Issue when re-adding menu items (reloading UI)

[amannepid]

Bug Report

I am getting below error when running the app in Actual Ford Card Head Unit with Sync3.

E/SdlProxy: 4.9.1: Result: INVALID_ID Info: null
 I/SdlProxy: 4.9.1: Finished sending main menu commands. Sending sub menu commands.
 I/SdlProxy: 4.9.1: RpcConverter Attempting to create com.smartdevicelink.proxy.rpc.AddCommandResponse
 E/SdlProxy: 4.9.1: Failed to send sub menu commands: null
 E/SdlProxy: 4.9.1: Error Sending Current Menu
 E/SdlProxy: 4.9.1: Failure handling protocol message: java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object[] java.util.Collection.toArray()' on a null object reference
    java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.Object[] java.util.Collection.toArray()' on a null object reference
        at java.util.ArrayList.<init>(ArrayList.java:191)
        at com.smartdevicelink.managers.screen.menu.BaseMenuManager.setMenuCells(BaseMenuManager.java:177)
        at com.smartdevicelink.managers.screen.menu.MenuManager.setMenuCells(MenuManager.java:45)
        at com.smartdevicelink.managers.screen.menu.BaseMenuManager$8$1.onComplete(BaseMenuManager.java:953)
        at com.smartdevicelink.managers.screen.menu.BaseMenuManager$10.onError(BaseMenuManager.java:1054)
        at com.smartdevicelink.proxy.SdlProxyBase$92.onError(SdlProxyBase.java:4362)
        at com.smartdevicelink.proxy.SdlProxyBase.onRPCResponseReceived(SdlProxyBase.java:2230)
        at com.smartdevicelink.proxy.SdlProxyBase.handleRPCMessage(SdlProxyBase.java:2819)
        at com.smartdevicelink.proxy.SdlProxyBase.dispatchIncomingMessage(SdlProxyBase.java:1919)
        at com.smartdevicelink.proxy.SdlProxyBase.access$2700(SdlProxyBase.java:163)
        at com.smartdevicelink.proxy.SdlProxyBase$3.dispatch(SdlProxyBase.java:950)
        at com.smartdevicelink.proxy.SdlProxyBase$3.dispatch(SdlProxyBase.java:947)
        at com.smartdevicelink.Dispatcher.ProxyMessageDispatcher.handleMessages(ProxyMessageDispatcher.java:74)
        at com.smartdevicelink.Dispatcher.ProxyMessageDispatcher.access$000(ProxyMessageDispatcher.java:38)
        at com.smartdevicelink.Dispatcher.ProxyMessageDispatcher$1.run(ProxyMessageDispatcher.java:52)
        at java.lang.Thread.run(Thread.java:764)

The code that I use to reload UI is :

private fun clearUI() {
        sdlManager?.screenManager?.apply {
            softButtonObjects = arrayListOf()
            menu = arrayListOf()
        }
        createUI()
    }
private fun createUI(){
  sdlManager?.screenManager.menu = menuCellList
  sdlManager?.screenManager?.softButtonObjects = mainButtonList
}

OS & Version Information

• Android Version: Samsung S9, Android
• SDL Android Version: 4.9.1
• Testing Against: Ford Car with Sync