android网络监测

12年前 
public class NetworkCheck {   /**         * 网络是否可用         */    public static boolean isNetworkAvailable(Context context) {       ConnectivityManager connectivity = (ConnectivityManager) context                      .getSystemService(Context.CONNECTIVITY_SERVICE);          if (connectivity == null) {          } 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;      }         /**         * wifi是否打开         */      public static boolean isWifiEnabled(Context context) {       ConnectivityManager mgrConn = (ConnectivityManager) context                      .getSystemService(Context.CONNECTIVITY_SERVICE);          TelephonyManager mgrTel = (TelephonyManager) context                      .getSystemService(Context.TELEPHONY_SERVICE);          return ((mgrConn.getActiveNetworkInfo() != null && mgrConn                      .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel                      .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);   }       /**         * 判断当前网络是否是wifi网络         * if(activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE) { //判断3G网         *          * @param context         * @return boolean         */         public static boolean isWifi(Context context) {             ConnectivityManager connectivityManager = (ConnectivityManager) context                     .getSystemService(Context.CONNECTIVITY_SERVICE);             NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();             if (activeNetInfo != null                     && activeNetInfo.getType() == ConnectivityManager.TYPE_WIFI) {                 return true;             }             return false;         }               /**         * 判断当前网络是否是3G网络         *          * @param context         * @return boolean         */         public static boolean is3G(Context context) {             ConnectivityManager connectivityManager = (ConnectivityManager) context                     .getSystemService(Context.CONNECTIVITY_SERVICE);             NetworkInfo activeNetInfo = connectivityManager.getActiveNetworkInfo();             if (activeNetInfo != null                     && activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {                 return true;             }             return false;         }       }