要在Acumatica中实现机会屏幕的推送通知，您可以使用以下代码示例：

1. 创建一个事件处理程序来处理机会屏幕的Save按钮点击事件，并在保存成功时发送推送通知：

public class OpportunityMaint_Extension : PXGraphExtension
{
    public delegate void PersistDelegate();
    [PXOverride]
    public void Persist(PersistDelegate baseMethod)
    {
        baseMethod();

        // 检查是否有新的机会被保存
        Opportunity currentOpportunity = Base.Opportunity.Current;
        if (currentOpportunity != null && Base.Opportunity.Cache.GetStatus(currentOpportunity) == PXEntryStatus.Inserted)
        {
            // 发送推送通知
            PX.Data.EP.Employee employee = PX.Data.EP.EmployeeMaint.GetCurrentEmployee(Base);
            PXNotification.PushNotification.Send(new PX.Data.EP.NotificationRecipient
            {
                Source = employee,
                SourceType = typeof(PX.Data.EP.Employee),
                Destination = PX.SM.NotificationDestination.AllUsers,
                Message = "New Opportunity Saved: " + currentOpportunity.OpportunityID
            });
        }
    }
}

2. 创建一个图形扩展类来注册事件处理程序：

public class OpportunityMaint_Extension : PXGraphExtension
{
    public delegate void PersistDelegate();
    [PXOverride]
    public void Persist(PersistDelegate baseMethod)
    {
        baseMethod();

        // 检查是否有新的机会被保存
        Opportunity currentOpportunity = Base.Opportunity.Current;
        if (currentOpportunity != null && Base.Opportunity.Cache.GetStatus(currentOpportunity) == PXEntryStatus.Inserted)
        {
            // 发送推送通知
            PX.Data.EP.Employee employee = PX.Data.EP.EmployeeMaint.GetCurrentEmployee(Base);
            PXNotification.PushNotification.Send(new PX.Data.EP.NotificationRecipient
            {
                Source = employee,
                SourceType = typeof(PX.Data.EP.Employee),
                Destination = PX.SM.NotificationDestination.AllUsers,
                Message = "New Opportunity Saved: " + currentOpportunity.OpportunityID
            });
        }
    }
}

确保在Acumatica中将此代码示例添加到适当的扩展类中，并在适当的时候注册事件处理程序。这将使您能够在保存机会时发送推送通知。