我解决了这个问题-就我而言，我在Mac上的活动监视器"中发现了几个 adb 进程，并杀死了所有进程，直到保持了 1 adb 的过程，它有所帮助.

I resolved this problem - in my case I found in Activity Monitor on my Mac several processes of adb and kill force all processes until stayed 1 adb processe and it helped.

编辑:尝试使用终端命令:

EDIT: try in terminal comands :

adb kill server
adb start server

这有助于重启您的adb，我必须一直在Android Studio =(

It help to restart your adb, I have to do it all the time on Android Studio =(

EDIT-2 :也是一种神奇的解决方法:

EDIT-2: also magic way to fix:

adb install -r -t apk_debug.apk

然后从android studio中"运行应用"

And then just "Run app" from android studio