Android 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 }
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