// 检查是否已有读写麦克风的权限
bool status = await Permission.microphone.isGranted;
//判断如果还没拥有麦克风权限就申请获取权限
if (!status) {
return await Permission.microphone.request().isGranted;
}
if (status != PermissionStatus.granted) {
print('发生异常了。。。。');
}