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I just followed the steps on http://developer.android.com/sdk/installing/installing-adt.html#Download to download and install the ADT plugin for Eclipse on my Mac. As soon as it finished downloading, I tried opening Eclipse to finish configuring the ADT. I, however, cannot open Eclipse anymore. All I get is the following error:

error message

How can I fix this error and get Eclipse to open again? What are the correct steps to successfully install the ADT plugin?

Tot Zam
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  • try this :http://osxdaily.com/2012/07/27/app-cant-be-opened-because-it-is-from-an-unidentified-developer/ – KOTIOS Apr 28 '15 at 04:50
  • @N5. Tried that already. Not the problem. Would get error message that from unidentified developer if that was the problem. It seems that the new Android ADT files somehow messed up the rest of my eclipse. – Tot Zam Apr 28 '15 at 04:56

2 Answers2

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I was able to get Eclipse to open again without a complete reinstallation, remove all the bad ADT files, and then successfully install the ADT plugin with the following steps:

(I don't know if this method is correct, but it worked)

Get Eclipse to open:

  1. Download a new copy of Eclipse into a different folder.
  2. From the new Eclipse folder, copy only the Eclipse.app file into the old Eclipse root directory.

I was then able to open Eclipse by clicking on the new Eclipse.app in my old Eclipse folder. All my old projects and preferences were still there.

Delete Bad ADT Files:

  1. In Eclipse Help > Installation Details > select all Android files and click uninstall
  2. In Eclipse Help > Eclipse Marketplace > search for adt > uninstall the Android Development Tools for Eclipse

Reinstall the ADT Plugin:

I then had problems reinstalling the ADT Plugin and was getting the following error message:

An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase...

Following the directions I found here, I deleted the artifacts.xml file in the Eclipse root directory. I then relaunched Eclipse and was able to install the ADT Plugin through Help > Eclipse Marketplace > search for ADT > click the install button on the ADT package > relaunch Eclipse.

Update Note:

As mentioned in the Android developer documentation, since June 2015, the Eclipse ADT plugin is no longer supported and it is recommended to switch to Android Studio.

Community
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Tot Zam
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Solution to this problem, is try restarting the system and reopen the eclipse, if it doesn't solve then next possible way is to re-download the ADT package once again.

Harsh Dattani
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