Android(安卓)监听WIFI

[一篮饭特稀原创，转载请注明出自http://www.cnblogs.com/wanghafan/archive/2013/01/10/2855096.html]

1.注册一个广播接收器，监听网络状态

1     private void Start()2     {3         IntentFilter filter = new IntentFilter();4         filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);5         filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);6         filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);7         this.registerReceiver(myBroadcastReceiver, filter);8     }

2.取消注册广播器

1     private void Stop()2     {3         this.unregisterReceiver(myBroadcastReceiver);4     }

3.新建监听类NetworkConnectChangedReceiver继承BroadcastReceiver

 1 public class NetworkConnectChangedReceiver extends BroadcastReceiver 2 { 3     @Override 4     public void onReceive(Context context, Intent intent) 5     { 6         // 这个监听wifi的打开与关闭，与wifi的连接无关 7         if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) 8         { 9             int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);10             switch (wifiState)11             {12             case WifiManager.WIFI_STATE_ENABLED:13                 Log.e("APActivity", "WIFI_STATE_ENABLED");14                 break;15             case WifiManager.WIFI_STATE_ENABLING:16                 Log.e("APActivity", "WIFI_STATE_ENABLING");17                 break;18             case WifiManager.WIFI_STATE_DISABLED:19                 Log.e("APActivity", "WIFI_STATE_DISABLED");20                 break;21             case WifiManager.WIFI_STATE_DISABLING:22                 Log.e("APActivity", "WIFI_STATE_DISABLING");23                 break;24             }25         }26         // 这个监听wifi的连接状态即是否连上了一个有效无线路由，当上边广播的状态是WifiManager.WIFI_STATE_DISABLING，和WIFI_STATE_DISABLED的时候，根本不会接到这个广播。27         // 在上边广播接到广播是WifiManager.WIFI_STATE_ENABLED状态的同时也会接到这个广播，当然刚打开wifi肯定还没有连接到有效的无线28         if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction()))29         {30             Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);31             if (null != parcelableExtra)32             {33                 NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;34                 switch (networkInfo.getState())35                 {36                 case CONNECTED:37                     Log.e("APActivity", "CONNECTED");38                     break;39                 case CONNECTING:40                     Log.e("APActivity", "CONNECTING");41                     break;42                 case DISCONNECTED:43                     Log.e("APActivity", "DISCONNECTED");44                     break;45                 case DISCONNECTING:46                     Log.e("APActivity", "DISCONNECTING");47                     break;48                 case SUSPENDED:49                     Log.e("APActivity", "SUSPENDED");50                     break;51                 case UNKNOWN:52                     Log.e("APActivity", "UNKNOWN");53                     break;54                 default:55                     break;56                 }57             }58         }59         // 这个监听网络连接的设置，包括wifi和移动数据的打开和关闭。60         // 最好用的还是这个监听。wifi如果打开，关闭，以及连接上可用的连接都会接到监听。见log61         // 这个广播的最大弊端是比上边两个广播的反应要慢，如果只是要监听wifi，我觉得还是用上边两个配合比较合适62         if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction()))63         {64             NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);65             if (info != null)66             {67                 StringBuilder sb = new StringBuilder();68                 sb.append("info.getTypeName() : " + info.getTypeName() + "\n");69                 sb.append("getSubtypeName() : " + info.getSubtypeName() + "\n");70                 sb.append("getState() : " + info.getState() + "\n");71                 sb.append("getDetailedState() : " + info.getDetailedState().name() + "\n");72                 sb.append("getDetailedState() : " + info.getExtraInfo() + "\n");73                 sb.append("getType() : " + info.getType());74                 Log.e("APActivity", sb.toString());75             }76         }77     }78 }

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