我不知道您是否已经找到解决方案.但是我认为您可以尝试为需要通知的特征定义客户端配置特征描述符.

I don't know if you have already found a solution for this. But I think you could try by defining the Client Configuration Characteristic Descriptor for the characteristic you need the notifications for.

可以按照这篇文章中的说明进行操作. 在Android中实现BLE通知的任何方法-L预览

This can be done as shown in this post. Any way to implement BLE notifications in Android-L preview