I am having trouble getting the Android Development Tools to install. I overcame one error involving the GEF. I now have a new error.
Missing requirement: Android Development Tools 0.9.6.v201002051504-24846 (com.android.ide.eclipse.adt.feature.group 0.9.6.v201002051504-24846) requires 'org.eclipse.wst.xml.ui 0.0.0' but it could not be found
I am running Kubuntu 9.10 and Eclipse 3.5. I have managed to get the Android DDMS to install. But I keep running into blocks with the Development Tools. I have the Android SDK installed.
What do I need to do in order get the missing component?
Ran into the same problem, and after a bit of searching, I found this:
http://code.google.com/eclipse/docs/faq.html#wstinstallerror
It looks like fedora ships with the official eclipse repository disabled by default. (was true for me on fedora 12 64bit) You need to go to Help->Install New Software, click on the "Available Software Sites" link, find the official repository in the list, and enable it.
I never use Eclipse classic as ADt requires wst..install eclipse j2ee or modeling to fix missing components
I ran into this when I did not precisely follow the order of the installation instructions. Delete your eclipse install and reinstall, run update until it doesn't find anything new, then install the android plugin checking the box that says to search all sites for required packages. It should clean it right up. You'll still need to do all the configuration in the developer.android.com instructions for installation.
Had the same issue.
I had to add the plugin for (in my case) galilio, by adding
http://download.eclipse.org/releases/galileo in the install new software tab,
then selected each of the WST packages (the xml one alone didnt resolve it).
They were listed twice (same version, different checksums), so I choose the first of each.
HTH,
Stuart
I was having this trouble for a couple weeks then i noticed my Anti-Virus icon (AVG) kept popping up beside my clock when i normally have it hidden.
I disabled my anti-virus and the web link scanner and tried again.
Worked fine.
Hope it helps.
Related
I have installed adt version 22.6.1 already 2 days ago. It was working fine. Suddenly, When I open eclipse today, it keeps showing me following error:
This Android SDK requires Android Developer Toolkit version 22.6.1 or above. Current version is 22.2.1.v201309180102-833290. Please update ADT to the latest version.
Here is screenshot of my eclipse's Android SDK Manager :
I tried with following steps to resolve my issue as discussed in this Link
Help | Install new software
Select the ADT update site (there are two, one with http:// and one with https://. If one doesn't work, try the other.
Select the developer tools section and press next.
You should see a dialog that says This software is already installed, an update will be performed instead. Clicking OK will lead to 22.6.1 being installed.
But unfortunately it didn't work for me.
Here is a screenshot I am attaching which shows the error I am getting while updating the tools.
How can I get rid of it?
I have solved this issue yesterday.
Follow the steps :
Help -> Install New Software -> Add -> (Give any name suppose NewUpdate) -> add this url : https://dl-ssl.google.com/eclipse/plugin/4.2 -> OK
Now it will list the available updates, which should ideally be adt 20.x.x
Select the list items Let it be installed. Eclipse will restart and Its done.
I hope this will helpful for you :)
Yet, if someone is facing this issue, Then follow steps below:
download new stand alone SDK from android's developer site
Close eclipse if it is opened and copy new downloaded sdk in the same location where your already existing old sdk is. Must replace conflict files and keep rest.
No need to delete old sdk. Copying as in step 2 will update your Android Developer Toolkit version to 22.6.1 or above which is required and will keep already downloaded APIs.
Now start your eclipse, and the error will be gone forever. :)
if someone will have trouble doing so, leave me a comment, will try to guide.
I managed to resolve it by doing the following:
Downloaded latest ADT (Win x64)
Deleted my old ADT install (It got bugged when I simply tried to overwrite the existing files) - see this google issue
Copied the zip file to C:\ (since it was complaining about too long filenames while unpacking)
Unpacked to my ADT install folder.
Ran updates and SDK manager updates.
Now it's working, but I lost my pretty Eclipse theme. Oh, and the target adt is not being resolved, a problem for another topic.
Just delete the existing ADT and install new version of ADT.generally this problems occurs
when you update SDK using below link.
https://dl-ssl.google.com/android/eclipse/
The ADT Bundle on developer.android.com seems to me as out of date.
I fixed the same problem by downloading eclipse (Java EE was my choice, but you can choose your flavor) and Installing the Eclipse Plugin
this steps solve my problem:
go to Help -> Install New Software.
in the bottom box, click What is already installed? text.
then you will see Eclipse Installation Details box, please Uninstall all conflicts software, in my case I uninstall the following software:
Android DDMS
Android Development Tools
Android Hierarchy Viewer
Android Native Development
Android Traceview
Tracer for OpenGL ES
when uninstall complete, please restart your Eclipse.
after your Eclipse open, please follow again these steps:
go to Help -> Install New Software.
in Work with box, select or add {ADT Plugin - https://dl-ssl.google.com/android/eclipse}.
then check all available software.
click Next > to install newest software.
I hope this helps you :)
I use OSX and facing the problem for 2 days.
I solved the problem by following the steps below:
-Download ADT Bundle from https://developer.android.com/sdk/index.html
-Help -> Install New Software
-Write https://dl-ssl.google.com/android/eclipse/ then install Developer tools
-Restart eclipse and raised the error below:
Android SDK content Loader has encountered a problem.parseSdkContent failed
java.lang.NullPointeException
-Delete .android folder under user profile. Restart eclipse
No errors and 22.6.1 is installed.
For those who tried everything but didn't get any positive result. I did the following and it worked:
Uninstall the ADT by helping from following link:
Uninstalling Android ADT
Now you can follow the install new software to add ADT to your eclipse. This way you won't get any conflict since you uninstalled old version.
I currently have Eclipse and ADT installed in the same directory as
F:\eclipse
\eclipse\
\sdk\
I downloaded and installed the latest ADT to
C:\Users\Rick\AppData\Local\Android\android-sdk
I then copied the contents of the C:\Users\Rick\AppData\Local\Android\android-sdk into the F:\eclipse\sdk\ folder, and let it merge all folders and overwrite everything.
Now I have 22.6.1 and I don't have to re-download all the platform stuff again.
Today me and one of my friends faced the same problem, so I have tried many things like restarting eclipse, checking updates, etc. but none was working for me.
Then I found a solution from Here and it's working as a charm for me and also for my friend.
Follow the steps here:
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.
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.
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.
The "Install new Software" under help in Eclipse will NOT work because it conflicts with ver#22.
I just downloaded the new Eclipse bundle from:
Get the Android SDK - google site, extracted it in a new folder ant it is done.
It is working smoothly, no problems.
Few tips to save you time:
Backup your workspace (just in case) - personally didn't use this back.
Once you open the new eclipse.exe it will ask you to select a workspace - just brows to your ols workspace and it will import all your projects (no problems).
In order to save time of download and install of the SDK again, I Cut & Paste the OLD SDK library from the previous bundle directory to the new one (Close your new Eclipse first).
When you re-open Eclipse, you may receive an error message saying that Eclipse can't find the SDK directory. It will ask you to open "Preferences". Once open, browse to the new SDK directory (the one that you just copied). Doing this will save you hours of re-installing all the SDK updates that you did on the previous Eclipse.
Have fun, it is really not a big deal.
This problem sounds similar to a few others, except in my case the OK button is not grey-ed out. But for those who would rather not click the links...
Trying to create or edit an AVD from within Eclipse, after entering my settings, the "OK" button seems to be "clickable", but when I click it absolutely nothing happens.
I've made sure I have the appropriate system images installed, and that the target platform matches the API being used. Clearly a CPU has been chosen, skin set, etc... all the things that would make the OK button greyed out, which it's not.
I can create/edit AVDs if I run the AVD manager from outside eclipse, so this isn't the end of the world, but I feel there's a solution to this particular problem and I want to help solve it.
I've tried running eclipse as an administrator (that's what stopped the AVD manager from crashing outside of eclipse). I've tried just waiting around, or clicking multiple times. Looking at the Task Manager, no new processes begin when I click OK, nor does eclipse's CPU or RAM usage increase at all. The "Edit Android Virtual Device" window doesn't even go away.
Any clues?
(Running Indigo with the ADT plugin, btw, not the bundled version, which failed to work in a different way. Java 1.6.0 45. Windows 8, unfortunately. Plenty of RAM etc)
THIS IS A POSSIBLE WORKAROUND FOR BUGS IN ADT 22.6.0 ONLY, THESE BUGS SUBSEQUENTLY FIXED IN FOLLOWING BUILDS
Download and install new ADT v22.6.1 from here (zip) or use SDK manager to update
Seems like some bug from Google side, this problem found after "ADT 22.6" update. Widely reported on "Android Open Source Project - Issue Tracker" and nobody properly answered it yet.
However I was partially successful to create an AVD by opening "AVD manager.exe" from "Android SDK" for creating new AVD try to open directly AVD Manager.exe in SDK folder.
May be we have to wait for any conformation from Android community
Worked for me, sort of.. .
(Windows 8.1 Pro 64 Bit, Java JDK 1.7 Update 25, Eclipse Standard Kepler Service Release 1, Android Development Toolkit 22.6.0.v201403010043-1049357)
Update 1
Further research revealed that launching AVD Manager from SDK Manager (Tools --> Manage AVDs...) also works without any problems.
Update 2
More bad news is AVD creation not working from command line tool too.
Update 3
Assuming some parameter passed during launching AVD manager from Eclipse causes these problems
Update 4
Updated Java to JDK 1.7 Update 51 and Eclipse Standard SDK to Kepler Service Release 2 their latest and no resolution to the problems. Also tested under Debian and same results obtained.
Update 5
At https://code.google.com/p/android/issues/detail?id=66661 android project members conforms the problems and promises to fix by upcoming versions of ADT (22.6.1 - 22.6.3). At the mean time I would suggest to roll-back ADT to a lower version version 22.3.0
To uninstall current ADT go to
Help --> About Eclipse --> Installation Details --> Android Development Tools --> Uninstall
I may suggest uninstalling whole packages from Android (DDMS, Hierarchy Viewer, NDT, Traceview, OpenGL ES..etc..) to avoid any possible compatibility issues and install a fresh new ADT from above link through archive installation method.
Hope this will solve this problem temporarily. And wait for new release of ADT here.
Update 6
New ADT, version 22.6.1 is out now which will solve these problems
To elaborate on the statement "I can create/edit AVDs if I run the AVD manager from outside eclipse" in the OP:
Run the following on the command line
<android-sdk-location>/tools/android avd (on Linux in this case)
This launches the same AVD window you see when you click the AVD Manager icon in the eclipse toolbar. But this instance of the AVD manager does not have the bug, and you can create and run emulators as you did before the bug was introduced.
1 minute solution
I used a quick workaround where I cloned a device that already existed. The Clone button worked and I was able to successfully edit the clone.
Steps:
Select a Device by Google
Click the "Clone..." button
A window will pop up, click "Clone device"
Select the newly cloned Device, it should say "... by User"
Click the "Edit" button on the side
There you have it, you now have your own custom virtual device
Update and Solution: AsYashwanth Krishnan said, The bug in question is now fixed in later versions. I tried ADT 222.6.1 and ADT 22.6.2 , and they did not suffer from the bug of not not being able to create or edit Android Virtual Devices. The direct solution is to update you ADT to latest version, The workaround written below is left only for historical purposes.
Historical Workaround As #Yashwanth Krishnan said, this is a bug in ADT plugin 22.6; so best workaround is to rollback. for those asking how to rollback, here is a step-by-step guide:
First: Uninstall ADT plugin and all related plugins for android:
help->about
Installation details
Select android plugins and press uninstall button
Restart
Second: Download ADT 22.3.0 Archive from https://dl.google.com/android/ADT-22.3.0.zip
and install it
add repository from archive on local disk
Select android plugins
INFO:
I WAS able to create an AVD successfully after clicking OK several times and modifying some of my settings as a test.
I tried yashwanth krishnan solution and tried to open the AVD Manageer.exe directly without success. The manager will not open directly for me on Windows 8 x64. It tries to open, then shuts down immediately...
I met this issue too . The issue occurs in the latest version 22.6 which was released in March . Meanwhile I did the testing in 22.3 , the issue was not found .
So that I suggest that rollback the ADT to 22.3 and wait the new fix for 22.6
I banged my head on this for several hours until I found out that the default location was C:\username path\SDKs or something, where Android was installed on my system to D:\sdks\android_sdk_windows. So, changing the Eclipse Android directory to D:\sdks\android_sdk_windows fixed it.
I also heard that it may help things if you install the Android SDK to a path without spaces.
Hope this helps someone keep some hair.
Today I ran into the same problem after installing Maven. I messed around with different Path settings to get it to work and I ran into issues. I was also trying to install the google server for GCM. Somewhere in what I was doing I corrupted the Android Virtual Device Manager. I searched S.O. for an answer, then I decided to follow the first rule of TechSupport. I reinstalled the tool kit!
I went into the SDK manager and I uninstalled the tools (by clicking the Tool checkbox). It took several minutes to delete them all. Then I reinstalled the Tools which took about ten minutes. I rebooted Eclipse and the AVD and worked just like it did yesterday!
This time it only took a total of twenty minutes to fix.
Per the release notes, this problem has been resolved in revision 22.6.1, which is now available for download.
Updated your Android SDK Tools to 22.6.1 in Eclipse by selecting Window > Android SDK Manager and follow the prompts to install the update.
After that update finishes, select Help > Check for Updates and follow the prompts to update the appropriate Eclipse components.
After completing these updates, I tested the AVD functionality and it appears to be working properly.
i just copied the avds from a different system as descriped here:
Android - How to copy the emulator to a friend for testing
I faced the similar issue. I am using 23.0.2 version of android SDK.
"OK" button was disabled, but then I went to the path where android SDK was installed. In my case:
C:\Program Files\Android\android-sdk\
and executed AVD-Manager.exe by right clicking and selecting Run as an Administrator, and it worked like a charm.
Sometimes the AVD cannot be created because of this following error while starting:
x86 emulation currently requires hardware acceleration!
I was also facing this same issue. If u are facing the same, then it can be resolved by opening SDK Manager -> Under Extra -> Installed "Intel x86 Emulator Accelerator (HAXM Installer). Then when creating the AVD, select the proper CPU. This should work. :-)
For those posting that we need to set the sdcard size: I tried that and many other settings, and none of that helps. I get the NoClassDefFound Exception mentioned by mogilka, in the Error view. No configuration settings are going to fix that. It seems a bad update was pushed
Give some value for your sd card. May be something like 100 or 200
Today I installed API8 from the SDK manager, previously I only had been working with API14. After the SDK manager was done, and upon restarting ADT I got this error:
This android SDK requires Android Developer Toolkit version 21.1.0
and above. Current version is 21.0.1.2012-12-6-2-58.
So I click to find updates but I get "no updates found".
I did the following:
Used the SDK manager to re-install android SDK tools (rev 21.1).
Used the SDK manager to re-install API8 and API14.
Still no go :(
I had the same issue. Please try the following in eclipse
Help --> Install new software
Then choose "Android Developer Tools Update Site - http://dl-ssl.google.com/android/eclipse/" from the drop down list and update the ADT
IF THIS THROWS ERROR Like this
No repository found containing: osgi.bundle,com.android.ide.eclipse.adt,21.1.0.v201302060044-569685
Modify http: to https:
Sample : https://dl-ssl.google.com/android/eclipse/
And then update ADT. This method worked for me.
You get that issue when your eclipse ADT plugin version doesn't match your SDK tools version.
Have you tried updating the ADT plugin in eclipse?
Help -> Install New Software and then using the ADT update site should work.
If you get a No Respository Found error using this site, you should use the HTTPS version instead.
If you're still having trouble getting it to install, you can download the zip standalone and manually install it. You can find the latest zip and installation instructions at the ADT troubleshooting page.
If problem in "http".
1) Help --> "Install new software" --> "Available Software Sites"
2) Click on "Android Developer Tools Update Site"
3) Click "Edit"
4) Mofify "http" to "https"
5) Click "Ok" --> "Ok"
6) Try update again.
I tried all methods mentioned here, but still without success.
What finally helped was the tip from No repository found error in Installing ADT in eclipse Indigo:
Uncheck “Contact all update sites during install to find required software”
you Should Update your ADT to Latest Version by below way.
Eclipse--> Go to Help--> Install New Software --> Add--> Inside Add Repository
Write Name="ADT"(as you want) and
Location="https://dl-ssl.google.com/android/eclipse/" --> after
loading some times you will get Developer Tools & NDK Plugins-->
checked both if you want to install Use NDK as future Use or checked
only developer Tool--> click Next--> Finish.
After this you can Update your SDK to latest Version.
Hope it will Help.
Got this one too, going from ADT 22.3 to 23.
Not sure what's keeping Eclipse from finding the updates (maybe some IDs changed or something), but the solution is to install the ADT plugins over the existing ones using Help -> Install New Software, just select the same site, no need to correct the URL from https to http or vice versa. The wizard will tell you there are a bunch of conflicts that'll result in removing the old versions of the plugins -- that's ok, go for it.
UPD Seemingly, (as at least one person downvoted the answer), installing new version over old one forcefully doesn't work for everyone. Here's the related bug where it's said that the old installation of Exclipse/ADT is hopelessly unupdatable and one should just download the new bundle to resolve this.
PS Anyway, you should be using Android Studio by now. Compared to Eclipse, it's a memory hog and has a very different feel to it and different hotkeys, but (as much as I hate to say it having been a snuggled up Eclipse user for a long time) it's way better, at least for Android development.
Same issue here, but luckily it is resolved now. The help->install new software and the android tool manager didn't help.
I re-downloaded the ADT bundle and simply copied over the failing installation, it works now.
I had the very same problem last weekend. Go to Help->Install new Software. Here use Android Developer Tools Update Site url - http://dl-ssl.google.com/android/eclipse/, two options should appear and I can't remember which one to choose ;) (It should be the one with DEV)
I don't think it is necessary but before I removed and downloaded the whole Eclipse with ADT. But it should not be necessary.
I'm developing for Android with Eclipse, and all was working well until yesterday. I used Ninite to update all my stuff, including JREs and everything (pro tip: do not do that), and it restarted my computer without asking in the middle of editing my workspace.
This caused all kinds of filthy problems, but now it all works, except for Android. I've updated Android SDK and the eclipse ADT, then when I try to tell Eclipse the SDK location, it gives this error:
This Android SDK requires Android Developer Toolkit version 14.0.0 or
above. Current version is 12.0.0.v201106281929-138431. Please update
ADT to the latest version.
Now, this is an outright lie. My ADT is version 14.0.something. I've tried Help>Check for updates, it says there are no updates. I've tried Help>Install new software...>Available Software Sites and removing the ADT repo, then reinstalling ADT, and it says it failed because I already have version 14.0.whatever.
How do I convince eclipse that my ADT is up to date??
I found the answer to the problem. (I'm using Helios, but it should work anyway)
Goto folder /Program Files(x86)/Eclipse/Plugins/ and make sure previous older versions of com.android.ide.eclipse.adt.package_##... are deleted (sometimes update fails to delete because of UAC). Keep the current desired version and complete the following.
Run Eclipse as administrator or disable UAC temporarily. (windows 7)
Go to Help → Install New Software.
On Work with: type https://dl-ssl.google.com/android/eclipse/ and press ENTER.
Wait for Eclipse to fetch the repository. An item named Developer tools will appear in the list.
Mark it for install, press Next and follow the steps to install the ADT tools.
When finished, it will ask to restart Eclipse. Make sure you do this.
When Eclipse restarts, all your Android SDK packages should show up again.
Dont forget to resume UAC if you need it.
An option is to manually download the ADT plugin (ADT archive) required. The page is, http://developer.android.com/sdk/eclipse-adt.html. The page reveals ADT 18 is available at http://dl.google.com/android/ADT-18.0.0.zip. The link is closer to the bottom page. I needed 17 although 18 was the latest, so I modified the download URL, changing 18 to 17.
Select Help → Install New Software → Add → Choose Archive and select the location of the downloaded ADT archieve file, Choose OK.
Select the components required and proceed as required. You may get a message that the software is already installed, proceed with the installation.
Hope this helps.
I had the same problem. My ADT in the eclipse was 8.x version. But my app required version 12 or more. So, I decided to upgrade both the Android SDK and ADT to the latest (at this time latest ADT is 17). I was able to upgrade the SDK but not the ADT. It always complained I got the versions already but I only had 8.x. The new SDK that I just upgraded would function only with ADT 14 and above. So, I had successfully broken my android development!!
The reason why I wasn't able to upgrade my ADT to the latest was because I was using Eclipse 3.5. The newer ADT versions require 3.6 or above. This small but key bit of information was really at the bottom of the error generated by Eclipse which required scrolling down (since only the top few lines of error were displayed). You typically wouldn't scroll down since these top few lines were followed by whitespace lines :). I did not scroll and I guess I wasted about a day trying to rectify this problem. But eventually I saw those 2 up/down arrows at the right of the dialog box and I scrolled down. There it clearly mentioned ADT 17 requires Eclipse runtime 3.6 and over.
So my solution was to find a suitable ADT that would work with Eclipse 3.5. Yes, tomorrow when I am in the mood, I shall upgrade to Eclipse 3.6 or 3.7 and the boat load of plugins I have :)
I've just upgraded my Android SDK version, and had exactly the same issue.
The 'Check For updates' Eclipse command failed because, for some reasons, Android Traceview failed to update.
My solution was to :
* Open Eclipse → Help → About Eclipse .
* Click Installation Details.
* Here select all the android related lines, and update them one by one, restarting eclipse each time.
And finally it worked ( even with Helios ) !
Best option is go to open eclipse ID
Then go to Help → About Eclipse >>
u will find the Installation Details button click on that
And now u can see the all anriod extension installed.
Select all or select one by one and just click the update button.
you will get the latest version from the net.
Hope these will help you all.
In Eclipse:
Help → Check for Updates.
Your ADT and SDK is not up-to-date yet and Eclipse is complaining about the right stuff...
Open Android SDK Manager from toolbar and update your SDK from there. It doesn't help if you are checking Eclipse updates. Because through Eclipse you cannot check SDK updates for Android.
Button looks like this :
I'm hearing a common issue is that newer Android ADK versions require newer eclipse versions. Colleagues who hit this say they installed Indigo in place of older Helios versions and were able to resolve the issue this way. I have not yet done the same myself.
To anyone else with this problem, my solution was just to delete the Eclipse folder, and download a new copy from scratch. I had to then re-download all plugins including adt, which worked this time round.
I'm using Windows 7 and installed the 64 bit version of Eclipse 3.5.2. I then installed the Android ADT plugin, but when I try to configure it in the Windows > Preferences dialog, the Android Plugin doesn't show up in the left pane. Instead I see DDMS. This prevents me from specifying the location of the Android SDK (unless there is another way) to give me the appropriate templates and such.
Someone posted a fix to this that includes setting the permissions of Eclipse, but that didn't work for me. I tried installing the Android Plugin from both online installation (thru the URL install) and the offline Archive method.
If you're running Windows Vista or 7, make sure you right-click Eclipse and RUN AS ADMINISTRATOR. I literally spent six hours figuring this out, and this was what fixed it.
Dear people from the future:
I had roughly the same problem in linux, except that i didn't see anything at all but vanilla eclipse after installing. by combining both previous answers i got it to work:
start eclipse with sudo eclipse -clean, install the plugins and restart eclipse. the plugins showed up including the welcome screen that's supposed to be there.
after that it should work when running as regular user as well.
works for both the android sdk and the gwt sdk. (and probably other eclipse plugins)
Remove the plugin, then restart as follows:
eclipse -clean
Now try reinstalling the ADT from the online installation
For users having similar problem and not luck with other solutions:
I have windows XP but had same problem. I realized that I had JDK5/bin folder in my PATH environment variable (though my JDK_HOME was pointing to JDK6), as soon as I modified the PATH to replace bin of JDK5 with JDK6, the Android buttons on eclipse (after restart with -clean) along with Android option in Preferences & New Project showed up. (Weird eh!)
Also, consider to install the bundle android installation having eclipse with pre-configured Android SDK if a new eclipse installation doesn't matter to you
http://developer.android.com/sdk/installing/bundle.html
The above answers do not confront the heart of the problem. There is a feature in Windows 7 that prevents downloaded files from direct access of local files. All of the state is perfectly maintained in the Eclipse workspace instance. The problem is easily resolved by doing the following:
Find the "Eclipse" executable
Right-click on it.
Click "Properties".
Select the "General" tab.
Look for -> Security: "This file came from another computer and might be blocked..."
Click Unblock.
This is a much better solution than uninstalling and reinstalling the ADT or Eclipse which can be a pain.