Question

我正在编写一个家庭自动化程序。我有一个片段，当你与它交互时，它将切换远程设备。在收到设备的响应后，我更新片段中的图像视图以反映设备的状态（灯泡打开/灯泡关闭）。我也有一个小部件做同样的事情。

我正在使用AsyncTasks来处理远程调用。为了实现小部件和片段之间的一致性（例如，如果我使用小部件关闭灯光，片段中的图像也会更新）我正在拥有发送该切换请求寄存器本身的所有内容（在onUpdate中）小部件，以及片段的onCreateView）作为其他切换事件的监听器。我想这会让我有两个听众。片段和小部件。但是，在实践中，我看到了5个或6个小部件实例，我不知道为什么。这是我的听众代码。

public class LightToggleTask extends SparkAPITask {
private static String api_path = "toggle";
private static HashMap<OnTaskCompleted, Context> statusListeners = new HashMap<OnTaskCompleted, Context>();

public LightToggleTask(String deviceID,OnTaskCompleted listener, Context context) {
    super(deviceID, api_path, listener, context);
    statusListeners.put(listener, context);//adding listeners to the hashmap
}

public static void registerForToggleEvent(OnTaskCompleted listener, Context context){
    statusListeners.put(listener, context);
}

@Override
    public void onPostExecute(JSONArray jsonArray){
        Set entries = statusListeners.entrySet();
        Iterator i = entries.iterator();
        while(i.hasNext()){

            Map.Entry entry = (Map.Entry)i.next();
            Log.i(TAG, "onPostExecute() -> Notifying observer that task has completed: " + entry.toString());
            ((OnTaskCompleted)entry.getKey()).onTaskCompleted(jsonArray, (Context)entry.getValue());
        }
    }

我在日志中获得的内容是这样的：

11-05 10:37:51.470  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@4260a528=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.490  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@425de730=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.490  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@42623750=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.500  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@426cfa50=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.500  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@426305c8=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.500  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: com.example.hcp.home_control_prototype.WidgetProvider@42691b20=android.app.ReceiverRestrictedContext@426cfa68
11-05 10:37:51.500  25437-25437/com.example.hcp.home_control_prototype I/SparkAPITask﹕ onPostExecute() -> Notifying observer that task has completed: ToggleLightFragment{42640d38 #0 id=0x7f09005b}=null

我可能会做一些非常愚蠢的事情。我是Android开发的新手，我不确定我错过了什么。好像即使我只有一个小部件，当我将它注册为监听器时，它每次都返回一个不同的密钥？我有更好的方法来做这件事吗？

观察者模式中的小部件行为

0 个答案: