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Conversion to Dalvik format failed with error 1 since facebook SDK

I'm getting really frustrated over this. Every imte i try to export my project I get the error: Conversion to Dalvik format failed with error 1
I tried a lot of things. I got the newest eclipse. Changed my proguard file.
This error only happened when I added the facebook 3.5.2 SDK to my project. We had in our library the same android-support-v4.jar. I deleted the one in my app and kept the one in the facebook SDK but I still het that error. Can anybody help me it's really frustrating ...
Thanks in advance..

We too faced this error and we found a smart solution for this,
Steps to resolve this error:
Uncheck the "Build Automatically" option in Project menu in eclipse.
Do project clean
And then, right click on the project name over
here you will find "Build Project" option
Click the "Build
Project" and now you can start export your project.
I hope it should work to you too.Please try and let me know...

For NewRelic users:
If you have integrated the newrelic jar in your app, this happens when the newrelic version is outOf date.
Solution:
Update the newrelic jar to the latest version. On eclipse, its just right click on the project and update newrelic. Or you can download the new version directly.
Thanks amalBit

I had the same error, and tried everything above but nothing helped me.
My projects are attached to GIT source control system, and I realized that there are some GIT related task while exporting to Andorid application. Then I commited all changes to the GIT repository and error dissapear.
So, if you are using GIT for source control and nothing above help you, try to commit all changes to the GIT repository (and eventually push to upstream) and try export again.

Java/Eclipse - No more R file ever

I'm on Eclipse for hours now and I didn't found a solution yet for my problem even after many searches on internet: I have no more R.java file on my projects.
On just created or on my old projects, i don't have R file anymore and I tried so many solutions (uninstall, re-install Eclipse, clean my project, check all my XMLs, fix problem with android tool and so on ...)
Please someone can tell me what to do in this case?

Hey If you just updated to ADT Rev 22 :
I had the problem too. There is a new component in the Tools folder called "Android SDK Build-tools" that needs to be installed.
Step 1
Open the Android SDK Manager
Step 2
Select the newly added Build Tools and install. (If problem stays then go to Project Properties => Java Build Path => Order and Export and check Android Private Libraries, then clean and build project.
It may be necessary to repeat the process, restart the SDK Manager after the update and make sure it looks like this (all tools installed):
More info:https://groups.google.com/forum/?fromgroups=#!topic/android-developers/rCaeT3qckoE%5B1-25-false%5D

Perhaps in Project Properties -> Java Build Path -> Libraries you don't have:
Android 4.2.2 (or other version)
Android Dependencies ?
If so, then right click project - > Android tools -> fix android properties
and see if this library showed up.

Thank you all for saving me! I've spent the whole afternoon on search this error.
Finally, my project works.
By the way, I also encountered one problem which i wanna share with you:
After upgrading, even if my project has not errors anymore. During runtime, it seems it couldn't find the classes from the jars placed in \libs.
Go into Project=>properties => Java build path= > Order and Export.
Please make sure all your jars are checked.

If this problem occurs suddenly in a well working project,
the first step is to find whether the problem occurs only in the current project or in all other projects.
if all other projects in the current workspace are working then 90% problem is with XML / mainfestfile/resourse file that you edited recently.
This error is not shown as red mark we have to find out what we have done recently in these files.

try this
sudo apt-get install lib32stdc++6 lib32z1 lib32z1-dev
it solved my problem

Close your eclipse and after refreshing system, try to open Eclipse again. I think you are using Emulator along with the eclipse. It may be because of the low Memory problem (RAM) of your system. I used to face the same problem when I use Emulator

whenever there is any mistakes in any of the xmls the R goes missing when a build or clean happens so check for any xml errors in your project unless you fix it you cant get back your R on clean or build. fix the xml files and perform a clean you will have the R generated. Also check in File->properties->Builders and see if everything is checked

I was using Eclipse Indigo and nothing I tried worked. I ended up downloading Juno SR2, reinstalling the ADT, and now everything works again.

Reinstall everything and it'll work.. i.e. go back to Google SDK or w.e. you're using and download it.
Update it to latest in SDK Manager.
Go into Eclipse-Project-Prefs-Java build path-order/export TICK EVERYTHING.

problem: No R file get generated.
guess: Try cleaning project if it is old one. Else create new project with no R get generated and with no compile errors but this: no project.apk
In this case you have to check your SDK for the built-tools. May not be installed after updating SDK.
Thus download them if not download here, then put them under directory: SDK/built-tools folder. Lastly, and most important, is to Run the SDK As Administrator. This guarantees refreshing SDK with all packages appearing in it.
Install the SDK-Built-Tools or any missing packages according to the above link and you're done.
hope this helps.

Try one thing, create a new Android Project and transfer all those files which are in the previous project. That worked for me.

In my case there is error due to "&" inside strings.xml file(but error not shown) for declaring string for a array type. Now the problem has been solved as I changed "&" to "and".
So, please make sure that you do not have such silly use of symbols, and clean the project.

I have had the same kind of problem, however Rechecking all XML files in the Resources folder was helpful in my case. I found syntax error in my XML files. Cleaning and building the project again can be helpful sometimes too.

I had the dreaded not more R.java.
Some of the things I've used in the past:
Clean / rebuild (the first thing we all try)
Restart eclipse (optionally reboot pc/mac)
Update both SDK/ADT eclipse plugin to latest version
Create new eclipse workspace and import project
Enable Verbose AAPT build output Eclipse menu>Preferences>Android>Build
Port project to Android Studio / Gradle (this helped my actually see the AAPT error i was getting Error Code:138)
Delete recent XML changes - Ultimately I found deleting recent menu.xml files I'd added and commenting out where they were referenced fixed the issue and I finally got R.java.

I got the error recently and had found no fault in any layout or value file. After a lot of tries I add another Activity and the R.java was build and the error disappeared. I don't know why this occur, but it takes me hours.

Update ADT from 21.0 to 21.1

i downloaded APIs 15,16 and 17. After the download is finished, I closed eclipse but when i open it again it gives me a message box saying I need to update my ADT from 21.0.0 into 21.1 or higher, (and my current project suddenly didnt work, and full of red lines). There is a "Check for Updates" button. But after clicking it, it says there was no update found. I asked Google and found out that there is already ADT 21.1 released. I am wondering if I should just download the latest ADT bundle, but also looking for a quicker solution. I said “quicker” because my internet connection is a bit slow. :( It will take me a whole day to finish the download. :( And also after i downloaded the API, my graphical layouts do not show any more. There is a message saying "Eclipse is loading the SDK. Home.xml will refresh automatically once the process is finished." I waited for eternity, but nothing shows up. Im pretty messed up here. My project does not work anymore, although it worked well before i downloaded the APIs. Can anyone help me?. Thanks.

Go to eclipse > help > Check for updates.
It should list the latest update of adt. If it doesn't work, try this :
go to eclipse > help > Install new software
Click on add
add this url : https://dl-ssl.google.com/android/eclipse/
It will list the updates available- which should ideally be adt 21.1.0 (latest)
install the latest adt and everything should be fine.

The same thing happened to me, here's what I did-
Apparently, the SDK updated to version 21.1, but ADT, still at 21.0. 21.1 is currently a preview release (so I'm not sure how we accidentally updated the sdk...), so you have to manually add the update source. There's a nice guide (http://tools.android.com/preview-channel), but here's what you need:
Start Eclipse, then select Help > Install New Software.
Click the "Add" button, in the top-right corner.
In the Add Repository dialog that appears, enter "ADT Previews" for the Name and the following URL for the Location:
https://dl-ssl.google.com/android/eclipse-preview/
Click OK.
If you have trouble acquiring the plugin, try using "http" in the Location URL, instead of "https" (https is preferred for security reasons).
In the Available Software dialog, select the checkbox next to Developer Tools and click Next.
This worked for me, although I would rather have just downgraded the sdk.
Hope I helped!

go to window -> SDK manager and then install Android SDK Tools to 21.1 and then check for updates again.
I used to get error " update cannot be installed " for that run eclipse in Admin permission.

same with your problem !!!
btw, Thanks for the info ! I tried it after read this and wohooow It worked ! thx
go to eclipse > help > Install new software
click on add
add this url : https://dl-ssl.google.com/android/eclipse/

Setting up Android Development Tools in Eclipse

If you download android SDK now, it comes with a custom eclipse with android fully installed on it, so way easier
Solved!, it was solved by downloading Eclipse Indigo, but as indicated online, they tell you to go to ‘File>New>Other…>Android>Android Project‘, but Android Project is not in the list?
So,
I recently wanted to start making a Java android app, and by going to developer.android.com, they told me, install Android SDK tools, so i did that, then in eclipse, i have to got to help, ad new software, and use this : Enter Android Development Tools in the Name field, and https://dl-ssl.google.com/android/eclipse/ in the Location field. , so i did that, and it keeps giving me this error :
(com.android.ide.eclipse.adt.feature.group 20.0.2.v201207191942-407447)
Missing requirement: Android Development Tools 20.0.2.v201207191942-407447 (com.android.ide.eclipse.adt.feature.group 20.0.2.v201207191942-407447) requires 'org.eclipse.core.runtime 3.6.0' but it could not be found
i looked it up on google, but couldnt find anything...
Does anyone now how to fix this?
Greets

I am using Eclipse Helios. Download Eclipse IDE for Java Developers from here & update it latest packages by goto to menu Help -> Check for new updates.
Download & install Android SDK.
To install ADT Plugin:
Start Eclipse, then select Help > Install New Software....
Click Add, in the top-right corner.
In the Add Repository dialog that appears, enter "ADT Plugin" for the Name and the following URL for the Location:
https://dl-ssl.google.com/android/eclipse/
Click OK
Note: If you have trouble acquiring the plugin, try using "http" in the Location URL, instead of "https" (https is preferred for security reasons).
In the Available Software dialog, select the checkbox next to Developer Tools and click Next.
In the next window, you'll see a list of the tools to be downloaded. Click Next.
Read and accept the license agreements, then click Finish.
Note: If you get a security warning saying that the authenticity or validity of the software can't be established, click OK.
When the installation completes, restart Eclipse.

Procedure to work with android in Eclipse juno is :
Step 1: Install jdk-7 version and then Install installer_r16-windows.exe
Step 2: now unzip the android-sdk and paste it into disk c android folder and replace all.
Step 3: now unzip the eclipse-juno.
Step 4: open eclipse ide and go to the help option and click on new software install option.
Step 5: click on archive and give the path to ur ADT-20.0.3 or any version and choose restart eclipse option.
Step 6: now two green button will be displayed on the left most upper side of eclipse.
Step 7: first click on small arrow type button and see all the packages are installed if not choose install package.
Step 8: now click on second big green button named AVD i.e android virtual device.
Step 9: click on new and configure ram and all u want in your AVD.
Step 10: your AVD is on screen now.

(Using the comments to provide an answer)
Try using the latest version of Eclipse (Juno), or at least Eclipse Indigo. The newer version of the Android Framework might have dependencies that the latest versions of Eclipse provide.
If this is incorrect / doesn't work, let us know so we can update the solution.

You didn't install ADT plugins yet or something goes wrong.
Download ADT-20 form HERE
In eclipse goto--> Help --> Install new Software --> Select ADT-20.zip
For step-by-step instruction HOW TO INSTALL ANDROID see this

As per your given error it is sure an version problem.. you might be trying to add ADT whose version is below ADT-20 and your ecllips is asking for ADT-20..so try to provide link which contains ADT version 20. If still problem exists go to : http://developer.android.com/sdk/installing/installing-adt.html there they have also given download for ADT-20.zip file download it and install it manually.

I had the same problem, I installed Eclipse Indigo and it worked perfect... because it's version 3.7.2 so it should be working fine with this.

Android Eclipse Classpath - want to add classpath container path but eclipse won't let me

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?