I\'ve already installed the SDK and now I need the Eclipse plugin. However, it won\'t work. It gets to about 25-29% and hangs for a few minutes, then fails and I get this er
Download the ADT Plugin zip file
ADT Plugin Zip File
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.
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I meet this problem too. What I have done was downloaded the offline package, here: http://developer.android.com/sdk/eclipse-adt.html#troubleshooting . Hope I helped :)
I've solved this applying the fix that frogman suggests here: https://stackoverflow.com/a/10103295/106342
I reproduce it here:
Uncheck “Contact all update sites during install to find required software”
The checkbox mentioned there is in the dialog that shows up when you hit "Install new software".
I was having a similar problem. Tried the answer above, and still getting this:
An error occurred while installing the items session context was:(profile=SDKProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.Install, operand=null --> [R]com.android.ide.eclipse.adt 20.0.3.v201208082019-427395, action=). Failed to prepare partial IU: [R]com.android.ide.eclipse.adt 20.0.3.v201208082019-427395.
I'm running Win 7 Premium on a Dell Laptop 64bit