public class NetworkConnectChangedReceiver extends BroadcastReceiver{  

    @Override      public void onReceive(Context context, Intent intent) {      if (WifiManager.WIFI_STATE_CHANGED_ACTION.equals(intent.getAction())) { //这个监听wifi的打开与关闭，与wifi的连接无关  

            int wifiState = intent.getIntExtra(WifiManager.EXTRA_WIFI_STATE, 0);               LogTag.showTAG_e("WIFI状态", "wifiState"+wifiState);              switch (wifiState) {               case WifiManager.WIFI_STATE_DISABLED:                   break;               case WifiManager.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())) {              Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);                if (null != parcelableExtra) {                    NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;                    State state = networkInfo.getState();                  boolean isConnected = state==State.CONNECTED;//当然，这边可以更精确的确定状态  

                LogTag.showTAG_e(this.getClass().getSimpleName(), "isConnected"+isConnected);                  if(isConnected){                  }else{                                        }              }            }      //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())){          NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);          if (info != null) {              LogTag.showTAG_e("CONNECTIVITY_ACTION", "info.getTypeName()"+info.getTypeName());              LogTag.showTAG_e("CONNECTIVITY_ACTION", "getSubtypeName()"+info.getSubtypeName());              LogTag.showTAG_e("CONNECTIVITY_ACTION", "getState()"+info.getState());              LogTag.showTAG_e("CONNECTIVITY_ACTION",                                  "getDetailedState()"+info.getDetailedState().name());              LogTag.showTAG_e("CONNECTIVITY_ACTION", "getDetailedState()"+info.getExtraInfo());              LogTag.showTAG_e("CONNECTIVITY_ACTION", "getType()"+info.getType());          }       }  

if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) {

// 这个监听wifi的连接状态  

           Parcelable parcelableExtra = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);               if (null != parcelableExtra) {                   NetworkInfo networkInfo = (NetworkInfo) parcelableExtra;                   State state = networkInfo.getState();                 if(state==State.CONNECTED){                  showWifiCconnected(context);                 }                 /**else if(state==State.DISCONNECTED){ 

                showWifiDisconnected(context); 

               }*///昨天写的这个方法，在坐地铁的时候发现，如果地铁上有无效的wifi站点，手机会自动连接，但是连接失败后还是会接到广播，所以不能用了  

           }           }  if(ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())){ //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  

NetworkInfo info = intent.getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);  if (info != null) {      if(NetworkInfo.State.CONNECTED==info.getState()){          Intent pushIntent = new Intent();          pushIntent.setClass(context, NotificationService.class);      }else if(info.getType()==1){              if(NetworkInfo.State.DISCONNECTING==info.getState())                  showWifiDisconnected(context);          }      }   }         }