Android adb “Unable to open sync connection!”

Question

I can run and debug my Android app on my phone just fine, most of the time. Then, seemingly randomly, when I try to run or debug my app from Eclipse, the Console in Eclipse

Answer 1

This error occurs when somehow the Android Debug Bridge , which is the tool to send data from our computer to the connected device, disconnects. As we know, there are some layers to get connected like the adb itself and of course, the last layer is the USB cable, so when you already tried to restart your adb script and seem not working, you just need to reconnect your cable.