清单中声明的​​BroadcastReceiver未收到广播

Question

我试图注册一个Wifi BroadcastReceiver，以便在更改时获取wifi状态。但到目前为止，我没有收到广播的运气。

<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> 

你们知道如何在清单中注册BraodcastReceiver吗？

我并不想注册活动，因为我想监控无线时候有我的应用程序是否运行，或者是wifi的状态变化。

这是我的广播接收器类：

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帮助。提前致谢。

Answer 1

你的清单中接收机应该看起来像这样

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

也可能需要以下权限

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

Answer 2

仅仅因为广播是用标志Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT发送的，这意味着你的应用程序必须在android启动之前注册这个接收器，它只能是系统服务。

Answer 3

我想你已经注册的接收器就像这样：

<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> 

输入t他高度重视，也使标志为真

Answer 5

为我工作的最好的：

清单：

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

WifiReceiver类：

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();  
      } 
     } 
    } 
} 

权限：

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

Answer 6

这是与互联网连接

<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" />