I started the studio and see such a picture, considering that all the classes are broken and everything is lit in red - the project is going and working. Help me fix it. Invalidate does not help. Instead of classes in general pieces of markup ...
Close Project
Try Removing .idea folder from your project.
Restart your project again in android studio
I have delete caches folder from C: Drive. after open project in an Android studio.
C:\Users\admin.AndroidStudio3.3\system\caches
link here
I am seeing in Android Studio 3.1.2 an error for AppCompat themes and colors attributes like attr/colorPrimary.
But only in Android Studio. Compile and run does work.
For example:
My app.gradle:
supportLibVersion is 27.1.1!
This helped in the similar problem. Maybe this help you:
Close the project from the File menu. Then open the project again as existing Android Studio project.
I posted my answer on link mentioned by V.March. Basicly Invalidate Caches / Restart solved my problem
Im new to android studio and while exploring android studio i edited build.gradle, now i want to get it back to how it was at the beggining.
I would like to know if it is possible delete gradle scripts and somehow recreate them how they were at the beggining of the project.
Thanks in advance.
Just delete existing ones and re import your android project in studio. It will automatically re generate all the build.gradle files for you. Give a try.
While importing projects in android studio ,this window comes and never disappear. please help. I am new to android studio
Looks like one of your dependencies that Android Studio is trying to download is offline. Check out this related SO post:
Android Studio stuck on "Gradle: resolve dependancies '_debugCompile'" or 'detachedConfiguration1'
I am teaching android app programming at a highschool. I found Eclipse to fragile so we are now trying out Android Studio. But a couple of students get that Android Studio with R. in red font, showing that it is not recognized.
This happened for example when the student copied the contents of my files.
It sometimes happens when you open a proyect from other sources. Just Synchronize it or press Ctrl-Alt-Y.
R.java file issues : 1) check the naming convention of images in drawable folder with size.
2) check the style of your application
In your case it may be missing style .. So upadate the style in value folder as per application .
The most common reason for this error is bad XML coding. For example using android:src="#drawable#drawable/picture" in ImageView will give you R error as it will not let R.Java file to build. Its hard to trace such errors as XML file will not show any error.
Also take a look if your resources are of good quality!
Hope it helps! Cheers
Build -> Clean Project
Tools -> Android -> Sync Project with Gradle Files
and all OK!
Try adding the following:
android.enableAapt2=false
to gradle.properties and Refresh:
You can also do the following: Clean Project and Sync Project with Gradle Files.
try importing your project :
To migrate existing Android projects, simply import them using Android Studio:
In Android Studio, close any projects currently open. You should see the Welcome to Android Studio window.
Click Import Non-Android Studio project.
Locate the project you exported from Eclipse, expand it, select the build.gradle file and click OK.
In the following dialog, leave Use gradle wrapper selected and click OK. (You do not need to specify the Gradle home.)
Android Studio properly updates the project structure and creates the appropriate Gradle build file.
First if the existing project was developed in eclipse you need to import the project and then check what are the error. If your students are coping codes from your project then after coping the codes they need to clean and sync the project. If still your problem not solved try this in android studio :-
File/invalidate caches/restart.
Hope it helps you :)
Especially, for regeneration of R.Java file.
If you have tried all these options:
Clean Project
Rebuild Project
Invalidate Caches / Restart
deleted .gradle folder
deleted .idea folder
deleted app/build/generated folder
checked your xml files
checked your drawables and strings
and still face problem then check your classpath dependency in your Project Gradle Scripts and if it's, this:
classpath 'com.android.tools.build:gradle:3.3.2'
then downgrade it to, this:
classpath 'com.android.tools.build:gradle:3.2.1'
clean and rebuild it will sync your project.
I had the same issue, and the lint gave me a hand...
If you're using lint, it can help too.
In gradle.build(Module:app) add the lintOptions sub-element in android element as shown below, then lint will fix it for you!!.
android {
lintOptions {
abortOnError false
}
}
I hope it helps!!