Android获取网络类型--最新最全版

Posted 2022-12-10 陳英傑

public static String getNetworkState(Context context) 
        ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); // 获取网络服务
        if (null == connManager)  // 为空则认为无网络
            return NETWORK_OTHER;
        
        // 获取网络类型，如果为空，返回无网络
        NetworkInfo activeNetInfo = connManager.getActiveNetworkInfo();
        if (activeNetInfo == null || !activeNetInfo.isAvailable()) 
            return NETWORK_OTHER;
        
        // 判断是否为WIFI
        NetworkInfo wifiInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (null != wifiInfo) 
            NetworkInfo.State state = wifiInfo.getState();
            if (null != state) 
                if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) 
                    return NETWORK_WIFI;
                
            
        
        // 若不是WIFI，则去判断是2G、3G、4G网
        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (telephonyManager == null) return NETWORK_OTHER;
        int networkType = telephonyManager.getNetworkType();
        switch (networkType) 
            /*
             GPRS : 2G(2.5) General Packet Radia Service 114kbps
             EDGE : 2G(2.75G) Enhanced Data Rate for GSM Evolution 384kbps
             UMTS : 3G WCDMA 联通3G Universal Mobile Telecommunication System 完整的3G移动通信技术标准
             CDMA : 2G 电信 Code Division Multiple Access 码分多址
             EVDO_0 : 3G (EVDO 全程 CDMA2000 1xEV-DO) Evolution - Data Only (Data Optimized) 153.6kps - 2.4mbps 属于3G
             EVDO_A : 3G 1.8mbps - 3.1mbps 属于3G过渡，3.5G
             1xRTT : 2G CDMA2000 1xRTT (RTT - 无线电传输技术) 144kbps 2G的过渡,
             HSDPA : 3.5G 高速下行分组接入 3.5G WCDMA High Speed Downlink Packet Access 14.4mbps
             HSUPA : 3.5G High Speed Uplink Packet Access 高速上行链路分组接入 1.4 - 5.8 mbps
             HSPA : 3G (分HSDPA,HSUPA) High Speed Packet Access
             IDEN : 2G Integrated Dispatch Enhanced Networks 集成数字增强型网络 （属于2G，来自维基百科）
             EVDO_B : 3G EV-DO Rev.B 14.7Mbps 下行 3.5G
             LTE : 4G Long Term Evolution FDD-LTE 和 TDD-LTE , 3G过渡，升级版 LTE Advanced 才是4G
             EHRPD : 3G CDMA2000向LTE 4G的中间产物 Evolved High Rate Packet Data HRPD的升级
             HSPAP : 3G HSPAP 比 HSDPA 快些
             */
            // 2G网络
            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:
                return NETWORK_2G;
                // 3G网络
            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:
                return NETWORK_3G;
            // 4G网络
            case TelephonyManager.NETWORK_TYPE_LTE:
            case 19:// 聚波载合 4G+
                return NETWORK_4G;
            // 5G
//            case TelephonyManager.NETWORK_TYPE_NR:// 需要 SdkVersion>=29
            case 20:// 当 SdkVersion<=28 直接写20
                return NETWORK_5G;
            default:
                return NETWORK_OTHER;