Android Studio and android support v4 app Fragment cannot resolve symbol

Question

I am tryng out Android Studio instead of Eclipse  I install it and then start a completely new project and follow the wizard  I add no code of my own   Then  I right-click to create a new component  a new Fragment     and choose a new fragment     and as soon as I do  I see compile errors         so I start googling and find out that I need to install and reference support library 4  and that I do  When I check the build gradle  whatver that is  new to me coming from Eclipse   I see     but I change that to    because they said so here  After recompiling and all that  the error is still there  I then reference the  jar-file directly  like this     and again do recompile yada yada  but that doesnt help either   This behaviour seems very strange to me  What am I missing here  This is the SDK Manager view     So  what am I missing  Thanks

User · Answer

For me the cause of problem was broken class path:

Library Gradle: com.android.support:support-v4:28.0.0@aar has broken classes path:   
/Users/YOUR_USER/.gradle/caches/transforms-1/files-1.1/support-v4-28.0.0.aar/0f378acce70d3d38db494e7ae5aa6008/res

So only removing transforms-1 folder and further Gradle Sync helped.

User · Answer

For me   Build- Clean Project solved this question

User · Answer

File  -   Invalidate Caches      worked for me

User · Answer

I found that if you have comments in your build gradle it may break when you try to add a new support library  So make sure you check your build gradle and see if it looks alright manually

User · Answer

Hrrm    I dont know how many times this has happend so far  I test  try  google  test again and mess around for hours  and when I finally give up  I go to my trusted Stackoverflow and write a detailed and clear question   When I post the question  switch over to the IDE and boom - error gone   I can t say why its gone  because I change absolutely nothing in the code except for that I already tried as stated above  But all of a sudden  the compile error is gone   In the build gradle  it now says   dependencies       compile  com android support appcompat-v7 18 0        which initially did not work  the compile errors did not go away  it took like 30 min before the IDE got it  it seems    hmm         EDIT     When I view the build gradle again  it has now changed and looks like this   dependencies       compile  com android support support-v4 18 0 0      compile  com android support appcompat-v7 18 0        Im not really sure what the appcompat is right now

User · Answer

replace this line of code   import android support v4 app FragmentActivity    with  import androidx fragment app FragmentActivity    and you are done

User · Answer

Android studio has option to manage dependencies   Follow path      Click on File  then select Project Structure Choose Modules  app  Click  Dependencies  tab Click on the   sign  choose Library Dependencies Select support-v4 or other libraries as needed and click OK     FYI check link stackoverflow com a 33414287 1280397

User · Answer

I encountered this issue and tried everything including File    Invalidate Caches but nothing worked  The reason this issue was happening for me was because I had external projects that were using a different AppCompat version to my main gradle file   After I updated all gradle files to be the same version the compile error went away

User · Answer

I m running the most current version of AndroidStudio to date  11 10 2015  -- v1 4  build AI-141 2288178  built on September 28  2015  and I built my project and everything worked fine   Then after a few hours of my computer being inactive I came back  edited some code that had nothing to do with the support libraries and started seeing       cannot resolve symbol  fragmentactivity    and I was seeing red highlighted items related to fragmentactivity in the AndroidStudio editor    The solution was to simply do a      Build   Rebuild Project      I only mention this so others might see it and know it is happening out there

User · Answer

I was facing the same issue  As it turns out in my build gradle file there was this     configurations       all  exclude group   com android support      Removing that fixed my issue  So guys  if doing all that and still your issue is not fixed  look for any exclude keywords in your gradle file

User · Answer

1  File -  invalidate caches  2  Build-  Rebuild  its work for me

User · Answer

To downplay the  magic  of this issue a little bit  You need an Internet connection after you make those changes  If for some reason required libraries cannot by downloaded  instead of giving an appropriate message  like  Failed to fetch libraries   you will simply get the same build error  Was struggling with this for an hour before realizing that my company s VPN blocked the repo

User · Answer

I found a shortcut  File - Project Structure - Tab Dependencies Click on the green   sign  select support-v4  or any other you need   click OK   now go to your gradle file and see that is been added

User · Answer

Do sth  modification  just to gradle sync  over app level build gradle and sync  Again  redo what you changed in build gradle and sync  It should fix your problem

User · Answer

File -   Invalidate caches Restart  This worked for me

User · Answer

I m using buck and it seems like by removing the   idea libraries in your project folder and sync gradle again works for me

User · Answer

Try this may will help you Go to  File  -   Invalidate Caches      and select  Invalidate and Restart  option to fix this

User · Answer

Closing and Re-Importing project worked for me

User · Answer

DID NOT WORK   I have already had the following dependency in my build gradle  implementation  com android support support-v13 26 0 2    I have tried all of the following     Invalidate Caches Restart Sync project with gradle files Clean project Rebuild project gradlew clean   But  none of them worked for me   SOLUTION   Finally  I solved it by deleting    idea libraries   and then synced with gradle and built again

User · Answer

I got the same problem since I updated to latest version of Android Studio 0 3 7  So you can try with my stuffs   Ensure you have updated to latest version Android Support Repository - 3 Android Support Library - 19  As your attachment picture above  you did it already  Then adding the following setting to your build gradle  dependencies       compile  com android support support-v4 19 0 0      One more thing  Please make sure your Android SDK is targeting to right SDK folder

User · Answer

For everyone who comes to this thread and builds with maven  add support-v4 dependency and build to download the repo   Then add the library manuelly to your project   Project Structure -  Libraries -  Add  And move to you re repo for the correct jar file  C  Users XXXXXXX  m2 repository com google android support-v4 r7 support-v4-r7 jar

User · Answer

The symptom of this problem is usually that the build works fine from the command line  which means your build gradle file is set up right  but you get syntax highlighting errors in the IDE  Follow This Steps To Solve The Problem  Click on Tools from the toolbar usually at the top part of your IDE  and then navigate to Android then navigate to Sync Project with Gradle Files button  We realize it s less than ideal that the IDE can t just take care of itself instead of forcing you to manually sync at the right time  we re tracking progress on this in https   code google com p android issues detail id 63151

[android] Android Studio and android.support.v4.app.Fragment: cannot resolve symbol

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