isNetworkReachable

1private static final String LOG_TAG = DieKlasse.class.getSimpleName();
2
3
4 /**
5 * Returns <code>true</code> when Network is reachable and connected.
6 *
7 * @param _context
8 * @param useRoaming
9 * @return
10 */
11 public static boolean isNetworkReachable(final Context _context,final boolean _useRoaming)
12 {
13 boolean isNetworkReachable = false;
14 final ConnectivityManager systemService = (ConnectivityManager) _context
15 .getSystemService(Context.CONNECTIVITY_SERVICE);
16
17 /**
18 * Avoid NullPointerException when offline
19 */
20 if (systemService.getActiveNetworkInfo() == null)
21 {
22 Log.i(LOG_TAG, "Network not reachable!");
23 return false;
24 }
25
26 final NetworkInfo[] infos = systemService.getAllNetworkInfo();
27 boolean userWantIOWhileRoaming = useRoaming;
28 for (final NetworkInfo info : infos)
29 {
30 if (info != null)
31 {
32 if (info.isConnectedOrConnecting())
33 {
34 final State networkState = info.getState();
35 final boolean isRoamingNow = info.isRoaming();
36 if (State.CONNECTED == networkState || State.CONNECTING == networkState)
37 {
38 //if (Logging.isEnabled)
39 {
40 Log.i(LOG_TAG, "Using: ");
41 Log.i(LOG_TAG, "NetworkInfo.extraInfo : " + info.getExtraInfo());
42 Log.i(LOG_TAG, "NetworkInfo.reason : " + info.getReason());
43 Log.i(LOG_TAG, "NetworkInfo.subtypeName : " + info.getSubtypeName());
44 Log.i(LOG_TAG, "NetworkInfo.state : " + info.getState());
45 Log.i(LOG_TAG, "NetworkInfo.detailedState : " + info.getDetailedState());
46 Log.i(LOG_TAG, "NetworkInfo.isAvailable : " + info.isAvailable());
47 Log.i(LOG_TAG, "NetworkInfo.isConnected : " + info.isConnected());
48 Log.i(LOG_TAG, "NetworkInfo.isConnectedOrConnecting : " + info.isConnectedOrConnecting());
49 Log.i(LOG_TAG, "NetworkInfo.isFailover : " + info.isFailover());
50 Log.i(LOG_TAG, "NetworkInfo.isRoaming : " + info.isRoaming());
51 }
52 if (userWantIOWhileRoaming)
53 {
54 isNetworkReachable = true;
55 break;
56 }
57 else
58 {
59 isNetworkReachable = isRoamingNow ? false : true;
60 break;
61 }
62 }
63 }
64 }
65 }
66 return isNetworkReachable;
67
68 }