你有没有勾选禁用启动动画"?

Do you have "Disable Boot Animation" checked?

另外，如果这不能解决问题，那么有帮助的一件事是，您在编写代码时实际上不必关闭模拟器屏幕.如果您在它已经打开时单击调试，您的 APK 将被上传到模拟器并立即启动.出于某种原因，我花了一段时间才弄清楚我不必手动关闭模拟器.

Also, if that doesn't fix it, one thing that helps is that you never actually have to close the emulator screen while you're coding. If you click debug when it's already open, your APK will get uploaded to the emulator and start pretty much immediately. For some reason it took me a while to figure out that I didn't have to manually close the emulator.