虚拟机报错：
AVD Pixel_2_API_R is already running. If that is not the case, delete the files at D:\sdk.android\avd/Pixel_2_API_R.avd/.lock and try again. 国庆过了三天百无聊赖，今天上午起来发现虚拟机启动不了，根据自己母胎英语发现需要删除D:\sdk.android\avd/Pixel_2_API_R.avd/.lock下的.lock文件夹！以此记录，国庆快乐！
