How to edit Google Android Code

I am 开发者_高级运维new to google android will anyone please tell me how to edit google android code to develop my own applications?

I would start with The Developer's Guide:

Welcome to the Android Dev Guide! The Dev Guide is a practical introduction to developing applications for Android. It explores the concepts behind Android, the framework for constructing an application, and the tools for developing, testing, and publishing software for the platform.

Use Android SDK

In Eclipse, with the Android SDK which is free at d.android.com

It depends on your preferred programming language: the main language for Android is Java, but it also supports scripting languages like Python and Lua. For Java, you can download the Android SDK, which should have all you need to get started. Also, check out http://developer.android.com/ for tutorials, help, docs, etc.