[vibrunazo]

Both you and the blog author are misunderstanding what targetting an API means. You can target 4.1 and still have your app run on 2.2 or lower. As others said, many of the new APIs have been backported to earlier versions. And targeting newer APIs have many additional benefits. As an Android Developer, you should always use the newest SDK and target the newest API. But still try to design for older versions.

Read: http://developer.android.com/guide/topics/manifest/uses-sdk-...