[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 }