RemoteCallbackList 是 Android 中的一个类，用于管理跨进程的回调接口。它提供了一种安全和高效的方式来管理多个回调对象，并避免因为进程间通信 (IPC) 导致的内存泄漏问题。RemoteCallbackList 的主要作用是在客户端和服务端之间传递回调对象，所以一般传递对象代码：

val listenerMap = mutableMapOf<Class<*>, RemoteCallbackList<IInterface>>()
fun sendState(state: Int) {synchronized(lock){var remoteCallbackList = listenerMap.get(OnStateAidl::class.java)remoteCallbackList?.let {var num = remoteCallbackList.beginBroadcast();for (i in 0 until num) {var listener = remoteCallbackList.getBroadcastItem(i) as OnStateAidlif (listener!=null){listener.onState(state)}}remoteCallbackList.finishBroadcast();}}}

代码还挺多，如果存在多个回调方法代码量会非常大，下面将重复的逻辑提取为一个通用的函数，然后在需要调用不同回调函数的地方进行调用

fun sendData(listenerClass: Class<*>, callback: (Any) -> Unit) {synchronized(lock) {val remoteCallbackList = listenerMap.get(listenerClass)remoteCallbackList?.let {val num = remoteCallbackList.beginBroadcast()try {for (i in 0 until num) {val listener = remoteCallbackList.getBroadcastItem(i)listener?.let {callback.invoke(listener)}}} finally {remoteCallbackList.finishBroadcast()}}}}

重新修改传递数据代码：

fun sendState(state: Int) {sendData(OnStateAidl::class.java){listener->(listener as OnStateAidl).onState(data)}}