Need a detail info about how to learn and start developing Mobile Application

hey guys, till now i have developed web applicati开发者_高级运维ons but know i'm thinking to get hands on Mobile Application. So how to i start it n from where coz i have no idea about Android,iPhone,Symbian etc.. nor i dn't have a big Phone to know how applications runs on it.. mainly i want to focus on Android Applications, is there any simulator for Android Phones, i dn't even know how to use simulators..I just need a step-by-step tutorial for mobile app development n Android Application.

Go to http://developer.android.com . This is the official website for Android and it contains a detailed documentation regarding the procedure to download Android SDK...configuring and running programs in Eclipse. Apart from that you do have various other websites that offer you basic documentation.

https://stackoverflow.com/questions/3405695/importantuseful-websites-for-the-android-related-stuff