Android Studio says “cannot resolve symbol” but pr

Question

I'm importing twitter4j in AndroidStudio, using the following in my build.gradle:

dependencies {
  compile 'com.android.support:support-v4:18.0.+'
  compile files('libs/twitter4j-core-3.0.4.jar')
}

The project compiles fine, and I can create twitter objects without a problem. However, in Android studio, anything referencing that library shows "cannot resolve symbol" and displays in red. What do I need to do to get Android Studio to recognize the library?

I have already tried rebuilding the project, ./gradlew clean, and closing and re-opening my project.

Answer 1

If nothing else helped, you could do as Android Studio suddenly cannot resolve symbols recommends:

• Exit Android Studio
• Back up your project
• Delete all the .iml files and the .idea folder
• Relaunch Android Studio and reimport your project

Answer 2

It happened to me when I removed the whole files in .gradle/caches, then studio downloaded the dependences. The dependences not showed in the External Libraries but I can build App successfully. rebuild clean Invalidate and Restart have no effect. I solved the problem by the steps:

• Close Android Studio completely
• Remove .idea package in your project
• Restart Android Studio

Answer 3

For mine was caused by the imported library project, type something in build.gradle and delete it again and press sync now, the error gone.

Answer 4

Invalidate Caches / Restart didn't work for me this time.

Found a solution like this:

1. Remove the compile *** or implementation *** line in build.gradle.

2. Clean and rebuild. Errors should be raised here.

3. Add the line in step 1 back to build.gradle.

4. Clean and rebuild.

Weird...

Answer 5

Invalidate Caches didn't work for me (this time). For me it was enough changing the gradle and syncing again. Or https://stackoverflow.com/a/29565362/2000162

Answer 6

For my case working with AndroidStudio 2.2.3 the solution was to change the gradle wrapper/distribution to use local one in the Gradle Settings (despite of being "recommended").