Flutter问题：Waiting for another flutter command to release the startup lock

Problems importing the project runs outside Flutter

When the top of the open AndroidStudio simulator has been loading state, even if the simulator has been opened. 

Run flutter doctor Tips

Waiting for another flutter command to release the startup lock

Github about the investigation of the flutter issue to find a solution, as follows: 

1, open flutter installation directory / bin / Cache / 
2, delete the file lockfile 
3, restart AndroidStudio

If the above method does not take effect,

Try

1. Turn off AndroidStudio, close dart.exe process in Task Manager.

2, open flutter installation directory / bin / Cache / 
3, delete the file lockfile 

Reference: Flutter Issue