I meet the problem Cannot resolve symbol AppCompatActivity
I solved the problem by deleting .idea folder and syncing project with gradle files by the acticle Cannot resolve symbol AppCompatActivity - Support v7 libraries aren't recognized?
Could tell me what .idea folder is ? Why can I delete it and sync ?
.idea folder is storing the settings for your IDE (Development Environment) - so the settings of Android Studio how to visualize your project.
You can check more about .idea folder here
The .idea folder (hidden on OS X) in the solution root contains IntelliJ's project specific settings files. These include per-project details such as VCS mapping and run and debug configurations, as well as per-user details, such as currently open files, navigation history and currently selected configuration.
Some files should be committed to source control, some should be excluded.
See here: https://rider-support.jetbrains.com/hc/en-us/articles/207097529-What-is-the-idea-folder-
It stores project specific settings that pertain to AndroidStudio. It is called .idea because AndroidStudio is derived from JetBrains' Intellij IDEA. Most if not all IDEs in this family create such a directory. For example, JetBrains' Rider, an IDE for writing .NET applications, also creates such a directory.
Basically it is for project scoped IDE configuration.
Related
In Eclipse, I had some folders in the project root that were not code - containing text files with notes about the project, Photoshop files for artwork and so on. Having migrated to Android Studio, these extra folders in the project root are not visible in the Project navigation pane - I only see the app folder and Gradle Scripts.
Is there some way to create a non-code folder that is visible in the Project pane but that is outside the app module?
I thought "Create New Module" in the Project Structure dialogue might do it, but it only offers me templates for modules that contain Android code.
--- EDIT ---
Thanks to #SvdTweel's answer I've stumbled across something that seems to do what I want:
switch to the Project view
create the documentation folder in the project root
right-click it and select Mark Directory as>Resources Root
switch back to the Android view and you see a new folder named "resources"
Will this have any adverse effects? Is this folder still ignored when building the app module?
In the Project Structure you can switch from Android to Project.
The default Android view structures and minimalizes the directories and files so that you as a developer can easier navigate through your project.
The Project view shows everything just as you would see when you browse it with your file explorer on your OS.
I think that is what you search for to create files and directories in the root of the project.
You can put the doc files in the test/resources folder. This is clumsy, but it makes them visible in the Android view while keeping them out of the build.
Bonus: code completion when editing Markdown code samples using the JetBrains Markdown plugin.
I've marked certain directories & files as excluded in Android studio. I'm looking for the file where intellij/Android Studio keeps track of those configurations.
It used to be inside the .iml file however I don't see that file in my project or new projects anymore. I couldn't find this info in files under .idea directory either.
Does someone know where can I find this configuration file?
This information is stored in .uml file of the module. See
What are .iml files in Android Studio project? I read that it is configuration file for modules. I do not understand how it works, and can't I just use gradle scripts to integrate with external modules that you add to your project.
Also, most of the time AS generates them, so I cannot control project behaviour. If I have a team that works in different IDEs like Eclipse and AS, is it possible to setup my project so it's IDE agnostic?
I don't fully understand how this system works.
What are iml files in Android Studio project?
A Google search on iml file turns up:
IML is a module file created by IntelliJ IDEA, an IDE used to develop Java applications. It stores information about a development module, which may be a Java, Plugin, Android, or Maven component; saves the module paths, dependencies, and other settings.
(from this page)
why not to use gradle scripts to integrate with external modules that you add to your project.
You do "use gradle scripts to integrate with external modules", or your own modules.
However, Gradle is not IntelliJ IDEA's native project model — that is separate, held in .iml files and the metadata in .idea/ directories. In Android Studio, that stuff is largely generated out of the Gradle build scripts, which is why you are sometimes prompted to "sync project with Gradle files" when you change files like build.gradle. This is also why you don't bother putting .iml files or .idea/ in version control, as their contents will be regenerated.
If I have a team that work in different IDE's like Eclipse and AS how to make project IDE agnostic?
To a large extent, you can't.
You are welcome to have an Android project that uses the Eclipse-style directory structure (e.g., resources and manifest in the project root directory). You can teach Gradle, via build.gradle, how to find files in that structure. However, other metadata (compileSdkVersion, dependencies, etc.) will not be nearly as easily replicated.
Other alternatives include:
Move everybody over to another build system, like Maven, that is equally integrated (or not, depending upon your perspective) to both Eclipse and Android Studio
Hope that Andmore takes off soon, so that perhaps you can have an Eclipse IDE that can build Android projects from Gradle build scripts
Have everyone use one IDE
Add .idea and *.iml to .gitignore, you don't need those files to successfully import and compile the project.
They are project files, that hold the module information and meta data.
Just add *.iml to .gitignore.
In Android Studio: Press CTRL + F9 to rebuild your project. The missing *.iml files will be generated.
Those files are created and used by Android Studio editor.
You don't need to check in those files to version control.
Git uses .gitignore file, that contains list of files and directories, to know the list of files and directories that don't need to be checked in.
Android studio automatically creates .gitingnore files listing all files and directories which don't need to be checked in to any version control.
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!!
In Visual Studio 2012, I am using a Xamarin.iOS project type and when I add components to a project, they're added to the folder: [Solution-directory]/Components/[component-name]/
Is it possible to choose where the components are stored?
My dependency management strategy is to store the dependencies outside of the project and solution area in their own folder.
I guess I could rip out the DLL from the /lib/ folder within the component directory, but I am wondering if there is an easier solution.
You can specify the components directory with a components.config file. This is detailed here regarding Xamarin Studio, but I just tested this myself by having it in the root of the solution directory, and it did work.