MotoDev Studio for Android is Motorola’s integrated development environment based on Eclipse which forms complete development package. One installer ensures an integrated development environment with Eclipse 3.5 and Android Development Tools (ADT) plus automatic download and configuration of the latest Android SDK.
If you already have Eclipse and you want to do develop Android apps, you can manually install ADT as described here.
Useful links:
MotoDev Studio
Eclipse
Installing the SDK