How can i make a music app?

I'm thinking about making an android music player app similar to power amp here's the link (https://market.android.com/details?id=com.maxmpz.audioplayer%26amp;feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5tYXhtcHouYXVkaW9wbGF5ZXIiXQ..) I know i have to pay 25 dollars to publish it on the android market and i'm going to make the app free i just want to know what kind of programs/software do i have to download/buy to be able to create the app ?..... Right now im using Eclipse/Android SDK/AVD|||try this link


http://www.wired.com/underwire/2011/06/s鈥?/a>


and also


http://createdigitalmusic.com/2011/01/mu鈥?/a>


thank you