Whats the easiest tool to use to make android games

[pixelpower]

I have been developing for windows mobile games for a year and now because of windows phone7 Iam doing a radical switch. I plan on developing for android and want to know which tools are
1)easy to learn
2)is all on one no multiple - pieces to download
3)is effient
Thank you for your help.

[redd214]

heres a link that may help, its a bit old but seems to have a lot of content:
http://www.rbgrn.net/content/54-gett...me-development

i just googled "android game devlopment" and that was the first link that popped up.

good luck!