Android SDK in Windows (Eclipse platform)
Installation Guideline http://developer.android.com/training/basics/firstapp/index.html
Platform: Windows 7 with Java SE Development Kit
Download the Android SDK. http://dl.google.com/android/installer_r20.0.3-windows.exe (You may note down the path of installation)
Download Eclipse Classics http://www.eclipse.org/downloads/ and decompress the zip files.
Install the ADT plugin for Eclipse http://developer.android.com/sdk/installing/installing-adt.html
Start eclipse by Double click the eclipse.exe in the folder. (No installation is needed, suggested to add a shortcut in desktop for your convenience).
Select HELP - Install New software.
Click ADD.
Enter 'ADT plugin' and the URL https://dl-ssl.google.com/android/eclipse/ , click OK
Select the development tools and click NEXT and follow the instructions.
Restart eclipse.
Download the latest SDK tools and platforms using the SDK Manager.
In eclipse, Select Windows - Android SDK Manager
Select suitable items and update.
If eclipse can not found the path of your android SDK, You can select "Windws - Preferences", then select Android and type the path noted down in step (1).