First you need to set up Google Android SDK. While creating Android Virtual Device (AVD) you can specify the storage size in SD Card settings. You can specify any size upto 128 GB. Its really helpful if you want to install .apk applications on Emulator.
Your decision to start development on a new platform depends on how easy it is to write a “Hello World”. This tutorial helps you set up the development environment and write “Hello World” in few easy steps. This tutorial assumes that you are already familiar with eclipse and its installation.