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Android Studio marks R in red with error message "cannot resolve symbol R",Android Studio

Time:10-30

enter image description here

I did it, but it was hopeless.

1) Sync Project with gradle files
2) Build -> Clean Project
3) Build -> Rebuild Project
4) File -> Invalidate caches

CodePudding user response:

Looks like a legacy project trying to configure a material component, would you mind trying these?, though I'm not quite sure if they would help or the version would be compatible, but afaik the layout_behavior is part of the design framework.

If its not androidx, try this

implementation 'com.android.support:design:28.0.0'// latest

if its androidx, try this then

implementation 'com.google.android.material:material:1.8.0-alpha02' //latest

These are the latest versions from maven artifacts com.android.support:design and com.google.android.material:material

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