Android 监听WIFI

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log
61         // 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 }

转载自http://www.cnblogs.com/wanghafan/archive/2013/01/10/2855096.html]