I know setting up Android development environment is bit lengthy and annoying. You need to download Eclipse, Android Plugin, SDK etc separably and set it up on your machine.
Now once again, Google comes to rescue.
You can download Android SDK which includes following
- Eclipse + ADT plugin
- Android SDK Tools
- Android Platform-tools
- The latest Android platform
- The latest Android system image for the emulator
Thanks to Google for making it so simple which is gonna help the new developers.