I got an error in Eclipse, ERROR: Unknown option '--no-crunch' in Eclipse. I cannot start the emulator. The reason is I updated ADT plug-in in Eclipse. But I have not update the SDK at the same time.The new ADT Plug-in used the new option in SDK.
The solution is simple, please click SDK Manager in Eclipse, it will update itself. Remember the option,"Help->Check for updates", won't update your SDK. It will only update the ADT plug-in.