When I try to run my Android project(which was working fine yesterday) I get the "Your project contains errors, please fix them before running your application" dialog. But my project has no errors. I've had this problem before, and the solution was always to Clean the project, but this time it isn't helping. The red X icon disappears from the project in the workspace, then reappears when I try to run it. Also restarted Eclipse so it rebuilds the project. Help?
Go to your .android folder and delete your debug certificate. In my computer it is in this path
E:\Users\blessan\.android
Inside that there is a file name 'debug.keystore'. Delete that,clean and try to build the project again. Sometimes this error is caused when the certificate expires.
There are a couple of reasons as to why this might happen. Give these problems / solutions a try.
Problem with your Manifest. These don't always show up, so give your Manifest a thorough check.
Suddenly missing / moved libraries or other dependencies. Right click your project, choose Properties and check the tabs under Java Build Path. When you accidentally remove / move a library file, or any other file the app is dependent on, it can cause an error like this without showing up as an actual error. However in the Build Path screen it will show with a little error sign.
Problems with your R.java. I had an issue with this before where there was a corrupt value in the R.java file. "cleaning" the project didn't fix it, but forcing Eclipse to rebuild the file due to me erasing it manually did.
Problem with a cached version of your app. This one is a real pain cause there are no pointers for it, but sometimes for some reason Eclipse decides to mess with a cached version of your app. This can cause anything from apps not working to apps showing images that have long been replaced by other ones or have been deleted entirely.
If the other fixes don't work, try navigating to your project folder and removing the /bin folder. After that, rebuild the project and try to run it.
I hope one of these works out for you.
This problem is occur some time when you replace new debug.keystore file with the old one.
delete deug.keystore may fix the problem
Related
I updated tools in my Eclipse first by going to Help->Check For Updates and installing everything i that it suggested. Then by going to Window->Android SDK Manager and updating multiple things including my SDK version.
After I have finished my update all my Android projects got a nice red box with an x inside it. I explored the projects and noticed that none of them had any errors inside the project just the project itself had the error icon. I searched online and i found that other people had similar problems. So i thought i found the solution. Alas after cleaning and building the project I got additional error icons next to multiple java files in my projects. Eclipse cannot locate the automatically generated R files when it tries to import them and all the imports are selected red.
I tried deleting the whole content of .android directory (starting with specific few files then the whole content) but that did not bring desired results.
So i have deleted the newly generated files and restored all the old ones.
When I clean and build the projects again all the errors disappear but only until I try to run the project again and then same error appears:
Your project contains error(s), please fix it before running it.
I have also found a related question. It claims that there must be a problem with my xml files. I did not modify any of my xml files since updating the tools so I dont know what could cause them to have errors.
Any ideas as to what is going on??
I've found that eclipse is now picking up errors that it didn't pick up before, because they updated lint, you may have to check all your files and see if there is an error because of this, if it doesn't work try removing Android from the build and reattach it, clean the project, build project, make sure the activities are using the right R files and check what lint says, its like a little square with a tick in it I think.
I had exactly the same problem, solved by removing any imports of R in my code and then cleaning the project
Strangest thing just happened. Even though I have done this 2 times before I have again deleted all my files in .android folder exited my Eclipse and opened it back up again. All the errors were gone and most of my projects work correctly. I have spend a lot of time on this problem and i dont know how it got resolved but Im glad its working again.
Every time I open Eclipse, I get the following error messages:
Android SDK Content Loader:
parseSdkContent failed java.lang.NullPointerException
Initializing Java Tooling
An internal error occured during: "Initializing Java Tooling". java.lang.NullPointerException
Loading data for Android 2.2
Parsing Data for android-8 failed java.lang.NullPointerException
Loading data for Android 2.3.3
Parsing Data for android-10 failed java.lang.NullPointerException
Loading data for Google APIs (Google Inc.)
Parsing Data for Google Inc.: Google APIs:8 failed java.lang.NullPointerException
See link for screenshot:
http://i.stack.imgur.com/lhhQQ.png
(I am using OS X Lion, and Eclipse Helios)
First i read some posts saying that it was the AVD.ini file in the .android profile that was causing the trouble. I tried deleting all the entire .android profile folder as suggested in Android SDK Content Loader failing with NullPointerException. This didn't correct my problem.
I tried deleting the entire Android SDK folder, downloaded it again and installed a couple of Android versions through it. Still the same error messages...
To ensure that I didn't have any old plugins or something that were the issue, I uninstalled eclipse, downloaded it again and installed the Android plugin again. (So the plugin is up to date).
When I go into one of my Android projects, I get error messages on places where I acces resources by using the R file. Regular Java projects work fine, but all Android projects gets small red boxes with white crosses on them. I have been searching for a solution to this problem since yesterday, but at this point I'm completely qlueless and would appreciate any help I can get!
Close all open projects and exit Eclipse. Now you can open Eclipse without getting the error. Start opening your projects one by one to find which one causes the problem. This is most likely because you deleted a Device profile inside the AVD manager.
Do not delete all the full .metadata
Backup .metadata
delete only .metadata/.plugins/org.eclipse.core.resources/.project
restart eclipse
Observation : the projects folders are created
Further - if you are using svn/git/hg have code repository links it would be destroyed, so to reinstate
close eclipse
copy relevant projects from backup to merge with current projects in .metadata/.plugins/org.eclipse.core.resources/.project
restart eclipse
Downfall - sporadic fail error may occur (sync or something) - harmless
backagain
I encountered exactly the same issue this morning. This is a workspace related issue.
Solution 1
I looked into my .metadata and read .bak_number.log files . Some layouts failed to parse and my projects were out of sync with the file system.
So I deleted all the .bak_number.log files. Relaunch Eclipse and the whole worskspace should work again the way you left previously.
Solution 2
However if it's not due to out of sync with the file system. Change the workspace then import all the eclipse projects from the previous workspace.
Thanks the project.properties files , the dependencies are still kept.
PS : I should return to IntelliJ :)
first close your Eclipse
Go to your workspace and rename .metadata to tushmetadata and go to
tushmetadata- >.plugins -> org.eclipse.core.runtime -> .settings
and copy all files from it.
now open the Eclipse and go to your workspace there you can see the
newly generated .metadata folder in that go to .plugins ->
org.eclipse.core.runtime -> .settings and paste here and do not
overwrite any file.
Try to "Hello World" project and run it.
Try to delete file .metadata from your android workspace folder. .Metadata folder contains all configuration files for eclipse. It works for me.
Your answers might be right. What I did was to change my workspace. I redownloaded the project I was going to work on from git, and reimported it. Now it works fine :) Maybe there was some files in this project that made the error messages apear? Dunno....
I have remove the .metadata folder but after it, when I run the eclipse, I cannot creates any Android project. To solve it, I have done the follow:
Go to the main work directory of eclipse
Localize the folder com.android.ide.eclipse.adt It should be in .oldMetadata/.plugins/
Copy it to the new eclipse configuration: .metadata/plugins/
See the full solution here:
http://www.jiahaoliuliu.com/2011/06/running-android-sdk-in-eclipse-errors.html#solution4
For me, the source of the NullPointerException problem was a host-side Junit test project that references (and tests) code from an Android project. It didn't have a project.properties file. It's not an Android project, but for some reason the newer versions of the SDK somehow expects the file there. To fix the problem, I just copied a project.properties file from an Android project to the host unit test project.
When I met this problem about a year ago, I had some projects in my workspace that needed a specific Android SDK level (let's say 2.1) and i didn't have it installed in the Android SDK.
slott's answer helped a lot. Deleting the .metadata or reinstalling eclipse didn't though. The trick was to isolate the project causing the problem, delete its .settings folder and .project file and reimport it.
I discovered another cause, where I'd added a space character into an otherwise blank line in the project.properties file. When I eventually ran android update project -p .
the program (android.exe) threw a NPE exception. When I deleted the space from the blank line the android update project command worked and eclipse started behaving (after running clean a few times).
This happened with r20 of the Android SDK on a Windows 7 64-bit machine.
FYI my change that fixed the problem in project.properties is public at http://code.google.com/p/android-daisy-epub-reader/source/detail?r=517
This is just weired.
In my case when I took a subversion update, I was getting this problem. The reason was the corruption of my project.properties file (due to subversion conflict).
I just corrected the file and problem got solved.
I found it's just missing project.properties file in the project folder. After copying one from another project the error is gone. The only valid line in project.properties is
target=android-8
If you are using SVN or GIT please check whether the project.properties has conflicts or not.
Sometimes project can not be open because of this.
I hope this is useful to someone and saves his/her time: My colleague was facing same issue and we did almost everything mentioned here, with no luck. In the end we changed the Android SDK version in the manifest file and it worked.
This solution worked for me.
Close Eclipse and delete all .markers inside your workspace folder.
Restart Eclipse (once I had to restart it twice, it hang on the first but worked on the second for no aparent reason).
Of course, it's always safe to back them up first.
It is stuck in cleaning output folder for “Project”. It is not always the same Project. So is there some workaround ?
I tried the method of cleaning the project, but the library update happens too fast. I even assigned a custom keyboard shortcut to Clean and I still couldn't get it in there before it started.
I really didn't want to delete the .metadata folder because it is a pain in the arse to lose your workspace settings/preferences/setup.
So I tried:
Make a copy of the .metadata folder
Delete the original
Launch eclipse (it will open with a default/reset workspace), but it will open fine.
Quit eclipse
Delete the new .metadata folder
Make another copy of your original copy and rename it .metadata (basically put the original back)
Eclipse should now launch fine. In my case the Android Library Update still ran but it actually finished within a few seconds instead of hanging.
Then for me the underlying issue was one of my library projects got into a really broken state. I went into the properties for it, unchecked isLibrary in the Android tab and then refreshed the project. Afterwards I turned the library flag back on and did a clean.
I also had a build error in the library code that had to be fixed.
Any how, hopefully that helps if you find yourself in a similar position. Good luck!
So while I asked this question I found workaround for me , and possibly for others. You have to kill eclipse and on next start , do clean up on all projects before eclipse start that “Android Library Update” task and it will not stuck eclipse.
Deleting the .metadata folder works to get Eclipse back up and running, but after importing Android projects into the workspace the problem came right back for me.
In my case the underlying cause turned out to be the "Android Library Task" being stuck on trying to access the network. I'm connecting to the network via a proxy, and despite being configured in the global OS network settings and all other applications working fine, Eclipse was still unable to access the network. The only thing that worked was, after deleting the .metadata folder to get Eclipse running, manually entering the proxy configuration in "Preferences->General->Network Connections" to match that of the OS network settings.
Now the "Android Library Update" takes a second on startup instead of getting stuck.
In my case the other mentioned methods did not work for me
but "Reinstalling Eclipse and its all plugins" related to my project did.
After doing that it came to the normal state.
My env;
Eclipse Juno (under OS X Mountain Lion)
GWT
ADT
SVN
Another trick that works is to kill Eclipse, delete the ".metadata" folder from your workspace and restart Eclipse.
It'll force your workspace back to its initial state and clear up any hung conditions.
Since installing Eclipse 4.2 I have had to resolve this problem twice. The second time I knew that the only thing that worked for me was to create a new workspace and import the projects from the "broken" workspace. It is very fast and is a good opportunity to de-clutter by leaving obsolete projects behind.
Specifically,
choose File/Switch Workspace/other and put in the name of your new workspace.
Then right click in the Package explorer of the new workspace and choose Import and select Existing Android Code into Workspace.
Then browse to the root of a project that you wish to import and also select Copy projects into workspace.
Hit Finish.
You will have to do the same for any projects that this project is dependent on such as google-play-services.
Recently experienced this, caused by an Annotation Processor throwing an uncaught exception. Killed Eclipse, removed references to the offending Annotation from one project .java file, and started successfully.
In my case, within Eclipse, I had set up a C/C++ Builder to invoke build_native.sh, which is needed to build cocos2d-x. Interestingly, the Android Library Update indicated that it was invoking build_native.sh ! For me this explains why it was taking so long sometimes and seemed to be taking a LONG time to finish. I basically replaced this with an echo command. echo "do nothing" and I think this resolved the hanging issue.
This seems pretty goofy to me -- AFAIK, there's no way to configure 'Android Library Update', and I'm not sure why it's doing what it's doing, since Eclipse has a number of build options which the user can manually control.
have an odd one..
Using Eclipse Juno, and everything was working fine for the last couple months. At some point yesterday, while Eclipse was cleaning my project, something crashed - popped up the Windows error reporting. (Didn't catch the name of what crashed..)
Now, I have no R.java class in /gen, and nothing I've tried will generate it. On top of that, when doing a clean rebuild of the project, the Output window remains blank. (No errors, no status message.. nothing.)
Tried just about everything - including the latest which included reinstalling Eclipse and then ADT. Still hadn't helped. (I have NOT tried clearing the workspace metadata yet, will do that soon.)
Any thoughts on what else to check?
--Fox.
Edit: Updating a random file - either .java or an XML layout/drawable does not have any effect, still nothing. Also, removing saved preferences from workspace .metdata data didn't have an effect either.
Edit 2: Okay - not sure WHY it was happening, but creating a new project and the issue was corrected.
So somehow either the project settings (.settings or project.settings) must have gotten corrupted. I have the origianl project still, and am curious to see why it happened, but creating a new project and copying sources and resources over, and no more issue.
Thanks to all that offered comments - goes to show that any kind of little corruption can cause strange things to happen.
The reason in 99% of the cases is that you are missspelling something in some xml file.
The R class file won't appear until all xml files are correct.
I suggest look carefully into your XMLs for a very small syntax error.
Or try taking off 1 by 1, until you figure it out wich one is the problematic.
:) kind of annoying, i know.
If you don't have any errors in your xml files, you tried to reboot your eclipse, your emulator, then open the sdk manager and apply all update. My R have finally been generated.
I found this happened after updating my Android SDK Manager and related eclipse plugins. I am running in Ubuntu, and it would not let me update the plugins unless I ran as the root user (using "sudo eclipse")
This left some of the Android SDK Manager items, and the eclipse plugins, owned by root. This stopped the "clean" working on the project - it must have been something that had been added as the root user, and not accessible as my normal user.
I had to "chown" my eclipse directory and my Android SDK Manager directory so it was owned again by my normal user:
cd /home/myacct/android-sdk/
chown -R myacct:myacct *
After this the clean option worked, and R was regenerated.
This was it for me:
In your AndroidManifest.xml file, make sure that you have the SDK installed for the version number in android:minSdkVersion="##".
You can install SDKs from the Android SDK Manager, found under Window -> Android SDK Manager in Eclipse / ADT.
For me it ended up being gen/com/(appname)/R.java missing.
Not in my recycle bin, not anywhere... just took a surprise vacation and never returned.
I had a backup copy in a different folder. Copied it back and all's good now
After everything running normally for a few weeks, we're suddenly getting the following message printed in Eclipse's Console every few seconds.
R.java was modified manually! Reverting to generated version!
The project still compiles and runs normally but seems to take a little longer than usual. Cleaning and rebuilding doesn't help the issue. The R file is getting generated correctly and no other errors are showing up throughout the project. The problem is present on both developers' machines.
Does anyone have any idea what's going on? Everything I could find deals with the R file not being generated. Thanks!
Well, that was an odd one. One of our developers accidentally checked in a version of the .project file that included a builder that was incompatible with the Android SDK. Even after finding that and removing the entry we still had to open the project's Properties > Builders and disable/reenable any of the builders in order for it to take effect. Restarting eclipse (or even my machine) wasn't enough.