Android 監聽WIFI

[一籃飯特稀原創，轉載請註明出自http://www.cnblogs.com/wanghafan/archive/2013/01/10/2855096.html]

1.註冊一個廣播接收器，監聽網路狀態

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.取消註冊廣播器

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

3.建立監聽類NetworkConnectChangedReceiver繼承BroadcastReceiver

 1 public class NetworkConnectChangedReceiver extends BroadcastReceiver 2 { 3     @Override 4     public void onReceive(Context context, Intent intent) 5     { 6         // 這個監聽wifi的開啟與關閉，與wifi的串連無關 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         // 這個監聽wifi的串連狀態即是否連上了一個有效無線路由，當上邊廣播的狀態是WifiManager.WIFI_STATE_DISABLING，和WIFI_STATE_DISABLED的時候，根本不會接到這個廣播。27         // 在上邊廣播接到廣播是WifiManager.WIFI_STATE_ENABLED狀態的同時也會接到這個廣播，當然剛開啟wifi肯定還沒有串連到有效無線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         // 這個監聽網路連接的設定，包括wifi和移動資料的開啟和關閉。60         // 最好用的還是這個監聽。wifi如果開啟，關閉，以及串連上可用的串連都會接到監聽。見log61         // 這個廣播的最大弊端是比上邊兩個廣播的反應要慢，如果只是要監聽wifi，我覺得還是用上邊兩個配合比較合適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 }