Develop Reference

How to remove "cannot resolve symbol" for already added dependencies

I am receiving a "can not find symbol" error for dependencies which are already added to the project
The app is running on android studio 3.1, and it compiles and runs normally, as if there are no dependency issues. I tried clearing gradle cache with the cleanBuildCache command, and I also invalidate the cache from File > Invalidate Cache/Restart but to no avail.
Import error in red
Support libraries under dependency on the right, but not showing in external
libs on the left

Try doing the following:
Save your project and close Android Studio
DELETE Project Name.iml file from you project directory
DELETE app.iml file from your Project Name/app directory
DELETE .idea folder from your project directory
Project Name is the name of the project that you set when you first created your project in Android Studio.
Relaunch Android Studio, load your project ,sync gradle and build again.
NOTE: You might have to be connected to internet as it will download the libraries again that were delete when deleting the .idea folder
Also update your gradle verions and use implementation instead of compile as it was deprecated long ago.

Have you tried Build > Clean Project? Or a good old fashioned restart of Android Studio?

Not able to build apk in android studio

I am trying to build apk in android studio but getting below error:
Cause: property(interface org.gradle.api.file.Directory,
transform(property(interface org.gradle.api.file.Directory,
fixed(class
org.gradle.api.internal.file.DefaultProjectLayout$FixedDirectory,
E:\project\TestApp\App\build))))\AndroidManifest.xml (The filename,
directory name, or volume label syntax is incorrect)
I am using com.android.tools.build:gradle:3.3.2 and android studio version is 3.3.2. I think I updated studio after this issue start occurring, earlier I was able to build. Can anybody suggest how this error can be resolved.

Please do the following
make sure your classpath and dependencies upto-date in gradle
check the resource folders that are mapped correctly in manifest file
Invalidate caches and restart (File -> Invalidate caches and restart)
clean project and rebuild

Build an Android project with error

A unknown error occurs when I was building a android project with Android Studio, and the specific error as follow twisted me.
''Error:C:\Users\username.gradle\caches\3.3\scripts\ao5yh51kitdkvn790wbtokixe\init\init2ce2764386e2b8bb7806b691787e7bd8\cache.properties
(系统找不到指定的文件(can't find the file specified )。)''

1.clean project:
click on build>select clean project.
2.build project:
click on build>select build project.
3.invalid caches/Restart studio
click on file>select Invalid caches/Restart.

I started new application in my Android Studio, while syncing the files got error on Gradle syncing file

Error: Failed to create parent directory 'C:\Users\user1\.gradle\caches\modules-2\files-2.1\org.sonatype.oss\oss-parent\9' when creating directory 'C:\Users\user1\.gradle\caches\modules-2\files-2.1\org.sonatype.oss\oss-parent\9\e5cdc4d23b86d79c436f16fed20853284e868f65'
When i am installing android studio i received an error "Error opening file for writing " relates to apache-9.pom file. I neglected and ignore that error now it is showing error project is not syncing and editing and debugging is not working.

Clean project
Rebuild project
Sync Gradle
if doesn't work try to check build tool
or - clean out the system caches:
On the main menu, choose File | Invalidate Caches/Restart. The Invalidate Caches message appears informing you that the caches will be invalidated and rebuilt on the next start. Use buttons in the dialog to invalidate caches, restart IntelliJ IDEA or both.
Gradle cache
Gradle cache locates at
On Windows: %USER_HOME%.gradle/caches On Mac/Unix: $HOME/.gradle/caches/ You can browse to these directory and manually delete it or run

cannot resolve R symbol in androidStudio 1.2.2 version

I tried to import existing project in android studio, its showing me error can not resolve R.
I tried
Rebuilding the project .
Cleaning the project .
Syncing with Gradle Files .
Closing the Project, closing AS and relaunching / reopening .
Double checking all support libraries are up to date in the SDK manager .
delete iml file and .idea file .
changing build version .
changing plugin version .

File -> invalidate caches
then
Restart application
Android Studio cannot resolve R in imported project?