Question

我有一个Wifi课，有几个广播接收器，可以监听Wifi连接状态，Wifi Rssi等级的变化......

我希望能够将此数据传递给另一个“引擎”对象，并仍然保持数据动态变化。

我目前在“Engine”类中创建一个Wifi对象并运行其方法，然后在log cat中的Log语句中动态显示数据。

我的问题是尝试将动态更改的数据发送到Engine，当我尝试通过它获取数据时获取第一个值并将其保留在该值而不进行更新。

所以我想知道我的选择是怎么做的？

以下是我当前的代码设置，如果有任何帮助：

Wifi课程

public Wifi(Context context){

    mainWifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

}

public int getCurrentWifiState() {
    return currentWifiState;
}


public void setCurrentWifiState(int currentWifiState) {
    this.currentWifiState = currentWifiState;
}



public String getConnectedSSID() {
    return connectedSSID;
}


public void setConnectedSSID(String connectedSSID) {
    this.connectedSSID = connectedSSID;
}


public int getConnectedLevel() {
    return connectedLevel;
}


public void setConnectedLevel(int connectedLevel) {
    this.connectedLevel = connectedLevel;
}

//method to do a scan and receive info about all access points available
public List<ScanResult> scan(final Context context){

               receiverWifi = new WifiReceiver();
               mainWifi = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);

               context.registerReceiver(receiverWifi, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
               mainWifi.startScan();
               Log.d("WIFI DEBUG","\nStarting Scan...\n"); 
               wifiList = mainWifi.getScanResults();



    return wifiList; 
}

 class WifiReceiver extends BroadcastReceiver {
     public void onReceive(Context c, Intent intent) {
          sb = new StringBuilder();
          wifiList = mainWifi.getScanResults();
          ListIterator<ScanResult> results = wifiList.listIterator();

          while (results.hasNext()) {
              ScanResult info = results.next();
              String wifiInfo = "Name: " + info.SSID + "; capabilities = " + info.capabilities + "; sig str = " + info.level + "dBm";
              Log.v("WiFi", wifiInfo);
              Log.d("Signal Level", "Signal Level : " + mainWifi.calculateSignalLevel(info.level, 5));

          }

     }

 }

 //method to listen for changes in the level of the wifi connection
 public void initializeWiFiListener(Context context){
        Log.d("WIFI", "executing initializeWiFiListener");

        String connectivity_context = Context.WIFI_SERVICE;
        final WifiManager wifi = (WifiManager)context.getSystemService(connectivity_context);

        if(!wifi.isWifiEnabled()){
                if(wifi.getWifiState() != WifiManager.WIFI_STATE_ENABLING){
                        //wifi.setWifiEnabled(true);
                }
        }
        rssiListener = new BroadcastReceiver(){

                @Override
                public void onReceive(Context context, Intent intent) {
                        String action = intent.getAction();

                        if(WifiManager.RSSI_CHANGED_ACTION.equals(action)){
                            WifiInfo data = mainWifi.getConnectionInfo();
                            Log.d("WIFI", "RSSI has changed");
                            if(mainWifi.getConnectionInfo()!=null){
                            setConnectedSSID(data.getSSID());
                            setConnectedLevel(data.getRssi());
                            Log.d("WIFI", "new RSSI = " + data.getSSID()+ " " + data.getRssi() + "dBm");
                            }
                        }      
                }
        };
        //leak here - need to de reg receiver
        context.registerReceiver(rssiListener, new IntentFilter(WifiManager.RSSI_CHANGED_ACTION));
}

 //method to listen for changes in the connection to a wifi access point
 public void changeWiFiListener(Context context){
        Log.d("WIFI", "executing initializeWiFiListener");

        String connectivity_context = Context.WIFI_SERVICE;
        final WifiManager wifi = (WifiManager)context.getSystemService(connectivity_context);

        if(!wifi.isWifiEnabled()){
                if(wifi.getWifiState() != WifiManager.WIFI_STATE_ENABLING){
                        //wifi.setWifiEnabled(true);
                }
        }
        wifiChangeListener = new BroadcastReceiver(){

                @Override
                public void onReceive(Context context, Intent intent) {
                        String action = intent.getAction();

                        if(WifiManager.WIFI_STATE_CHANGED_ACTION.equals(action)){

                            Log.d("WIFI", "WIFI has changed");
                            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, -1);
                            Log.d("WIFI", "WIFI State = " + wifiState);
                            setCurrentWifiState(wifiState);

                        }  
                }
        };
        //Leak here - not unregistering receiver
        context.registerReceiver(wifiChangeListener, new IntentFilter(WifiManager.WIFI_STATE_CHANGED_ACTION));
}

public WifiReceiver getReceiverWifi() {
    return receiverWifi;
}

public void setReceiverWifi(WifiReceiver receiverWifi) {
    this.receiverWifi = receiverWifi;

我的引擎代码：

公共引擎（Context aContext）{

    context = aContext;

    cm = new CallManager(aContext);

    wifiManager = new Wifi(context);
    wifiManager.initializeWiFiListener(context);
    wifiManager.changeWiFiListener(context);    

    clc = new CallLogController();
}

public void controlCalls(){

    int currentWifiState = wifiManager.getCurrentWifiState();
    cm.monitorOutgoingCalls(context, currentWifiState, clc);

}


public void unRegAllRecievers(){

    wifiManager.unregRegisters(context);
    cm.unRegReciever(context);

}

public void doWifiScan(){


    scanTask = new TimerTask() {
        public void run() {
                handler.post(new Runnable() {
                        public void run() {
                            wifiManager.scan(context); 
                            Log.d("TIMER", "Timer set off");
                        }
               });
        }};


    t.schedule(scanTask, 300, 30000); 

}

public void stopScan(){ 

        scanTask.cancel();
        t.cancel();
        //boolean tf = scanTask.cancel();
        //Log.d("TIMER", "Timer True or False? : " + tf);

}

}

所以我只是想知道什么是最好的解决方案，以确保来自Wifi类的数据在接收到来自广播接收器的变化时在引擎中不断更新？

提前致谢

Answer 1

取决于你的班级，应该通知最新状态的班级。如果它是一个不是在Activity中创建并且是静态的（单音或基于应用程序）的类，那么你应该让Reciver更新单音类。

如果它是基于活动的，你需要坚持广播，一旦收到广播，就删除粘性广播。

Android - 将更改数据从BroadcastReceiver传递到另一个对象？

1 个答案: