installing eclipse plugin for android

Question

I'm installing Android Plugin in eclipse, I'm following:

developer.android.com/sdk/installing/installing-adt.html

I download the adt plugin and eclipse asked me to restart, I did it and when it started I got this mistake.

I click the Open Preferences, but I can't find nothing similar to adt in my windows computer. Where should it be this folder? what is usually the name?

Answer 1

Per the Setting Up an Existing IDE (of which the guide you are referencing is a part of):

You should have already downloaded the Android SDK Tools

Download the SDK Tools, then set up your Eclipse ADT Plugin, directing it to the directory you installed the SDK tools into.