Cannot run with sound null safety, because the following dependencies don‘t support.
解决办法:打开Android Studio,选择【main.dart】旁边的【Edit Configurations】-->【Add Additional Run args 】输入 --no-sound-null-safety
解决办法:打开Android Studio,选择【main.dart】旁边的【Edit Configurations】-->【Add Additional Run args 】输入 --no-sound-null-safety