android studio new project cannot find symbol 'R' - android

I just made a clean android studio project and I'm getting errors in my Main file saying R isn't found. I know it's not an xml error since it's a new project...I've tried to sync project with gradle files but that doesn't seem to do anything. It just comes back with an :app:mergeDebugResources error..

Select Build > Clean Project
It should rebuild and recreate the R file :-)

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cannot find symbol class R android studio 3.0.1

cannot find symbol class R
Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
Compilation failed; see the compiler error output for details.
I think the project xml design contains any error. in that case R file could not be created. So please verify the xml file if no such error found then rebuild the project using Build → Clean Project / Rebuild Project
Check if there are any errors in your build.gradle (Module: app) file, and then sync it by using the refresh button from the Gradle panel.
Build > Clean Project, and then Build > Rebuild Project
I have been using MacBook Pro for my Android development, but I don't shut down but use the sleep mode normally. Because of this, my Android Studio gets out of control occasionally. Therefore, by simply restarting your entire development PC might resolve your issue.
Alternatively, you can try File > Invalidate Caches/Restart to clean up all the related caches.
Make sure that you have imported import <package_name>.R; (you can use Alt + Enter), than clean and rebuild your project (Build → Clean Project / Rebuild Project)
Note: Sometimes importing R file could not resolve the issue

When Rebuild Project at that time android studio giving error

I have just create new project and added jar files and just clicked on Rebuild Project from Build menu but it gives below error.

Importing eclipse projects to android studio

I'm trying to import an eclipse project to android studio but keep getting the error message:
Gradle 'PhotoGallery' project refresh failed:
Error:C:\Users\user\.gradle\caches\2.14.1\scripts-remapped\settings_2yhllogm103q9sdcjkhbixdfg\9ejwtyixtds2dlx9q4hqm4iap\cp_settings57408229\cache.properties (The system cannot find the file specified)
I've already tried the below, but the problem persists:
File > Invalidate Caches/Restart > Invalidate and Restart
Here is a screenshot of the issue:
Removing .gradle directory should resolve your problem because android studio will recreate gradle directory without an error.

Why the following error is showing while importing an project?

Why the following error is showing in android studio while importing a external project (https://github.com/udacity/ud839_Miwok/tree/Starter-code)?
Error: Gradle 'ud839_Miwok-Starter-code' project refresh failed
Error:Content is not allowed in prolog.
Try to clean and to rebuild your project. This is located at the Build Menu.
If this does not help, please show more details like your project tree, especially your resource diretory. It may also be that you created something at a place where it is not allowed to be.

Android Studio renaming

I recently renamed my Android app project in Android Studio (1.1b4) project, but am now unable to rebuild. I get this error:
Error:Execution failed for task ':app:clean'.
> Unable to delete directory: D:\AndroidstudioProjects\PcUpload\app\build\intermediates\res\release\values-sw600dp-v13
I renamed by right-clicking the top-level in the Project hierarchy, then selecting "Refactor...Rename".
Can anyone advise how I can remedy this?
Please make sure to rename project using refactor. You are getting that error because that project technically doesnt exsist under that directory, due to rename.
Another solution would be
Close android studio
Change project root directory name
Open android studio
Open the project(not from local history but by browsing to it)
Or follow This youtube video!
Or this!

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