White screen processing method of fulter startup page

because Android The performance of mobile phones is different , The reason why some mobile phones are turned on is that the white screen is displayed for a long time . Here are the solutions ：

There are two steps ：

1. Put the custom picture in flutter\android\app\src\main\res Below drawable perhaps mipmap Under the folder , Where exactly , According to one's own preference .

notes ： Which folder to use when putting pictures , It is necessary to put pictures under all folders corresponding to this folder

2. And then in flutter\android\app\src\main\res\drawable Find below launch_background.xml , Note that there are two .

Take these two xml Replace the picture inside , That's it .