed           thur but    Button findViewById R id thur           fri but    Button findViewById R id fri           final ImageView main Image    ImageView  findViewById R id day           final int   dayarray    R drawable monday R drawable tuesday R drawable wednesday R drawable thursday  R drawable friday            mon but setOnClickListener new View OnClickListener                  Override             public void onClick View view                    main Image setImageResource dayarray 0                                       tue but setOnClickListener new View OnClickListener                  Override             public void onClick View view                    main Image setImageResource dayarray 1                                      wed but setOnClickListener new View OnClickListener                  Override             public void onClick View view                    main Image setImageResource dayarray 2                                      thur but setOnClickListener new View OnClickListener                  Override             public void onClick View view                    main Image setImageResource dayarray 3                                      fri but setOnClickListener new View OnClickListener                  Override             public void onClick View view                    main Image setImageResource dayarray 4                                      The errors that I am getting are as follows     Information Gradle tasks  clean   app assembleDebug    C  Projects TimeTable app src main res layout activity main xml   Error error  resource android attr colorSwitchThumbNormal is private    Error resource android attr colorSwitchThumbNormal is private    C  Projects TimeTable app src main res layout-land activity main xml   Error error  resource android attr colorSwitchThumbNormal is private    Error resource android attr colorSwitchThumbNormal is private    Error failed linking file resources    Error java util concurrent ExecutionException  java util concurrent ExecutionException  com android tools aapt2 Aapt2Exception  AAPT2 error  check logs for details   Error java util concurrent ExecutionException  com android tools aapt2 Aapt2Exception  AAPT2 error  check logs for details   Error com android tools aapt2 Aapt2Exception  AAPT2 error  check logs for details   Error Execution failed for task   app processDebugResources     Failed to execute aapt   Information BUILD FAILED in 9s   Information 9 errors   Information 0 warnings   Information See complete output in console   This is the Activity main xml file       lt  xml version  1 0  encoding  utf-8   gt   lt android support constraint ConstraintLayout xmlns android  http   schemas android com apk res android      xmlns app  http   schemas android com apk res-auto      xmlns tools  http   schemas android com tools      android id    id activity main      android layout width  match parent      android layout height  match parent      android background   drawable background      android paddingBottom  16dp      android paddingLeft  16dp      android paddingRight  16dp      android paddingTop  16dp      tools context   MainActivity  gt        lt ImageView         android id    id day          android layout width  0dp          android layout height  0dp           android layout marginBottom  8dp          android layout marginEnd  8dp          android layout marginStart  8dp          android layout marginTop  16dp          android contentDescription  TODO          app layout constraintBottom toBottomOf  parent          app layout constraintEnd toStartOf    id guideline dayselection          app layout constraintHorizontal bias  0 519          app layout constraintStart toStartOf  parent          app layout constraintTop toTopOf    id guideline2          app layout constraintVertical bias  0 472          app srcCompat   drawable monday    gt        lt TextView         android id    id textView          style   style Widget AppCompat TextView SpinnerItem          android layout width  match parent          android layout height  wrap content          android layout marginTop  4dp          android fontFamily  serif          android text   string message          android textColor   android attr colorSwitchThumbNormal          android textSize  18sp          app layout constraintStart toStartOf  parent          app layout constraintTop toTopOf  parent    gt        lt Button         android id    id mon          android layout width  wrap content          android layout height  wrap content          android layout marginBottom  16dp          android layout marginStart  16dp          android layout marginTop  50dp          android text   string monday          app layout constraintBottom toTopOf    id tue          app layout constraintStart toStartOf    id guideline dayselection          app layout constraintTop toTopOf  parent    gt        lt Button         android id    id tue          android layout width  wrap content          android layout height  wrap content          android layout marginBottom  16dp          android layout marginStart  16dp          android text   string tuesday          app layout constraintBottom toTopOf    id wed          app layout constraintStart toStartOf    id guideline dayselection          app layout constraintTop toBottomOf   id mon    gt        lt Button         android id    id wed          android layout width  88dp          android layout height  48dp          android layout marginBottom  16dp          android layout marginStart  16dp          android text   string wednesday          app layout constraintBottom toTopOf    id thur          app layout constraintStart toStartOf    id guideline dayselection          app layout constraintTop toBottomOf   id tue    gt        lt Button         android id    id thur          android layout width  wrap content          android layout height  wrap content          android layout marginBottom  16dp          android layout marginStart  16dp          android text   string thursday          app layout constraintBottom toTopOf    id fri          app layout constraintStart toStartOf    id guideline dayselection          app layout constraintTop toBottomOf   id wed    gt        lt Button         android id    id fri          android layout width  wrap content          android layout height  wrap content          android layout marginBottom  8dp          android layout marginStart  16dp          android text   string friday          app layout constraintBottom toBottomOf  parent          app layout constraintStart toStartOf    id guideline dayselection          app layout constraintTop toBottomOf   id thur    gt        lt android support constraint Guideline         android id    id guideline dayselection          android layout width  wrap content          android layout height  wrap content          android orientation  vertical          app layout constraintGuide end  196dp    gt        lt android support constraint Guideline         android id    id guideline2          android layout width  wrap content          android layout height  wrap content          android orientation  horizontal          app layout constraintGuide percent  0 15339233    gt     lt  android support constraint ConstraintLayout gt

User · Answer

I had the same problem but it occured in all my projects, I tried Invalidate Cache / Restart but even it doesn´t solved the problem.

At the end I realized that in my Gradle Settings, Offline Work was enabled.

Go to Build, Execution, Deployment > Gradle in Gradle Settings unchecked Offline Work.

It solved the the problem downloading some configuration files for my Android Studio.

User · Answer

My error was in a xml drawable file  I had the first liner duplicate  Changing it to this worked for me    lt  xml version  1 0  encoding  utf-8   gt

User · Answer

If anyone reading this has the same problem  this happened to me recently  and it was due to having the xml header written twice by mistake    lt  xml version  1 0  encoding  utf-8   gt   lt  xml version  1 0  encoding  utf-8   gt   lt  -- Remove this one -- gt   lt shape xmlns android  http   schemas android com apk res android  gt        lt solid android color   color mug blue   gt        lt corners android radius   dimen featured radius    gt   lt  shape gt    The error I was getting was completely unrelated to this file so it was a tough one to find  Just make sure all your new xml files don t have some kind of mistake like this  as it doesn t show up as an error   EDIT It seems like it shows up as an error now  make sure to check your error logs

User · Answer

-May be the problem is that you have deleted  java files doing this doesn t delete the  XML files so go to res-  layout and delete those  XML files that you had delete before  -the another problem may be you haven t delete the files that is present in manifests under  syntax that you deleted recently    So delete and run the code

User · Answer

To be more generic about the answer provided by  P Fuster  There can be error in your xml files   I encountered the same error and was having error in the drawable where end tag was missing

User · Answer

One possible solution I already mentioned in a comment      I had an issue in XML file that IDE did not highlight  Had to ask my   colleague to compile for me and it shown in his IDE  Buggy Android   Studio    But I found a way around that   If you go to Gradle panel on the right  Select your desired module  eg  app  then under build select assembleDebug it will show you all errors in stdout

User · Answer

This sometimes happens when you have a random XML file  doing nothing  Removing the file resolves the issue

User · Answer

In my case  I made a custom background which was not recognised   I removed the  lt  xml version  1 0  encoding  utf-8   gt  tag from the top of those two XML resources file   This worked for me  after trying many solutions from the community   P Fuster s answer made me try this

User · Answer

It is a xml error for some reason may be because of deleting a view or string in another view or may be for missing   or          etc  But here I am using a good technique to figure out where is the problem exactly  -   Go to every single xml file and minimize the root element if you find something like this  so you got where is the error  fix it then repeat the process for all files    If the file has an error you will see three dots with red color  Fix the error  here I removed this line because this array is not in the string file any more   Now you can see there is no error in this file any more if you still got the main error so you have to repeat this process again to all xml files until you solve the error    I know it is not the solution of the main problem but it will make you find where is the error quickly and save you time   Update  There is another way you can find out easily  as Bennik2000 write in comment  you can look at the right scrollbar for red lines  they also indicate errors   Update  I found a very simple way to get where is the error exactly if it is in resource file or even java file  1- Go to Project Window   2- Open the file that has the error  3- Click F2 to go to the nearest error appears  it will go to the correct line

User · Answer

I was doing Temperatur Converter App I was facing same error while running the app as  Android Studio linking failed  In String xml a line was missed  I included the line  It went fine without any errors    Before Correction       lt resources gt   lt color name  myColor  gt  FFE4E1 lt  color gt   lt string name  Celsius  gt To Celsius lt  string gt   lt string name  fahrenheit  gt To Fahrenheit lt  string gt   lt string name  calc  gt Calculate lt  string gt   lt  resources gt    After editing    lt resources gt   lt string name  app name  gt Temp Converter lt  string gt   lt color name  myColor  gt  FFE4E1 lt  color gt   lt string name  Celsius  gt To Celsius lt  string gt   lt string name  fahrenheit  gt To Fahrenheit lt  string gt   lt string name  calc  gt Calculate lt  string gt   lt  resources gt

User · Answer

Sometimes it happen what you copy paste code from another project fro example you copy   lt android support design widget NavigationView         android id    id nav view          android layout width  256dp          android layout height  match parent          android layout gravity  start          android background   android color white          android fitsSystemWindows  true          app headerLayout   layout nav header main          app itemTextColor   color colorDrawerItems          app menu   menu activity main drawer    gt    Unfortunately Android studio not always show dependency error  but what happen is that class NavigationView is missing because implementation  com android support design not added to the project

User · Answer

Look at the error you are getting       C  Projects TimeTable app src main res layout-land activity main xml Error error  resource android attr colorSwitchThumbNormal is private    It means that in your activity main xml you are referencing the color  android colorSwitchThumbNormal   but inside the  android  namespace that resource is private  What you probably meant to do is try to reference that color from the support version of this attribute  so without the  android   prefix    lt item name  android colorSwitchThumbNormal  gt  color myColor lt  item gt    Replace with    lt item name  colorSwitchThumbNormal  gt  color second lt  item gt

User · Answer

Add agian your deleted drawable image  jpg png etc formate  and  Then run your project to fine working on android studio 3 6 1

User · Answer

This message means there is a syntax error in your XML file   If Logcat cannot pinpoint the error with a friendly log message with the xml file name  try cleaning the project and rebuilding the project  It worked for me   In the Build tab  you will get a node named Android Issues    The error message explaining the error with the XML file is under it

User · Answer

I know this question has been answered already  however  I still would like to add to what a lot has posted here for others having a similar but not specific problem   This error sometimes also comes as    Android resource linking failed      It is sometimes vague    The solution sometimes could be quite boring and painful but  this error is absolutely nothing serious    In this case  the error is not Vague because Android Studio pointed to the problem file   General Cause The error shows up when Gradle encounters an error  Usually a syntax or typo error  in one or more of your XML files   Most of the XML files are located in the res folder  however  you might still find some outside the res folder   For example  the AndroidManifest xml located in      src main AndroidManifest xml      Here is an example of a layout file that would give the    Error  failed linking file resources    error   Solution To solve this problem  all you have to do is go through each of your XML files to figure out where the error might be   This could sometimes be time-consuming but be rest assured that the error will disappear as soon as you find and fix the problem XML   You might be lucky and Android Studio will point you in the exact direction just like the one asked in the question        Other times like when you are using an older version of Android Studio  the error would not be this specific   Here are some Tips to finding the problem XML quickly If you have a lot of XML files and it would be just too difficult to go through them one after the other  you could use the following tips to make the process easier   Undo   Most times  you are already halfway through a project before you experience this issue   Meaning that it was a recent change to one of your XML files that caused the issue   If that is the case  you can try to undo your recent change to the XML files   To undo  simply use the key combination  Ctrl Z   Open every XML file   The second method involves simply opening every single XML file in your project  Without scanning    The reason for this is that sometimes  after opening the problem XML file  Android Studio then detects the error and underlines the exact line

User · Answer

This might be useful for someone who is looking for a different answer  Go to the Gradle Panel and select your module -  Task -  Verification -  Check  This will check the project for errors and will print the log where the error occurs  Most of the time this Kind of error must be a typo present in your XML file of your project

User · Answer

I was having the same issue  It was due to a typo in an attribute in one of my XML file  Anyways  Android Studio did not specify the source of the error in the first run  But when I did a      Build -  Clean Project   and then ran the app again it showed me the exact line in the XML code where the typo was

User · Answer

I have this problem The main problem was i added an attribute to an BottomAppBar in the xml file I found error message in android bottom build section explained that error i replaced the attribute and every thing was ok  For others who have the same error but my solution not ok with them you have to read the error message it will guide you to the pain point

User · Answer

It can also occur if you leave an element with a null or empty attribute in your XML layout file else if your java file s path of objects creation such as specifying improper ID for the object    here frombottom  AnimationUtils loadAnimation this R anim   in which anim  the id or filename is left blank can lead to such problem

User · Answer

Run   gradlew build -stacktrace in Android Studio terminal  It helps you to find a file that causes this error

User · Answer

This similar error may also show if you have deleted an Activity java file previously and have not deleted the corresponding xml layout file   Delete the xml file for the deleted Activity java file and Clean or Rebuild the project   The reason behind it may be because of the mismatch of context in the xml   This might occur if you are copy-pasting an xml layout code  Match the tools context to the java file of the activity

User · Answer

You maybe having this error on your java files because there is one or more XML file with error   Go through all your XML files and resolve errors  then clean or rebuild project from build menu  Start with your most recent edited XML file

User · Answer

Error is associated with some issue with  xml file  Manually open each xml format file to check for error  I had same issue  Had to manually open each file  There was an error in  string call

User · Answer

Check your XML files for resolving the Errors Most of the time the changes made to your XMLfiles get Affected so try to check the last changes you made   Try to Clean your Project    It Works  Happy Coding

User · Answer

It s Obvious that if you have a big project  it will be a nightmare to check each and every xml file    Run the following command in android studio terminal and it will give you the filename with the issue  gradlew build --stacktrace

[android-resources] Failed linking file resources

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