[Android] Android(安卓)监听WIFI

1.注册一个广播接收器，监听网络状态

privatevoidStart(){IntentFilterfilter=newIntentFilter();filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);filter.addAction(WifiManager.WIFI_STATE_CHANGED_ACTION);filter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION);this.registerReceiver(myBroadcastReceiver,filter);}

2.取消注册广播器

privatevoidStop(){this.unregisterReceiver(myBroadcastReceiver);}

3.新建监听类NetworkConnectChangedReceiver继承BroadcastReceiver

publicclassNetworkConnectChangedReceiverextendsBroadcastReceiver{@OverridepublicvoidonReceive(Contextcontext,Intentintent){//这个监听wifi的打开与关闭，与wifi的连接无关if(WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())){intwifiState=intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE,0);switch(wifiState){caseWifiManager.WIFI_STATE_ENABLED:Log.e("APActivity","WIFI_STATE_ENABLED");break;caseWifiManager.WIFI_STATE_ENABLING:Log.e("APActivity","WIFI_STATE_ENABLING");break;caseWifiManager.WIFI_STATE_DISABLED:Log.e("APActivity","WIFI_STATE_DISABLED");break;caseWifiManager.WIFI_STATE_DISABLING:Log.e("APActivity","WIFI_STATE_DISABLING");break;}}//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。//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if(WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())){ParcelableparcelableExtra=intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);if(null!=parcelableExtra){NetworkInfonetworkInfo=(NetworkInfo)parcelableExtra;switch(networkInfo.getState()){caseCONNECTED:Log.e("APActivity","CONNECTED");break;caseCONNECTING:Log.e("APActivity","CONNECTING");break;caseDISCONNECTED:Log.e("APActivity","DISCONNECTED");break;caseDISCONNECTING:Log.e("APActivity","DISCONNECTING");break;caseSUSPENDED:Log.e("APActivity","SUSPENDED");break;caseUNKNOWN:Log.e("APActivity","UNKNOWN");break;default:break;}}}//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。//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//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if(ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())){NetworkInfoinfo=intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);if(info!=null){StringBuildersb=newStringBuilder();sb.append("info.getTypeName():"+info.getTypeName()+"\n");sb.append("getSubtypeName():"+info.getSubtypeName()+"\n");sb.append("getState():"+info.getState()+"\n");sb.append("getDetailedState():"+info.getDetailedState().name()+"\n");sb.append("getDetailedState():"+info.getExtraInfo()+"\n");sb.append("getType():"+info.getType());Log.e("APActivity",sb.toString());}}}}

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