设备（1）

app/src/main/java/com/example/defenseapplication/utils/DeviceIdEvent.kt

@@ -0,0 +1,30 @@
+package com.example.defenseapplication.utils
+
+object DeviceIdEvent {
+    private val listeners = mutableListOf<DeviceIdListener>()
+    private var currentDeviceId: String? = null
+
+    interface DeviceIdListener {
+        fun onDeviceIdChanged(deviceId: String)
+    }
+
+    fun addListener(listener: DeviceIdListener) {
+        if (!listeners.contains(listener)) {
+            listeners.add(listener)
+            currentDeviceId?.let { listener.onDeviceIdChanged(it) }
+        }
+    }
+
+    fun removeListener(listener: DeviceIdListener) {
+        listeners.remove(listener)
+    }
+
+    fun setDeviceId(deviceId: String) {
+        currentDeviceId = deviceId
+        listeners.forEach { it.onDeviceIdChanged(deviceId) }
+    }
+
+    fun getDeviceId(): String? {
+        return currentDeviceId
+    }
+}