Systemservice Study Notes: connectivitymanager

Connectivitymanager function: monitors the network connection status

Use the context. getsystemservice (context. connectivity_service); method to obtain,

Permission required: Android. Permission. access_network_state

Common Methods:

1. getallnetworkinfo () // obtain all network connection information

2. getactivenetworkinfo () // get the information of the network that is being connected.

3. getnetworkinfo (INT networktype) // obtain the information of the specified network connection type

Networktype: connectivitymanage. type_wifi; connectivitymanage. type_mobile

Getallnetworkinfo () instance:

public static boolean isNetworkAvailable(Activity mActivity){Context context = mActivity.getApplicationContext();ConnectivityManager connectivity = (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);if(connectivity == null){return false;}else {NetworkInfo[] info = connectivity.getAllNetworkInfo();if(info != null ){for(int i=0; i<info.length; i++){if(info[i].getState() == NetworkInfo.State.CONNECTED){return true;}}}}return false;}

Getactivenetworkinfo () instance:

Public static Boolean isnetworkavailable (activity mactivity) {context = mactivity. getapplicationcontext (); connectivitymanager connectivity = (connectivitymanager) context. getsystemservice (context. connectivity_service); networkinfo = connectivity. getactivenetworkinfo (); // obtain whether the current network connection is available // determine the network type networkinfo. getType () = connectivitymanager. type_mobile if (networkinfo. isavailable () return true; else return false;

Getnetworkinfo (INT networktype) instance:

public static boolean isNetworkAvailable(Activity mActivity){Context context = mActivity.getApplicationContext();  ConnectivityManager connectivity = (ConnectivityManager)context.getSystemService(  Context.CONNECTIVITY_SERVICE);if(State.CONNECTED==connectivity.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState())  return true;if(State.CONNECTED==connectivity.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState())  return true;else        return false;    }

Six States:
Public static final networkinfo. State connected

Public static final networkinfo. State connecting

Public static final networkinfo. State disconnected

Public static final networkinfo. State Disconnecting

Public static final networkinfo. State susponded

Public static final networkinfo. State unknown