'No debuggable processes in Logcat and debug window

I got so confused by android studio.it can't identify my device. like this enter image description here

the app is build in debug mode. enter image description here

besides, if I kill the adb server and restart the adb, it can identify the device and the process, the after a while, if I kill the app, and reopen it, the android studio cannot identify it again...

No other processes occupy adb process.I even reinstalled my Android Studio, but still not work.



Solution 1:[1]

I reinstall the platform-tools in android studio->sdk manager. And then the problem was solved.

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 Kirin_CN