Phone isn't recognized by ADB

this whole thing is a nightmare, at least in windows. I had my phone connected and everything was ok. I have a Samsung Galaxy, I've installed the USB driver and it was okay, I could run apps from eclipse directly on my phone. Now nothing is differentm but when I type adb devices it recognizes my phone but its offline. USB debug option is che开发者_StackOverflow中文版cked, and I have the right drivers installed. Any idea? thanks!

I ve seen multiple times this problem and there is no common answer. i'll make a list of solutions that I have seen across severals forums:

• Restart ADB server with the following commands: adb kill-server and then adb start-server

• Change the USB cable you are using: I've seen a lot of complaints about Samsung's USB cable.

• Change the USB socket you are using

• Try to reinstall the drivers (for instance, for Samsung devices, installing Kies; this solved the problem for me)

• Try to reboot your phone

• Unset the debug mode on the device and set it again

Adb seems to often cause troubles, not the best piece of software I've seen!

Make sure your phone's SD card isn't mounted as a drive on your Windows machine. Whenever that happens to me, I can't connect via adb.

Have you also tried to change the USB socket in which you plugged the USB cable?

Sometimes one thinks about unplugging/replugging, but not about changing the USB socket in which to plug the cable. All the more since it is correctly recognized by Windows.

I had the same symptoms (Windows recognizing my Samsung Galaxy, but not ADB), and changing the place where I plugged the USB cable did worked for me.

Have you tried restarting the adb server?

Run:

adb kill-server    
adb start-server    
adb devices