Related
I came across a Maven project which has Groovy files in it. Those Groovy files were not getting recognized during initial compilation. So, I added groovy libraries in build path.
Due to that, when autobuild is triggered it shows the following error window:
Also, I am not able to decompile the dependent jars and all the projects went into error state.
I tried restarting my eclipse and it asked me to install the following plugins:
When I click on install, it prompts me the following error window:
I am not sure if reverting back all my changes of adding Groovy libraries is a good idea! Any leads on handling this situation will be appreciated.
It sounds like you added the Groovy Development Tools to eclipse. GDT patches the Java Development Tools (and provides LanguageSupportFactory class mentioned above). If you use the incorrect version of GDT to patch JDT, eclipse can end up in a very bad state.
I recommend looking at Help > About Eclipse Platform > Installation Details > Installation History. You can revert to a previous state where GDT was not installed. If you want to add back GDT, be sure you use the update site that matches the version of eclipse you are using.
I know that it has been asked thousands of times, but I really can't fix this at this momment. I'm trying to update an old project(already submitet to the play store). The only dependency was the v7 appcompact lybrary and so I added it to the new workspace and updated the existing project dep[endencie, but I'm still getting the strange R cannot be resolved to a variable error.
Here is what I'm doing and even if I'm 99% sure that it is what I have to do, it's not working.
Updating the project dependencie:
everything looks nice, but when I clean and rebuild the project, here is what happens:
and the problem is still there. I'm really going to start crying, because it was a working project, buta after switching to a new workspace and checking it out from my git repository, I can't get it working.
Do you have an idea what is going on? I know that I miss something small here, I know that it has been asked so many times, but I can't find an answer fitting on my case.
Remove library project android-support-v7-appcompact and add it again properly.
also check your package name in manifest file.
update SDK Build Tools on SDK Tools -> SDK Platform Tools, if not, please try it and clean & rebuild.
check imports to see any broken R.java imports. if there is "import android.R;" remove it.
check style and layout xmls to prevent any missing drawables or depreciates.
also see : R cannot be resolved - Android error
Just to tell my experience with this problem in a Java project with JDK8. In my case I was running the project in a Mac with Yosemite. Reading the specs. Android Studio and SDK, I've found that projects could be compiled up to Yosemite version.
I changed my environment variables to JDK7 and it worked!
I know this question has been asked before and I have seen a plethora of solutions out there, yet none seem to work for me. I was able to build my apk without issues until this error started cropping up. I have tried cleaning my project, removing it from the workspace and reimporting it, removing "Java Builder" from my Builders for the project, building the project manually, reordering my java build path. I have no visible compiler issues and no problems exist in my workspace.
I did experience this issue before and solved it once by removing the project form my workspace and re-importing it and another time I solved it by removing "Java Builder" from my java build path. None seem to work this time. I currently have most of the settings set back to default (i.e. java build is checked again).
I am running windows 7 (64 bit) and using jdk1.6.0_21 via Eclipse 3.6.
Any suggestions would be greatly appreciated as I have lost loads of development time troubleshooting this already.
[Update] My locale is English & I have tried removing the debug.keystore, United States as related to issue 834
Please follow these steps; this might help you out:
Right-click your app project and go to Properties
Select Android from left-hand side list
Uncheck the "Is Library" checkbox
If your app project relies on library projects which are in your workspace, those of course need to have the "Is Library" box checked.
deleting the R.Java file in /Gen folder did the trick for me
I tried all the above solutions. but it didn't work.
The solution was to restart eclipse !!!!!!!
hope this will help someone :)
In my case this problem started after eclipse updated the plugin with the v4.0 API release. I fixed it by going to the main preferences for Eclipse and under Android->Build uncheck 'Skip packaging and dexing until export or launch'
Note: if you eclipse gives you the Unknown Command 'crunch' error then follow this post
I've tried to gather the best of other peoples answers into a step by step list of things to try in order:
Check the project is not set as a library:
Go to Project->Properties
Select Android from left-hand side list
Uncheck the "Is Library" checkbox
Clean and rebuild the project - this should delete and recreate the entire gen folder, including the R.java file mentioned in some peoples answers
Check eclipse and all the Android plugins are up to date
Close the project, exit Eclipse, reopen eclipse, reopen the project.
Go to Java Build Path > Projects and check for any incorrect project dependencies
Go to the main preferences for Eclipse and under Android->Build uncheck 'Skip packaging and dexing until export or launch'
Check JAVA_HOME is set correctly. Follow the steps in this article
If you complete the above list, and still haven't solved the issue, please leave a comment, or if you find something else that works, feel free to edit the answer and add your thing in.
Delete the project from your workspace & import again.
This worked for me.
Can't believe similar issue has been there since 2008.
http://code.google.com/p/android/issues/detail?id=834.
i'm no expert, but eclipse on Windows, doing android apps, refuses to create the default.properties file (in the app root directory). I've just copied one from another app and it works fine. Simple contents, for Android 2.2 project it just says (ignoring comments):
target=android-8
fwiw
I was having the same issue as the OP except that all these suggestions did not work. I found a solution for me.
Make sure that "Skip packaging and dexing until export or launch." is selected.
Go to Window -> Preferences -> Android -> Build. Just make sure that option is selected and apply.
I know this does not make a lot of sense, but having it unselected was giving me this error and with it selected it goes away and the apk is installed.
I am using the auto generated ant build script from android and ONLY using it as my build process in eclipse. I am not using any other build methods.
I figured it out. I was referencing JavaSE-1.5 and using JDK 1.6. I changed it to use 1.6 and that appears to fix it.
Seems like through my research that is an overloaded error message that covers a lot of error cases.
I just fixed this by reselecting a default JRE for the execution environment (JRE6 for JavaSE-1.6 in my case). It got unchecked for some reason.
This fixed my problem. I kept getting the console error in eclipse "Could not find com_android_vending_licensing.apk" and even though it didnt seem to effect the way my app ran, it was annoying. So going into the com_android_vending_licensing project properties and unchecking the "is library" option, building the project to produce the needed apk and then going back into the com_android_vending_licensing project properties and re checking the "is library" check box fixed the problem.
Run Eclipse as "Administrator" and then import the project.
None of these things worked for me. I'm trying to access native code through the jni, first with NDK samples. What I found was the build won't run if jarlist.cache is not present in the project bin directory. If I copy one from another project to that location (may need to refresh to see the folder in Eclipse), build works every time.
Clean the project and it will do. Sometimes it happens unknowingly but keep trying to solve using diff methods.
I had somehow done a Run configuration as a Java application instead of a Android.
the problem for me was I was trying to use IBM RAD which appears to not work properly for this, I installed Eclipse and now have a different error but I should be able to get past it
On my machine (Windows7, 64bit) I could fix this by setting my execution environment to a 32bit variant of the jdk (I used 1.6.0_23). And I tried a lot of things before...
SHA1's answer did it for me: after updating to the latest sdk/adt, my project refused to build an apk; unchecking the option resolved the issue.
I don't know if the update checked this, or if it was checked before but the new adt screwed things up, but things work again now :)
In my case this worked :
Delete R.Java file in /Gen folder
+
Delete all "R.Android" imports that Eclipse added to some of my java classes !!!
and rebuild the project.
remove -- R.java -- Clean the project and run again.. this worked for me ..
Find the project's folder in your system, enter it's Properties via context menu and deselect "Read only" option. Worked in my case.
This seems to be the source of the problem in many cases, moreover some solutions up there base on copying/rewriting the files in the project what makes them non-read-only.
This is caused by JAVA_HOME not being set correctly. It can be easily resolved by following the steps in this article.
Mine was caused by this problem (incompatibility between ADT and SDK), and was fixed thus:
Eclipse > Help
Install New Software
Add 'https://dl-ssl.google.com/android/eclipse/' to 'Work With'
section and press enter
After developer tools appears on the list, check it and click Next
Restart eclipse once download is finished
I my case, I had to switch from API 21 to API 19, clean and build and everything was fine again. I am using a Mac and apparently API 21 is not fully supported on Yosemite.
I am currently developing an application with my software engineering classmates. I am experiencing a few issues with Eclipse, however. But first, some information about my Eclipse: I am running version: Juno Service Release 2 with a build id of 20130225-0426. I am running Eclipse on my MacBook with OS X Mountain Lion 10.7.5. I am using SVN to upload and download the project to a repository through assembla.com.
First, Eclipse will not recognize any errors. If I purposely type random characters, Eclipse does not underline them with red.
Next, whenever I type "this.whatever" or "# for javadoc" I receive the following message: "this compilation unit is not on the build path of a Java project." I can click "OK" and continue with no problem though.
Finally, whenever I attempt to run the program I receive this message:"The selection cannot be launched, and there are no recent launches."
Other notes: I do not have any of these issues with any of my other projects in my workspace. I also have another project using the assembla repository that does not contain these issues. These issues just occurred all of the sudden.
Edit: None of the other members in my group are experiencing these issues. I have attempted to download the project from the repository on a different machine and I still have these problems. I have attempted to delete the project from my workspace and re-download. Still a no go.
Update: I even installed the Android Development Kit and used the included copy of Eclipse. It will still not work properly.
What is going on with my Eclipse?
Since I guess you're in start phase of android coding and you're not addicted to a special IDE, I strongly recommend the IntelliJ IDEA instead of Eclipse for Android development. I have tried Eclipse already and because of its weaknesses, now I'm using IntelliJ. Eclipse is not the best IDE for Android development and have a long way to become the one.
IntelliJ IDEA
I suggest you try installing the ADT bundle in a new location and see if you still have these problems. The ADT bundle includes the latest Android SDK along with a version of Eclipse with the ADT (the Android Developer Tools plugin) already installed and configured. It's possible that you have (or have had in the past) other Eclipse plugins that affect how the Java tools in Eclipse work, possibly in a way that interferes with ADT. I have personally had problems like this in the past with tools like Aptana, where even after uninstalling there would be problems.
Eclipse is telling you already with the above error message: You don't have your sources on a build path, but just in some folder.
Either you have created a simple project instead of a Java project, which then also doesn't do anything Java specific. Or you have created your Java files in plain folders, instead of source folders.
The best way to sort this out is to create a new Java project using the Eclipse "New..." wizard from the main menu. Compare the result of that to your project. The two important things are: The project has an icon with a small "J" overlayed. The Java sources are shown in packages, which themself are in source folders (with a package overlay), not in simple folders.
This question already has answers here:
Developing for Android in Eclipse: R.java not regenerating
(64 answers)
Closed 9 years ago.
Did a fresh install of Eclipse, JDK and android-sdk.
I am currently receiving this error when creating a new project
[2010-09-26 16:07:56 - Test] ERROR: Unable to open class file C:\workspace\Test\gen\com\example\test\R.java: No such file or directory
What's the reason for this and how do I fix it?
Eclipse Helios 32 bit
java version "1.6.0_21"
Android sdk API 8
P.S. I'm new to Android development.
EDIT: I tried most of your solutions, but nothing worked. So I started using my friend's install of Eclipse Ganymede.
I have had same issue, all what I needed to do, was create project and restart eclipse.
//Edit: Complete collapsing of "Package" tree works as well.
This is a mighty annoying error.
It happens 100% of the time when I create a new android project.
What seems to work for me is to just delete the file (which DOES exist and is accessible by my user), then hit build, and it will regenerate it and stop moaning.
It's clearly a bug as there are too many people getting it simply by filling in the boxes in the new project dialog (like me) without even modifying any code!
Have a look at your console. It is an aapt aborted error. Since aapt is the tool that auto-generates R.java, therefore, R.java was not getting generated.
Since R.java is a auto-generated file that stores information about your drawables you should rebuild your project. Before that have a look at your layout xml files and check them for errors.
Notice that Project -> Build All should be selected. Also try to run your project.
Removing Read Only attribute on Eclipse workspace directory and Project->Clean->Build Project
did the trick for me. I then clicked on the project directory from within Eclipse and did a F5 (Refresh) . R.java was generated in the gen folder.
I had a similar error on the creation of new projects myself. After messing around I tried moving the R.Java file into the same location as my projects java file (the src file). Eclipse then saw I removed the R.Java file from its location and created another and that seemed to clean up the error.....I dont know if it was because eclipse rebuilt the file and then saw it or what but that seemed to work for now.
After creating the Project, Right click the Project Folder within the Project Explorer on the Left Tab of Eclipse.
Click on Source->Format.
The Console will say:
[2010-11-24 11:57:42 - YourProject] R.java was modified manually! Reverting to generated version!
Then you're good to go. Try running your Project and it will compile.
Check your imports. If this has sneaked in, then delete it.
import android.R;
Had a almost identical issue with Eclipse Helios 64 bit on Linux, but I had the "1.6.0" API selected like you. The bizarre thing was I could type;
cat <the path it was moaning about>
in a console it would display correctly.
I created a new AVD which used Android 2.1, the issue magically vanished. Perhaps it's a bug in Android SDK or Eclipse?
Right click on your project name in package explorer. Then click 'Validate'. It will be fine.
Here is how to fix it:
Go to your "workspace" folder and make sure it's not "read-only"
Eclipse Menu > Projects > clean
Had the same issue.I was able to solve it by doing the following:
go to Window/Preferences/Java/Build Path
select 'Folders' and change the output folder to 'gen' (this is where Android looks for the generated java files,but the default in eclipse is 'bin').
restart Eclipse
Windows 7,Eclipse 3.5.2
Configure buildpath.. check android , it worked, of course i followed one of the posts mentioned above window, preferences, java, java build path and selected project,
then created a project, and tried to build same error, then i checked build path and saw android is unchecked, checked it and build again, it works!
I had this exact same problem with no helpful errors. finally, I tried deleting my debug keystore and it worked:
rm ~/.android/debug.keystore
I had seen people mention that, but I figured it wasn't my problem because I wasn't getting any errors relating to the debug keystore. I found the answer here:
"Debug certificate expired" error in Eclipse Android plugins
apparently the debug keystore is only valid for one year.
I would say that once you have created your project and you've mention the R.class error --> just restart the Eclipse IDE and everything will be fine ;)
1.-Open Eclipse
2.-Open Window/Preference
3.-Expand JAVA option
4.-Select Build Path
5.-Check the option "Projec"t and uncheck "folder" options
6.-Click on OK
7.-Restart eclipse IDE
Let's go to code !!
This problem can be solved by merely cleaning and rebuilding the project. How ever there is a link to the latest version of Eclipse for Android.
**Eclipse Java EE IDE for Web Developers.
Build id: 20100218-1602
(c) Copyright Eclipse contributors and others 2005, 2009. All rights reserved.
Visit http://www.eclipse.org/webtools**
Here is a link to Android Tutorial with Eclipse
http://developer.android.com/resources/tutorials/hello-world.html
In mac,
I select Project>Clean
after that, i unchecked Build Automatically
then i run the project and it works :)
Windows 7 64bit, run eclipse as administrator, solved the problem for me.
In my case there was no gen folder after pressing clear...
To solve it, i created a new gen file, then when to Build Path => Configure Path, and pressed ok.
All went smooth after that :-)
Following steps are done as solutions:
1. Collapse the project tree structure
2. Go to the workspace and remove the readonly permission of the workspace.
3. right click "default.properties" and go to properties and uncheck the readonly permission in eclipse.( this is done when the workspace shows build error even though there are no compilation issues)