I have been developing in Android for approximately two months now. Yesterday, my eclipse starting giving me the error:
The connection to adb is down, and a severe error has occured.
You must restart adb and Eclipse.
Please ensure that adb is correctly located at 'C:\android-sdks\platform-tools\adb.exe' and can be executed.
So I followed the steps for restarting adb located here.
Eclipse now gives me:
Android Launch!
adb is running normally.
My phones, however, are not being detected. I have a Galaxy S2 running Android 2.3.4 stock, and a S2 rooted running 4.0.3. Neither are being detected. On my home pc, both work fine in eclipse.
I have tried restarting my laptop, and even tried killing adb and eclipse and retrying the steps above. But it still won’t detect my phones. My emulators are working fine. It is worth noting that the severe error has occurred seems to come back when I restart my laptop.
Install the Device driver provided by samsung in your laptop.
You can install Samsung kies it also installs the device driver