I use IntelliJ IDEA 12, Play 2.2.0, I have Scala plugin installed, Play 2.0 support plugin installed.
I created java play application via termina (play new). Andas you can see in this pictures I always get this error: "cannot resolve method ok()" or "cannot resolve symbol at"
http://sluchatka.kvalitne.cz/pics/1.png
http://sluchatka.kvalitne.cz/pics/2.png
I searched the web for this problem the whole day, but I didn't find solution.
Can you please help me?
The first problem (unable to resolve reference to template) is because your template probably has not been compiled by the moment (and thus IDEA does not see compiled template and can't resolve reference to it).
I usually develop Play apps having ~run command launched in Play console. So that any changes to templates are immediately compiled and changes detected by IDEA.
As for the second one it seems like a deficiency in Play IDEA plugin. It does not work seamlessly within templates I should say. Lots of glitches. The best way I found is to have ~run launched so that small problems are detected immediately.
According to intelliJ support it is better to import the command line created play 2 project using the IDE import project wizard instead.
File -> Import Project
Select play2 project location
Import as SBT project
This was due to the "play idea" command being outdated or not fully compatible with the current play 2 and scala plugins for intelliJ.
A bonus is that errors start to appear properly, we had trouble with that earlier.
I was having a similar issue with Play 2.4.2 and Intellij 14.1.4. I could run the basic "play-java" example/starter app in Intellij, even though the editor showed errors like "cannot resolve method ok()".
Here's what solves the problem for me:
Before starting, make sure your project is not open in Intellij.
Delete the ".idea" folder from your existing app, OR just create a new app using "activator new".
On the command line, cd to the app's folder and compile using "activator compile".
In Intellij, File -> Open, and select your app's folder. For the SBT import options, I left the boxes unchecked (e.g. "Use auto-import", "Create directories for empty content roots automatically", etc.) but I don't think it matters.
Once everything finishes loading, you shouldn't see the errors any more.
This click in the Project Structure is your answer.
Related
I am trying out the workflow where you create and maintain your project primarily in Maven, and the Intellij IDEA project files are derived from that, which seems to be the recommended way these days.
My setup: Windows 7, JDK 11, Maven 3.6.0, IDEA Community 2018.2.6, the latter three all fairly fresh installs, not messed around with, verified as working in their own right.
https://maven.apache.org/guides/getting-started/maven-in-five-minutes.html followed steps to create a Hello World project, verified it compiles and runs with Maven after adding the project property entries to specify we are not on Java 5 anymore.
Opened the project in IDEA by opening pom.xml and saying yes, this is a project file.
Opened App.java, and references to String are underlined in red: Cannot resolve symbol 'String'.
Tried invalidate caches / restart, no change.
Consensus as far as I can tell is that maven is the top build system and IDEA is the top IDE, so it must be possible to get them to work together. How?
Open Project Structure (by pressing F4):
Check the SDKs and Problems sections for any error.
I'm using eclipse ADT (most recent version) to develop some android apps. I've followed the getting started tutorial at the dev.android.com and it worked just fine.
But when i tried to create another project with the same targets and sdk's, i've got nothing but errors:
Some errors and my sdk's:
That's the same sdk's i used before these errors started showing up.
What can be causing this?
EDIT: my project won't generate the R.java file
You might need to add a support library to your new project.
Check this link for downloading the support libraries -
http://developer.android.com/tools/support-library/setup.html#download
Please notice that you need to import them into your eclipse and then include one (preferably the newest, not sure about this) in your project.
EDIT:
Before downloading the support libraries you should first check if you have them already.
Try this, right click project folder in the eclipse package explorer, Properties>Android>Library>Add>select a library if you have one.
There might be an invalid library included in your project already, if that happens then you will see it in the Library>Add> menu, remove it and add a new one.
You might have clean your project ........
if yes.....you must check whether R.java file is present in **Project(your project)->gen->package name->R.java**
if not than u have to update Tool Folder in SDK manager
The problem I'm facing is a very simple one...
I can't get IntelliJ IDEA 12 to help me with the creation of an Android application module (project).
After successfully installing IntelliJ IDEA 12 and making acquaintance between the IDE and both SDKs (Java and Android), when I run the "New Module wizard" and choose "Android application module" I receive an error message which states:
"Cannot find resource directory for module < blah >"
The IDE does not hang, or crash but I'm left with a half Android project which does not contain the mandatory file structure of any (straight forward, recommended) Android application.
Amongst other things:
the "res" folder is missing
and so is the activity which the wizard asked me about
and then there's no AndroidManifest.xml
Here's what the IDEA 12 Wizard creates:
and here's what the structure of the project should look like
(in this particular case it's the work of an Eclipse - Android integration
from a colleague's machine):
I've replicated the problem several times and it always happened in the same way.
It looks like something's broken in there and I've looked all over the Internet for an answer before finally deciding to ask this question.
I'm sure that all the required files and folders could be created manually but I would like the IDE to help me with this boilerplate stuff since I'm a beginner with Android development and there may be other things not working, behind the scenes, it this is the symptom.
In other words, I feel it would be very important for the wizard to create a working Hello World project.
Any help would be greatly appreciated.
Remove java*.exe files which in C:\Windows\System32 folder.
It works
I've had the same issue today, but resolved it by moving jdk from c:\program_files\java to c:\home\java and updating the system path to it.
I removed the java*.exe files from C:\Windows\System32 folder and add the JAVA_HOME in the path environment by my jdk path(in my case is C:\Program Files\Java\jdk1.6.0_45)
Eclipse is giving me a few problems.
After a cold start and the loading of android libs, Eclipse underline the import statements or says that java.lang.Object couldn't be found.
Closing it and reopening often fix the problem. If it doesn't, another close-open fix it definitely. But it shows at each cold-start.
It also gives
"The type java.lang.Enum cannot be resolved. It is indirectly referenced from required .class files"
"The project cannot be build until build path errors are resolved"
But if i restart the build path errors and the enum problem are not show any more(sometimes the enum proble got fixed some time after eclipse's loading finished)
"Project 'xxx' is missing required source folder: 'gen' "
that should be generated automatically generated while building, and still restarting will fix them
In addition, in many projects, while building or cleaning, eclipse says that it couldn't delete the bin/. directory. I noticed that that directory is read-only, and if i try to remove the attribute(even from dos), it immediately return to read-only.
This problems aren't show-stoppers, i still can code and i still can get my apps exported, but it is quite annoying to have to restart eclipse a few times before being able to use it(and eclipse isn't that fast at opening), and i would really know how to fix it.
I searched in the net a bit, but i dind't found nothing useful or that worked.
Is there a way to fix them?
I didn't "unistalled"(it is just stored in a directory) Eclipse, since i should then reinstall android sdk, mercurial plugin, and re download and set up a few libraries i use in quite all my project, and i really hope there is another way.
final notes:
everything works when this problems doesn't show: the app works, logcat too, the right device is used to install the app, so i think java and android sdks are installed just right
I had that problem before so I just saved my projects to a different file and uninstalled everything ( java, android sdk, eclipse ). When I reinstalled it all I put the android sdk on the root of my c drive as I have a windows machine and then instead of picking where java was installed I let it do its own thing. I dont use a mercurial plug in but your "read only" problem could be related to that. Its possible your downloading files that are "read only" and there for you have no way to alter them. Im guessing since you said youve been programing you already know how to set the build paths and stuff. It might just be where everything is installed or something silly like privilege settings on your machine.
What were you using the mercurial plug in for anyway? just curious :)
Have you included the java lib in your project or? For a couple of weeks ago I sat with an project where i absolutly needed some of the methods, so because android just have some of the java lib I imported the need libs and used that.
I'm using Eclipse to learn to develop Android applications in Java. I haven't used Eclipse before.
The project I'm trying to use (supplied by OReilly as part of 'Android Application Development') is MJAndroid. When attempting to run the project, the Run fails, and the Problems tab mentions com.java.Object can't be found, and Eclipse asks me to check the build path. Clicking
Properties -> Java Build Path -> Libraries, the message 'Unable to get system library for the project' is displayed.
On a working project, Properties -> Java Build Path -> Libraries has an entry for Android 1.1, which if I click Edit, has the classpath container path of com.android.ide.eclipse.adt.ANDROID_FRAMEWORK.
It seems a simple matter of adding the correct container path to my non-working project. However Eclipse seems determined to make this as difficult as possible. No matter what I chose to add - jars, externals jars, variables, libraries, class folders, external class folders, nothing seems to take the form of 'com.android.ide.eclipse.adt.ANDROID_FRAMEWORK' that the 'Android 1.1' entry on the working app has.
How can I add this namespace to my project so it resembles the working one?
I'm quite sure it's a problem with Eclipse's somewhat odd user interface. Frankly there' nothing I'd prefer more than a file to modify and set such information - my background is in Python, and the whole eclipse environment seems an unnecessary burden.
I had faced the same issue when I imported a sample code downloaded from the internet. I am using android sdk 1.5 with 0.9 ADT plugins. Here is a simpler way to fix the andoid library reference issues
Right click on the project which has
issues and select properties
Select the appropriate Android build
(1.1, 1.5 or 1.5 with google api) and
say ok
Again right click on the project and
select "Android Tools > Fix Project
Properties"
Fix the imports once (if required)
Refresh the project and you should be
ready to go without any manual
editing
I faced this same problem after importing a project through GIT. The problem was that I didn't have the same target android platform installed, and the build path somehow got corrupted.
The first obvious thing i did was changing the target sdk in the project.properties, but even after cleaning up the project and Android Tools > Fix Project Properties, it didn't help and I was still getting the build error.
My solution after wasting close to 1 hour trying to figure this out?
RESTART ECLIPSE
Everything worked fine after that. Eclipse is pretty fickle. Only through years of experience you'll then understand her well. :)
Had the same problem and it turns out the Android SDK Location was not set which was a really simple fix. Go to Window->Preferences, click on 'Android' on the left hand menu, fill in the location of the Android SDK (e.g. C:\Program Files\Android\android-sdk) and click OK. Everything worked fine for me after that.
Found the answer in this set up guide: http://developer.motorola.com/docstools/library/Installing-Android-Dev-Environment/
Sometimes Eclipse can get a bit funny (technical term) with classpath container resolution.
You have a working project in your workspace, so you can rule out plugin installation issues. You could try opening the .classpath file (hidden by default, select the triangle in the top-right of the Package Explorer view, select Filters... and uncheck .* resources) and manually adding the container declaration.
`<classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/>`
You may then have to close the project and open it again (right-click->Close Project) before Eclipse recognises the change.
You may also find that there is an Android builder and/or nature. If you compare the .project files for the working and non-working versions you may see entries for Android builders/natures. Copying the relevant entries may resolve the issue.
sometimes, eclipse can help you.
In Android projects, click right button on the project-> Android Tools -> Fix Project Properties.
It's usefull in class path errors!!
Luck!
I would verify you have the correct version of Java installed as well as the Android SDK. I would recommend installing/reinstalling the ADT plugin in your eclipse, makes it alot easier to create the android project.
http://developer.android.com/sdk/1.5_r2/installing.html
Also. I guess the path of the Android SDK must be setup correctly. This happened when I was overloaded with projects and I decided to create a new workspace copying some existing stuff into it.
Seems that the new workspace requires you to setup these details too once again
Is that setup properly?