'"Cannot find symbol R" error after renaming package name
After renaming my project package name (with Refactor), I got this error:
Error:(7, 44) error: cannot find symbol class R
All of my R usages are invalid. I tried to fix it manually but it doesn't work for me. Invalidate chases/Restart doesn't help me, either.
Solution 1:[1]
Try the following :
Try deleting your R.java file , android studio will regenerate it.
Clean Project
Rebuild Project
And check:
Check the AndroidManifest.xml, there's a package attribute on the top-level element
(Well it depends on how you renamed your package name)
Solution 2:[2]
Just do the following:
Ensure that the package name at the header of the AndroidManifest file has been renamed to your new package name. This worked for me.
Solution 3:[3]
Try to change application Id in build.gradle. Or remove any imports of com.***.R in your activity and let android studio to automatically import for you.
Solution 4:[4]
Seems like, you changed the application package name but didn't change the import statements. So look for import statement of class R. It must be like
import <package_name>.R;
If it's not a problem with import statements then look whether the R.java file has generated or not. It generally doesn't get generated if there is a problem with the application layout(xml) files. The R class file is generated only when all your xml layout files are correct.
Clean the project and check.
Solution 5:[5]
3 packages you may see as marked, When you edit the package name make sure you change all 3 of them else you may face R error which will prompt you to press alt+enter to name it as ur old package name
Solution 6:[6]
Check your AndroidManifest.xml ( com.package1.package2 )
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.package1.package2">
90% of symbol R errors because of that line. When you refactor your old package, mostly cases this package didn't change
Solution 7:[7]
if you rename your android manifest package you have to rename the "packages com.newname" sentence at the beginning of your class.
Solution 8:[8]
You have to first close android studio. Then
- Delete "build" folder
- open the commandline and type
gradlew clean - Then type
gradlew assembledebug - If the build succeeds, feel free to go back to android studio
Solution 9:[9]
In my case, this error showed because I changed the package name without ticking the boxes (Search in comments and strings and Search for text occurrences)
The solution for me: Rename package again and make sure you tick the two boxes as in the photo, then Do Refactor
Solution 10:[10]
When all these answers do not work:
In Android Studio : Menu File -> Invalidate Caches and restart Android Studio
Sources
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Source: Stack Overflow