Android Studio cannot find an Android emulator while running the program

When the Android studio finishes writing the code to run a look at the effect, it will find that when the emulator Selection window is opened, the emulator option is completely missing, but this time the emulator is clearly open, even if restarting the emulator is useless. And this happens occasionally, which means that the simulator can be found in most cases. Such as:

In fact, there are two solutions to this situation, the first is to restart your compiler , yes, because the process is occupied so you can not find the emulator you have opened, but you do not have the solution, just restart Android studio, restart the simulator is useless, Therefore, the compiler must be restarted. This method works but is somewhat complex. So let's talk about the second way.

　　The second approach is to find the ADB management option, close the occupied process, or open the ADB.

Here's how: click the Tools option at the top, find the ADB management options, click the Enable ADB intergration option to toggle the status, and run again to find the emulator options. such as:

　　

Android Studio cannot find an Android emulator while running the program