已移除的Location Change Listener仍持续广播事件问题求助

我实现了如下LocationListener接口：

class LocationListener(eventManager: RoadSnappedLocationProviderEventManager): RoadSnappedLocationProvider.LocationListener {
    var eventMananagerRef: RoadSnappedLocationProviderEventManager? = null
    init{
        eventMananagerRef = eventManager;
    }
    override fun onLocationChanged(p0: Location?) {
        Log.d("TZ", ("TZZZ  $p0.toString()"))
        val params: WritableMap = Arguments.createMap()
        params.putString("message", p0.toString())
        eventMananagerRef?.sendEvent(LOCATION_UPDATE_RECEIVED, params)
    }

    override fun onRawLocationUpdate(p0: Location?) {
        val params: WritableMap = Arguments.createMap()
        eventMananagerRef?.sendEvent(LOCATION_UPDATE_RECEIVED, params)
    }
}

并通过以下代码将其附加到NavigationApi.getRoadSnappedLocationProvider：

override fun onNavigatorReady(navigator: Navigator) {
                mNavigator = navigator
                locationListenerRef = LocationListener(eventManager)
                Log.d("TZ starting snapped ", locationListenerRef.toString())
                NavigationApi.getRoadSnappedLocationProvider(reactContext?.currentActivity?.application ?: Application()).addLocationListener(locationListenerRef)
            }

监听器正常触发位置变更事件，但调用移除方法后，事件处理器仍持续触发：

fun removeLocationListenerProvider(promise: Promise) {
        try {
            Log.d("TZ", ("REMOVING LOCATION LISTENER + ${locationListenerRef.toString()}"))
            NavigationApi.getRoadSnappedLocationProvider(reactContext?.currentActivity?.application ?: Application()).removeLocationListener(locationListenerRef)
            locationListenerRef = null
            Log.d("TZ", "REMOVED LOCATION LISTENER")
        } catch(e: Exception) {
            Log.d("TZ", e.toString())
        }
    }

• 复用同一个RoadSnappedLocationProvider实例
  核心问题是你每次调用NavigationApi.getRoadSnappedLocationProvider()都会获取新的实例，添加和移除监听器操作的不是同一个Provider对象，导致移除无效。解决方法是在初始化时保存Provider的引用，后续所有操作都复用该实例：

  // 类成员变量保存Provider实例
  private var locationProvider: RoadSnappedLocationProvider? = null
  
  override fun onNavigatorReady(navigator: Navigator) {
      mNavigator = navigator
      locationListenerRef = LocationListener(eventManager)
      // 初始化并保存Provider实例
      locationProvider = NavigationApi.getRoadSnappedLocationProvider(reactContext?.currentActivity?.application ?: Application())
      Log.d("TZ starting snapped ", locationListenerRef.toString())
      locationProvider?.addLocationListener(locationListenerRef)
  }
  
  fun removeLocationListenerProvider(promise: Promise) {
      try {
          Log.d("TZ", ("REMOVING LOCATION LISTENER + ${locationListenerRef.toString()}"))
          // 使用保存的Provider实例移除监听器
          locationProvider?.removeLocationListener(locationListenerRef)
          locationListenerRef = null
          locationProvider = null // 不再使用时可置空释放资源
          Log.d("TZ", "REMOVED LOCATION LISTENER")
          promise.resolve(null)
      } catch(e: Exception) {
          Log.d("TZ", e.toString())
          promise.reject("REMOVE_ERROR", e.message)
      }
  }
  

• 验证监听器的对象相等性
  确保LocationListener的equals()和hashCode()方法正确实现（如果自定义了这些方法），否则Provider可能无法识别要移除的是同一个监听器实例。你当前使用的是同一个监听器引用，这一点没问题，但如果后续有复用场景需要注意。

• 确保移除操作在主线程执行
  部分Android导航SDK要求回调相关操作在主线程执行，可将移除逻辑切换到主线程：

  fun removeLocationListenerProvider(promise: Promise) {
      reactContext?.currentActivity?.runOnUiThread {
          try {
              Log.d("TZ", ("REMOVING LOCATION LISTENER + ${locationListenerRef.toString()}"))
              locationProvider?.removeLocationListener(locationListenerRef)
              locationListenerRef = null
              locationProvider = null
              Log.d("TZ", "REMOVED LOCATION LISTENER")
              promise.resolve(null)
          } catch(e: Exception) {
              Log.d("TZ", e.toString())
              promise.reject("REMOVE_ERROR", e.message)
          }
      } ?: promise.reject("ACTIVITY_NULL", "Current activity reference is null")
  }
  

内容的提问来源于stack exchange，提问作者Tzvetlin Velev