NetworkUtil.java 文件源码

/**
 * 获取在Mobile网络下的网络类型. 2G,3G,4G
 * 
 * @param context
 * @return
 */
public static int getNetworkClass(Context context) {
    ConnectivityManager connectivityManager = (ConnectivityManager) context
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    if (connectivityManager != null) {
        NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
        if (networkInfo != null) {
            if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
                switch (networkInfo.getSubtype()) {
                case TelephonyManager.NETWORK_TYPE_GPRS:
                case TelephonyManager.NETWORK_TYPE_EDGE:
                case TelephonyManager.NETWORK_TYPE_CDMA:
                case TelephonyManager.NETWORK_TYPE_1xRTT:
                case TelephonyManager.NETWORK_TYPE_IDEN:
                    return NETWORK_CLASS_2_G;
                case TelephonyManager.NETWORK_TYPE_UMTS:
                case TelephonyManager.NETWORK_TYPE_EVDO_0:
                case TelephonyManager.NETWORK_TYPE_EVDO_A:
                case TelephonyManager.NETWORK_TYPE_HSDPA:
                case TelephonyManager.NETWORK_TYPE_HSUPA:
                case TelephonyManager.NETWORK_TYPE_HSPA:
                case 12: // TelephonyManager.NETWORK_TYPE_EVDO_B:
                case 14: // TelephonyManager.NETWORK_TYPE_EHRPD:
                case 15: // TelephonyManager.NETWORK_TYPE_HSPAP:
                    return NETWORK_CLASS_3_G;
                case 13: // TelephonyManager.NETWORK_TYPE_LTE:
                    return NETWORK_CLASS_4_G;
                default:
                    return NETWORK_CLASS_UNKNOWN;
                }
            } else if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
                return NETWORK_CLASS_WIFI;
            }
        }
    }
    return NETWORK_CLASS_UNKNOWN;
}