no sdk platforms or apis on earlier android sdk
i downloaded the earlier version of android sdk and adt because i bought a book and this stupid book is using earlier version.

the latest version of sdk is now r20, but i downloaded r15 and ADT 15.0.1. and it doesn't show any of sdk platforms OR apis.

if i use the latest version, few things are changed and i can't follow this book.

i MUST use earlier ADT to understand this book. it really doesn't matter that if i use earlier sdk, but this stupid eclipse says that i should use lastest version of ADT.

anyone help me???????
no sdk platforms or apis on earlier android sdk
===

i downloaded the earlier version of android sdk and adt because i bought a book and this stupid book is using earlier version.

the latest version of sdk is now r20, but i downloaded r15 and ADT 15.0.1. and it doesn't show any of sdk platforms OR apis.

if i use the latest version, few things are changed and i can't follow this book.

i MUST use earlier ADT to understand this book. it really doesn't matter that if i use earlier sdk, but this stupid eclipse says that i should use lastest version of ADT.

anyone help me???????