Android 怎麼判斷手機是否聯網

[java]

1. import android.content.Context;
2. import android.net.ConnectivityManager;
3. import android.net.NetworkInfo;
5. public class NetHelper {
6. //是否聯網網絡
7. public static boolean IsHaveInternet(final Context context) {
8. try {
9. ConnectivityManager manger = (ConnectivityManager)
10. context.getSystemService(Context.CONNECTIVITY_SERVICE);
12. NetworkInfo info = manger.getActiveNetworkInfo();
13. return (info!=null && info.isConnected());
14. } catch (Exception e) {
15. return false;
16. }
17. }
18. }