I have a problem. After I imported a project in Android Studio, in the activity java files it says "cannot resolve symbols" at certain lines, and they are with red, even though the project was fully valid before. The project has all necessary imports too, but some are with red too. The thing is that gradle build is working fine without errors and app launches in the emulator. I have tried invalidate cache and restart and sync gradle with project files. Do you have any ideas. ?
SOLUTION:
In build.gradle(Module: app) file, update the dependencies and sync.
Related
The project is a generated LibGDX project. It used to work fine, but when I updated to Android Studio Chipmunk, the android module din't work fine anymore. So recently, I've updated to the Dolphin version which I thought could fix the problem. Well, it's still the same:
Error Image
As you can see, the external dependencies aren't detected and causing unresolved symbol errors. The library includes: the 'core' module, libgdx Android backend, and Play Service Ads (Admob).
I've tried rebuilding the project, updating everything that is possible, and tried solving it in the build.gradle file. However, it seems to be a problem in the IDE or me...
The project still builds and runs well, as if there's nothing wrong at all.
How can I fix this problem?
I have a Kotlin Multiplatform Project which contains an android library target. That library is imported to a separate android app project:
// settings.gradle.kts
include ":sharedLib"
project(":sharedLib").projectDir = file("../path/to/sharedLib")
Whenever I sync my app project in Android studio both the app and sharedLib projects sync in parallel. I am pretty sure this is some IDE setting i fluffed up when debugging source resolution with the sharedLib a while back.
Any ideas what AS settings i might have messed up? I actually removed AS and reset the configuration and yet I am dealing with seeing dual syncing.
Turns out it was some config stored in my project's .idea directory. Cleared it and everything is happy again.
For some reason, I am getting an error under my build.gradle file in the side bar. there is no error in the actual code however. what could be causing this and will it affect my app if I want to pull from firestore?
I am using android studio 3.5error screenshot on Mac.
It's normal for that error to be there. Since you're not opening the project as an Android project, but rather as a Flutter project, the IDE tries to identify the build.gradle file on the android folder, even though it doesn't have to do so. You can see that this happens even with a new project if you open that file.
You can just ignore that.
The real errors, if present, will appear when you try to run or build your flutter application.
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!!
I am starting my migration from Eclipse to Android Studio, and start playing with new projects on Studio.
My test project was working fine till I got some errors messages.
I had to do some manipulation (https://stackoverflow.com/a/16876993/327402) to enable the error output to display, and found the issue that I fixed.
Unfortunately, after this "workaround" (Why the hell have I to make such things to see my errors?), I found that there was an error message that I cannot fix:
error: duplicate class: com.mypackage.name.BuildConfig
error: duplicate class: com.mypackage.name.R
I also noticed that I am not the only one to have this issue (see the comment in the SO answer I linked above)
First time, I was able to fix it by enabling "External build" again, but that happened again, because I needed to see the error output and everything is now broken, and I cannot find what happen.
With Eclipse, the R file was easy to find, in the gen folder, but with Android Studio, there are too many files, and I am a little bit lost.
Any idea/suggestion?
I've found a question like this that has some replies here:
Cannot resolve R.java, duplicate class
You can try this:
Delete the Build folder generated by Android Studio automatically
Also you can try to Rebuild project by clicking Build->Rebuild project after deleting build folder.
So, just to let you know...
A few minutes after I posted my question, Google released an update to Android Studio (0.1.5)
See link: https://plus.google.com/+AndroidDevelopers/posts/Y9vhvGaHCbh
Tor Norbye kindly answered my question in this community, and I am sharing here
So the workaround I quoted in the OP is no more mandatory.
Enabling again External build after upgrading Android Sudio let me see the real errors ( a library and some Gradle import that I fixed)
So, I consider the Android Studio upgrade as the best answer to this question...
Ok, I also have the same problem, and this is what worked for me.
I first unticked external build from compiler settings. Then when I compiled i get two errors related to R.java, duplicate class.
Then i delete the build folder manually from finder. Then rebuild it from android studio, but still same error.
Then I again go back to compiler preference and tick the external build setting, and it worked fine after that.
Looks like some bug.
apparently, or at least for me 0.1.5 has a bug and cannot run in external build
because of some path error you can read about here
https://code.google.com/p/android/issues/detail?id=56628
so i switched to internal building, and then i hit the double R symbol bug
after deleting the build path application is compiled without errors but the build folder is not fully rebuilt, I'm missing the R.java file which the internal builder does not make.
i've rebuilt it on the external builder on an unupdated version as a temp workaround while this issues is fixed.
btw if anyone knows how to tell internal gradle to rebuild the build folder please share.
I just had the same problem and found a way to solve it (You can do this with Android Studio open):
Go to you Android Studio projects folder located in c:\users[USERNAME]\AndroidStudioProjects
Locate your project folder and open it.
Delete the folder named build.
From here, enter your application name folder, where you can find another build folder among with libs and src folders and a file named build.gradle.
RENAME the build folder to build2 or something else.
Now in Android Studio go to Build->Rebuild Project.
And after the project was rebuilt, open again the folder where the build2 folder that you renamed is located.
Delete the new folder named build that was created.
Rename your build2 folder to build again.
Done.