Running the emulator from eclipse

Configured eclipse and create the "Hello, Android" project. After that you need to note some important points

1. Make sure you ran it as an android application (Run As -> Android Application)
2. Check wheather java is installed before installing the eclipse software
3. If all is done correctly means, just close the eclipse and start it again, it will work.

If there is problem means comment the problem

Android Error: cannot execute binary file - on running SDK commands

While installing sdk for Mac OS X version of the SDK there is a chance for this error.
For that make sure that wheather the OS is x86

Command Prompt

poseidon:~ jj$ aapt 
-bash: /Users/check/android_sdk_m3-rc20a/tools/aapt: cannot 
execute binary file