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Error : Plug-in com.android.ide.eclipse.adt was unable to load class com.android.ide.eclipse.adt.ToolsLocator.

Error:
Plug-in com.android.ide.eclipse.adt was unable to load class com.android.ide.eclipse.adt.ToolsLocator. An error occurred while automatically activating bundle com.android.ide.eclipse.adt


Solution
  1. If you have not added ADT then do the Following steps.
    • Help -> Add New Software -> Add.
    • In Name option write ADT
    • And if you have installed ADT in your Computer then add its path in Location like
      • jar:file:/D:/ADT-16.0.1.zip!/
    • And then ADT will install.
    • And if there is a problem try to remove that adt and install again.
      • remove the ADT repo (Window->Preferences->Install/Updates->Available Software Sites)
      • add Indigo repo ("http://download.eclipse.org/releases/indigo")
      • run updates
      • add ADT repo again and install
  2. Restarting the application (Or) Restarting the computer.Some projects did not load.I think reinstalling ADT should do the trick.
  3. This problem is also caused by updating plugin. I have done this in the following way. Help > Install new software > click on link What is already installed you can see a list of installed software. You can choose and update any one as you want. If you click check for update it will update all the software that we installed it will take a lot of time. By this way you can update the one that you want. This can be done in a minute. it saves time.
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