package com.guorentong.learn.organ.utils;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.telephony.TelephonyManager;import java.util.ArrayList;import java.util.List;public class NetWorkUtils {    //判断网络是否连接    public static boolean isNetWorkAvailable(Context context) {        //网络连接管理器        ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);        //网络信息        NetworkInfo info = connectivityManager.getActiveNetworkInfo();        if (info != null) {            return true;        }        return false;    }    private NetWorkUtils() {        throw new UnsupportedOperationException("u can't instance me...");    }    public static final int NETWORK_WIFI = 1;    // wifi network    public static final int NETWORK_4G = 4;    // "4G" networks    public static final int NETWORK_3G = 3;    // "3G" networks    public static final int NETWORK_2G = 2;    // "2G" networks    public static final int NETWORK_UNKNOWN = 5;    // unknown network    public static final int NETWORK_NO = -1;   // no network    private static final int NETWORK_TYPE_GSM = 16;    private static final int NETWORK_TYPE_TD_SCDMA = 17;    private static final int NETWORK_TYPE_IWLAN = 18;    public static List
    
      typeList = new ArrayList<>();    static {        typeList.add("打开网络设置界面");        typeList.add("获取活动网络信息");        typeList.add("判断网络是否可用");        typeList.add("判断网络是否是4G");        typeList.add("判断wifi是否连接状态");        typeList.add("获取移动网络运营商名称");        typeList.add("获取当前的网络类型");        typeList.add("获取当前的网络类型(WIFI,2G,3G,4G)");    }    /**     * 打开网络设置界面     * 
     
3.0以下打开设置界面
     *     * @param context 上下文     */    public static void openWirelessSettings(Context context) {        if (android.os.Build.VERSION.SDK_INT > 10) {            context.startActivity(new Intent(android.provider.Settings.ACTION_SETTINGS));        } else {            context.startActivity(new Intent(android.provider.Settings.ACTION_WIRELESS_SETTINGS));        }    }    /**     * 获取活动网络信息     *     * @param context 上下文     * @return NetworkInfo     */    public static NetworkInfo getActiveNetworkInfo(Context context) {        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        return cm.getActiveNetworkInfo();    }    /**     * 判断网络是否可用     * 
     
需添加权限 {@code 
      }
     *     * @param context 上下文     * @return {@code true}: 可用
     
{@code false}: 不可用     */    public static boolean isAvailable(Context context) {        NetworkInfo info = getActiveNetworkInfo(context);        return info != null && info.isAvailable();    }    /**     * 判断网络是否连接     * 
     
需添加权限 {@code 
      }
     *     * @param context 上下文     * @return {@code true}: 是
     
{@code false}: 否     */    public static boolean isConnected(Context context) {        NetworkInfo info = getActiveNetworkInfo(context);        return info != null && info.isConnected();    }    /**     * 判断网络是否是4G     * 
     
需添加权限 {@code 
      }
     *     * @param context 上下文     * @return {@code true}: 是
     
{@code false}: 不是     */    public static boolean is4G(Context context) {        NetworkInfo info = getActiveNetworkInfo(context);        return info != null && info.isAvailable() && info.getSubtype() == TelephonyManager.NETWORK_TYPE_LTE;    }    /**     * 判断wifi是否连接状态     * 
     
需添加权限 {@code 
      }
     *     * @param context 上下文     * @return {@code true}: 连接
     
{@code false}: 未连接     */    public static boolean isWifiConnected(Context context) {        ConnectivityManager cm = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        if (cm == null)            return false;        return cm != null && cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;    }    /**     * 获取移动网络运营商名称     * 
     
如中国联通、中国移动、中国电信
     *     * @param context 上下文     * @return 移动网络运营商名称     */    public static String getNetworkOperatorName(Context context) {        TelephonyManager tm = (TelephonyManager) context                .getSystemService(Context.TELEPHONY_SERVICE);        return tm != null ? tm.getNetworkOperatorName() : null;    }    /**     * 获取移动终端类型     *     * @param context 上下文     * @return 手机制式     * 
     
           * 
      
{@link TelephonyManager#PHONE_TYPE_NONE } : 0 手机制式未知
     * 
      
{@link TelephonyManager#PHONE_TYPE_GSM  } : 1 手机制式为GSM，移动和联通
     * 
      
{@link TelephonyManager#PHONE_TYPE_CDMA } : 2 手机制式为CDMA，电信
     * 
      
{@link TelephonyManager#PHONE_TYPE_SIP  } : 3
     * 
     
     */    public static int getPhoneType(Context context) {        TelephonyManager tm = (TelephonyManager) context                .getSystemService(Context.TELEPHONY_SERVICE);        return tm != null ? tm.getPhoneType() : -1;    }    /**     * 获取当前的网络类型(WIFI,2G,3G,4G)     * 
     
需添加权限 {@code 
      }
     *     * @param context 上下文     * @return 网络类型     * 
     
           * 
      
{@link #NETWORK_WIFI   } = 1;
     * 
      
{@link #NETWORK_4G     } = 4;
     * 
      
{@link #NETWORK_3G     } = 3;
     * 
      
{@link #NETWORK_2G     } = 2;
     * 
      
{@link #NETWORK_UNKNOWN} = 5;
     * 
      
{@link #NETWORK_NO     } = -1;
     * 
     
     */    public static int getNetWorkType(Context context) {        int netType = NETWORK_NO;        NetworkInfo info = getActiveNetworkInfo(context);        if (info != null && info.isAvailable()) {            if (info.getType() == ConnectivityManager.TYPE_WIFI) {                netType = NETWORK_WIFI;            } else if (info.getType() == ConnectivityManager.TYPE_MOBILE) {                switch (info.getSubtype()) {                    case NETWORK_TYPE_GSM:                    case TelephonyManager.NETWORK_TYPE_GPRS:                    case TelephonyManager.NETWORK_TYPE_CDMA:                    case TelephonyManager.NETWORK_TYPE_EDGE:                    case TelephonyManager.NETWORK_TYPE_1xRTT:                    case TelephonyManager.NETWORK_TYPE_IDEN:                        netType = NETWORK_2G;                        break;                    case NETWORK_TYPE_TD_SCDMA:                    case TelephonyManager.NETWORK_TYPE_EVDO_A:                    case TelephonyManager.NETWORK_TYPE_UMTS:                    case TelephonyManager.NETWORK_TYPE_EVDO_0:                    case TelephonyManager.NETWORK_TYPE_HSDPA:                    case TelephonyManager.NETWORK_TYPE_HSUPA:                    case TelephonyManager.NETWORK_TYPE_HSPA:                    case TelephonyManager.NETWORK_TYPE_EVDO_B:                    case TelephonyManager.NETWORK_TYPE_EHRPD:                    case TelephonyManager.NETWORK_TYPE_HSPAP:                        netType = NETWORK_3G;                        break;                    case NETWORK_TYPE_IWLAN:                    case TelephonyManager.NETWORK_TYPE_LTE:                        netType = NETWORK_4G;                        break;                    default:                        String subtypeName = info.getSubtypeName();                        if (subtypeName.equalsIgnoreCase("TD-SCDMA")                                || subtypeName.equalsIgnoreCase("WCDMA")                                || subtypeName.equalsIgnoreCase("CDMA2000")) {                            netType = NETWORK_3G;                        } else {                            netType = NETWORK_UNKNOWN;                        }                        break;                }            } else {                netType = NETWORK_UNKNOWN;            }        }        return netType;    }    /**     * 获取当前的网络类型(WIFI,2G,3G,4G)     * 
     
依赖上面的方法
     *     * @param context 上下文     * @return 网络类型名称     * 
     
           * 
      
NETWORK_WIFI   
     * 
      
NETWORK_4G     
     * 
      
NETWORK_3G     
     * 
      
NETWORK_2G     
     * 
      
NETWORK_UNKNOWN
     * 
      
NETWORK_NO     
     * 
     
     */    public static String getNetWorkTypeName(Context context) {        switch (getNetWorkType(context)) {            case NETWORK_WIFI:                return "NETWORK_WIFI";            case NETWORK_4G:                return "NETWORK_4G";            case NETWORK_3G:                return "NETWORK_3G";            case NETWORK_2G:                return "NETWORK_2G";            case NETWORK_NO:                return "NETWORK_NO";            default:                return "NETWORK_UNKNOWN";        }    }}
    

调用

//判断是否有网络if (NetWorkUtils.isNetWorkAvailable(this))

//判断是否是wifiif (!NetWorkUtils.isWifiConnected(this))

等