清單中聲明的​​BroadcastReceiver未收到廣播

Question

我試圖註冊一個Wifi BroadcastReceiver，以便在更改時獲取wifi狀態。但到目前爲止，我沒有收到廣播的運氣。

<application 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" > 
    <receiver android:name=".WifiReceiver" > 
     <intent-filter> 
      <action android:name="android.net.wifi.WifiManager.WIFI_STATE_CHANGED_ACTION" /> 
      <action android:name="android.intent.action.PHONE_STATE" /> 
     </intent-filter> 
    </receiver> 

    //activity declaration here... 

</application> 

你們知道如何在清單中註冊BraodcastReceiver嗎？

我並不想註冊活動，因爲我想監控無線時候有我的應用程序是否運行，或者是wifi的狀態變化。

這是我的廣播接收器類：

public class WifiReceiver extends BroadcastReceiver { 
    private final String TAG = "WifiReceiver"; 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, WifiManager.WIFI_STATE_UNKNOWN); 
     String wifiStateText = "No State"; 

     switch (wifiState) { 
     case WifiManager.WIFI_STATE_DISABLING: 
      wifiStateText = "WIFI_STATE_DISABLING"; 
      break; 
     case WifiManager.WIFI_STATE_DISABLED: 
      wifiStateText = "WIFI_STATE_DISABLED"; 
      break; 
     case WifiManager.WIFI_STATE_ENABLING: 
      wifiStateText = "WIFI_STATE_ENABLING"; 
      break; 
     case WifiManager.WIFI_STATE_ENABLED: 
      wifiStateText = "WIFI_STATE_ENABLED"; 
      break; 
     case WifiManager.WIFI_STATE_UNKNOWN: 
      wifiStateText = "WIFI_STATE_UNKNOWN"; 
      break; 
     default: 
      break; 
     } 
     MyLog.d(TAG, "onReceive Broadcast > WiFiState: " + wifiStateText); 
     MyLog.d(TAG, "onReceive Broadcast > Time: " + new Date()); 
    } 
} 

我真的希望能得到一些幫助。提前致謝。

Answer 1

你的清單中接收機應該看起來像這樣

<receiver android:name=".WifiReceiver" > 
    <intent-filter> 
     <action android:name="android.net.wifi.WIFI_STATE_CHANGED" /> 
    </intent-filter> 
</receiver> 

也可能需要以下權限

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> 

Answer 2

僅僅因爲廣播是用標誌Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT發送的，這意味着你的應用程序必須在android啓動之前註冊這個接收器，它只能是系統服務。

Answer 3

我想你已經註冊的接收器就像這樣：

<receiver 
    android:name=".WiFiReciever"> 
    <intent-filter> 
     <action 
      android:name="class name with package" /> 
     <data 
      android:scheme="myscheme" /> 
    </intent-filter> 
</receiver> 

Answer 4

<receiver android:name=".WifiReceiver" > 
    <intent-filter android:priority="100" > 
      <action 
      android:name="android.net.wifi.WIFI_STATE_CHANGED" 
      android:enabled="true" /> 
    </intent-filter> 
</receiver> 

輸入t他高度重視，也使標誌爲真

Answer 5

爲我工作的最好的：

清單：

<receiver android:name="com.AEDesign.communication.WifiReceiver"> 
    <intent-filter android:priority="100"> 
     <action android:name="android.net.wifi.STATE_CHANGE" /> 
    </intent-filter> 
</receiver> 

WifiReceiver類：

public class WifiReceiver extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO); 
     if(info != null) { 
      if(info.isConnected()) { 
       //Do your work. 
       //To check the Network Name or other info: 
       WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE); 
       WifiInfo wifiInfo = wifiManager.getConnectionInfo(); 
       String ssid = wifiInfo.getSSID();  
      } 
     } 
    } 
} 

權限：

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> 
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> 

Answer 6

這是與互聯網連接

<action android:name="android.net.conn.CONNECTIVITY_CHANGE" /> 
<action android:name="android.net.wifi.WIFI_STATE_CHANGED" />     
<action android:name="android.net.wifi.STATE_CHANGE" />