Android: 判斷網路狀態

判斷當前Wifi或Ethernet串連狀態:

 

public static boolean isNetworkConnected(Context context) {ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);NetworkInfo info = cm.getActiveNetworkInfo();if (info != null) {int type = info.getType();if (type == ConnectivityManager.TYPE_WIFI || type == ConnectivityManager.TYPE_ETHERNET) {return info.isAvailable();}} return false;}

BroadcastReceiver中監測Wifi或Ethernet串連狀態:

 

 

if (ConnectivityManager.CONNECTIVITY_ACTION.equals(action)) {Bundle extras = intent.getExtras();if (extras != null) {                NetworkInfo networkInfo =                        (NetworkInfo)extras.get(ConnectivityManager.EXTRA_NETWORK_INFO);                if (networkInfo == null) return;                                State state = networkInfo.getState();                int networkType = networkInfo.getType();            if (networkType == ConnectivityManager.TYPE_WIFI ||                 networkType == ConnectivityManager.TYPE_ETHERNET) {                if (state == State.CONNECTED) {                mListener.onNetworkStateChange(true);                                } else if (state == State.DISCONNECTED) {                mListener.onNetworkStateChange(false);                                }            }                    }}