Android - could not install *smartsocket* listener

If you have the situation where this keeps happening and killing and restarting still doesn't work it may be a problem with your adb installation. I had to reinstall adb to resolve this problem:

1. Reboot to ensure no instances of adb is running
2. Launch SDK Manager in Android Studio: Tools->Android->SDK Manager
3. Select the SDK Tools tab
4. Deselect Android SDK Platform-Tools item
5. Hit Apply
6. Check the on screen logs to make sure the un-installation succeeded and that the SDK/platform-tools folder is empty.

This should completely remove adb from your SDK.

1. Now re-select the Android SDK Platform-Tools item
2. Hit apply
3. Check the on screen logs that installation was successful.

I suspect in my case an update of the platform tools had failed perhaps because it failed to kill a running adb.exe and only a partial update was applied resulting in an unstable adb installation.

I fixed it by adding the ADB to path:

sudo ln -s ~/Android/Sdk/platform-tools/adb /bin/adb

And then killing the ADB server adb kill-server and starting the server again adb start-server.

Observation: I tried to kill java, tried to find the port where it was running using HTOP and Kill, aside from restarting everything but it was a pain in the ass

I solved this for myself by simply closing the shell I'd been running adb commands in and starting a new one, inspired by Vinayak Mestri's answer.

Open command prompt and enter following command

netstat -ano | findstr :5037

This will show procees id

TCP 127.0.0.1:5037 0.0.0.0:0 LISTENING 832

832 is procees id

Now run command

tasklist | findstr processID (e.g tasklist | findstr 832)

It will show process name like bash.exe

just go to task manager and end the task bash.exe and use following command to start adb

adb start-server

voillllaaaaaaa........