Android 监听wifi, 3g的开、关

private BroadcastReceiver mConnReceiver = new BroadcastReceiver() {          @Override          public void onReceive(Context context, Intent intent) {                boolean isWifiConnected = false;              boolean isMobileConnected = false;                ConnectivityManager connMgr = (ConnectivityManager)                       context.getSystemService(Context.CONNECTIVITY_SERVICE);                NetworkInfo networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);                if(networkInfo != null)              isWifiConnected = networkInfo.isConnected();                networkInfo = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);                if(networkInfo != null)              isMobileConnected = networkInfo.isConnected();                      Log.d("network status", "wifi == " + isWifiConnected + " and mobile == " + isMobileConnected);            }      };

registerReceiver(mConnReceiver,              new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION));

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

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