'Unable to connect to ADB server

Previously I was able to connect Android Studio to Samsung Galaxy S4 and muz uPAD tablet. But then I encountered ADB problem. it says ADB is not responding.

Now I cannot connect Android Studio to my tablet or phone..

I tried re-installing Android Studio and tablet driver all over again. But still no connection to any of my devices.

What is the problem here ?



Solution 1:[1]

If you are working on windows then you can manually connect to adb.

  1. Kill the adb process from windows task manager.

  2. Go to C:\Users\%USERNAME%\AppData\Local\Android\sdk\platform-tools\adb.exe.

Double click on adb.exe. I think that might help you.

Solution 2:[2]

This could be some configuration problem with you android studio try to delete your .android file in your users folder and restart android studio(proceed with caution).first try with android emulator, make sure to keep your android sdk up to date. give some to android studio in first initialization.

Solution 3:[3]

It seems This was not Android Studio problem. I had installed PC to Android file transfer software called Moborobo in my PC and this software prevented Android Studio from connecting to my tablet when I ran Android Studio. When I uninstalled this, Android Studio connected to tablet without any problem. But it was really hard and had to do lot of trials to find out what was the problem.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 nirvana-msu
Solution 2 MaxExplode
Solution 3 sujan_014