Develop Reference

Error Exporting Vuforia Unity Project into Eclipse

I'm using the Unity's Vuforia Extension, and created a AR scene. But while exporting to Android, a pop up came and SDK outdated, but my SDK is the latest.
I clicked continue and imported the project into Eclipse.
But while trying to run the project, it doesn't launch saying the projects have errors.
I tried cleaning and running again, it shows me this in the Console tab:
[2015-02-14 10:06:34 - QCARPlayerNativeActivity] Dx
trouble writing output: already prepared
[2015-02-14 10:06:34 - Dex Loader] Unable to execute dex: Multiple dex files define Lcom/qualcomm/QCARUnityPlayer/BuildConfig;
[2015-02-14 10:06:34 - QCARPlayerNativeActivity] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/qualcomm/QCARUnityPlayer/BuildConfig;
Any ideas anyone?

In the export window, I didn't click select the scene before clicking export.
Problem solved.

Error while running project from eclipse

I have downloaded cocos2d x v3.3 beta and created a project in windows using this command
cocos.py new Tutorialv3cocos -p com.ghostdreamstudo.learning -l cpp -d D:\Development\Learning
Then i have imported project to eclipse and tried to run but eclipse gives me following error
[2014-10-03 18:40:39 - Dex Loader] Unable to execute dex: Multiple dex files define Lorg/cocos2dx/lib/Cocos2dxAccelerometer;
[2014-10-03 18:40:39 - Tutorialv3cocos] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lorg/cocos2dx/lib/Cocos2dxAccelerometer;
Does anyone face the same problem or know how to solve this issue??

I had this problem before and was guided to remove Android dependencies from Java Build Path and it worked every time start up eclipse and do the removing for that session. As VPatidar mentioned, new Cocos2dx has some duplicate class org/cocos2dx/lib/Cocos2dxAccelerometer in two places. Remove one then that error disappears.
For any one still has this error, do one of these:
Remove libcocos2dx sources folder in Java Build Path > Source tab
or
Remove android.library.reference.1=../cocos2d/cocos/platform/android/java from project.properties file
I chose second.

Project File Import

I recently bought a new MacBook Pro and imported a couple of project files from the old laptop. Today I attempted to run an app on my device, but the project would not show in the run configurations window.I imported the file again, and got the project to show, but now I get the following error when trying to run on my device:
[2014-01-06 21:04:04 - Dex Loader] Unable to execute dex: Multiple dex files define Landroid/support/v4/app/Watson$OnCreateOptionsMenuListener;
[2014-01-06 21:04:04 - Verbatim] Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Landroid/support/v4/app/Watson$OnCreateOptionsMenuListener;
I believe I made a mistake in the way I transferred files over from the old laptop, as well as how I imported the project into the ADT. I have no clue what the above error means and have no idea how to begin fixing it. Perhaps someone can enlighten me. Thanks!

Seems like you have multiple versions of the same projects. Dex files are what really runs Android (converted from Java, thankfully done automatically)
Try deleting all of the same projects in the adt (make sure to back that one project up just in case). Try going to the workspace folder and make sure to have only one version of it, then import it. Hope it helps

Android: Dex conversion failed while importing

I got an error while i import an android project from one workspace location to another in eclipse.
I'm using Google_admob in my project to display ads..I does't have any errors and it works well in my old workspace.
Eclipse Version : Indigo Service Release 2
Android-Project Version : Android 4.0.3
Error states :
[2012-12-03 12:02:27 - Dex Loader] Unable to execute dex: Multiple dex files define Lcom/google/ads/Ad;
Conversion to Dalvik format failed: Unable to execute dex: Multiple dex files define Lcom/google/ads/Ad;

i found my problem.
I actually import my lib jar file in libs_folder and also in project_libraries(External Jar)..So 2 times dex file has created in bin/dexedLibs/ ..Now i deleted one jar file from one location ..
now its working
Thanks for your support geeks..

My problem was resolved after cleaning up some directories and files left over from the previous versions of the tools. ADT Rev 14 changes where binaries are stored. I deleted the entire bin directory, restarted Eclipse and cleaned the build and forced a rebuild. That seemed to do the trick initially but the problem came back after the next run.
I finally discovered that my bin directory was included in the project build path. I excluded bin from the build path and repeated the steps above. This resolved my problem.

Getting errors in Android Project in eclipse even if there is no error in source code or xml

Suddenly this time when I created a new project is showing me error. When we create a new project in eclipse its a Hello World Project which is set up. But that is also showing error, I checked my source code that was perfect. and xml is also perfect. I can't make out where is the actual error.
I tried Clean up my project but that too dint worked. I event tried Build Automatically but that also dint worked.
I even checked my sdk path, then Right click on Project-> Properties-> Java Build Path to check whether src file is listed as a Source folder.
Following error was shown in console.
[2012-09-22 17:41:03 - Dex Loader] Unable to execute dex: wrapper was not properly loaded first
[2012-09-22 17:41:03 - HelloHi] Conversion to Dalvik format failed: Unable to execute dex: wrapper was not properly loaded first
Any help is appreciated.

Just restart the eclipse and run the project. The error arises while installing a new target version. After completion of the installation it will get fix automatically.