Android 网络工具类，android网络工具类,public class

Android 网络工具类，android网络工具类,public class

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 &amp;&amp; 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                  &amp;&amp; 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                  &amp;&amp; activeNetInfo.getType() == ConnectivityManager.TYPE_MOBILE) {               return true;           }           return false;       }   }