It is simple to have Android up and running on windows platform.
Steps are as follows.
1. Install Latest Java SDK from here .
2. Install Eclipse from here .
3. Download Android SDK from here . Unzip it in c:\android directory.
4. Start Eclipse and select ‘Help->Software Updates’
5. Select ‘Available Software’ Tab and click on ‘Add Site’. Enter “http://dl-ssl.google.com/android/eclipse/” in the Location text field.

6. Select ‘OK’ and then click on ‘install’.Once the tools are installed. Eclipse will ask for restart.Let it restart.
7. Once Eclipse has started select ‘Windows->Preferences’ and Click on android tab.
8. Select ‘c:\android’ or the location where you unzipped the Android SDK.
9. You are all set to develop for android.