content: /*
   * Copyright  2017 [AllenCoder]
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.allen.apputils;
  
  import android.app.Activity;
  import android.content.ComponentName;
  import android.content.Context;
  import android.content.Intent;
  import android.net.ConnectivityManager;
  import android.net.NetworkInfo;
  
  public class NetUtils {
      private NetUtils() {
          /* cannot be instantiated */
          throw new UnsupportedOperationException("cannot be instantiated");
      }
  
      /**
       * 判断网络是否连接
       *
       * @return
       */
      public static boolean isConnected(Context context) {
  
          ConnectivityManager connectivity = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  
          if (null != connectivity) {
  
              NetworkInfo info = connectivity.getActiveNetworkInfo();
              if (null != info && info.isConnected()) {
                  if (info.getState() == NetworkInfo.State.CONNECTED) {
                      return true;
                  }
              }
          }
          return false;
      }
  
      /**
       * 判断是否是wifi连接
       */
      public static boolean isWifi(Context context) {
          ConnectivityManager cm = (ConnectivityManager) context
                  .getSystemService(Context.CONNECTIVITY_SERVICE);
  
          if (cm == null)
              return false;
          return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;
  
      }
  
      /**
       * 打开网络设置界面
       */
      public static void openSetting(Activity activity) {
          Intent intent = new Intent("/");
          ComponentName cm = new ComponentName("com.android.settings",
                  "com.android.settings.WirelessSettings");
          intent.setComponent(cm);
          intent.setAction("android.intent.action.VIEW");
          activity.startActivityForResult(intent, 0);
      }
  
  }
  