Eclipse android emulator freezes
Better option is to use bluestacks android emulator. In my opinion, it is much faster than Google Android emulator.
Here are steps for setup:
1 - Install bluestacks emulator
2 - Open cmd
3 - Type command: set path="Android SDK\config\platform-tools"
(you need to enter the full path where is your adb.exe located
4 - adb connect 127.0.0.1
Now you should be able to run apps directly to BlueStack emulator from your IDE.
what I have found that helps me when a device goes offline is to go into the Window--->Show View --->Devices (you may have to click "Other" and select it there and then select "reset adb"
Sometimes the device goes "offline" for an unexplained (not explained to me anyway!) reason
You may just want to create another emulator with the same specs. Did you try that?
P.S. you may have to restart it again to have it listed in your Devices window