GPRS 区分2g/3g/4g网络

[code]/**
 * 区分2g/3g/4gGPRG网络
 * @author Bubble 
 * 
 */

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.provider.SyncStateContract.Constants;
import android.telephony.TelephonyManager;

public class GPRSNetType {
    private static final int NETWORK_TYPE_UN***AILABLE = -1;
    private static final int NETWORK_TYPE_WIFI = -101;

    private static final int NETWORK_CLASS_WIFI = -101;
    private static final int NETWORK_CLASS_UN***AILABLE = -1;
    /** Unknown network class. */
    private static final int NETWORK_CLASS_UNKNOWN = 0;
    private static final int NETWORK_CLASS_2_G = 1;
    private static final int NETWORK_CLASS_3_G = 2;
    private static final int NETWORK_CLASS_4_G = 3;

    // 适配低版本手机
    public static final int NETWORK_TYPE_UNKNOWN = 0;
    public static final int NETWORK_TYPE_GPRS = 1;
    public static final int NETWORK_TYPE_EDGE = 2;
    public static final int NETWORK_TYPE_UMTS = 3;
    public static final int NETWORK_TYPE_CDMA = 4;
    public static final int NETWORK_TYPE_EVDO_0 = 5;
    public static final int NETWORK_TYPE_EVDO_A = 6;
    public static final int NETWORK_TYPE_1xRTT = 7;
    public static final int NETWORK_TYPE_HSDPA = 8;
    public static final int NETWORK_TYPE_HSUPA = 9;
    public static final int NETWORK_TYPE_HSPA = 10;
    public static final int NETWORK_TYPE_IDEN = 11;
    public static final int NETWORK_TYPE_EVDO_B = 12;
    public static final int NETWORK_TYPE_LTE = 13;
    public static final int NETWORK_TYPE_EHRPD = 14;
    public static final int NETWORK_TYPE_HSPAP = 15;

    /**
     * 
     * @param context
     * @return
     */
     static int getNetworkClass(Context context) {
        int networkType = NETWORK_TYPE_UNKNOWN;
        try {
            final NetworkInfo network = ((ConnectivityManager) context
                    .getSystemService(Context.CONNECTIVITY_SERVICE))
                    .getActiveNetworkInfo();
            if (network != null && network.isAvailable()
                    && network.isConnected()) {
                int type = network.getType();
                if (type == ConnectivityManager.TYPE_WIFI) {
                    networkType = NETWORK_TYPE_WIFI;
                } else if (type == ConnectivityManager.TYPE_MOBILE) {
                    TelephonyManager telephonyManager = (TelephonyManager) context
                            .getSystemService(Context.TELEPHONY_SERVICE);
                    networkType = telephonyManager.getNetworkType();
                }
            } else {
                networkType = NETWORK_TYPE_UN***AILABLE;
            }

        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return getNetworkClassByType(networkType);

    }

    /**
     * 根据网络类型区分2g/3g/4g
     * @param networkType
     * @return
     */
    private static int getNetworkClassByType(int networkType) {
        switch (networkType) {
        case NETWORK_TYPE_UN***AILABLE:
            return NETWORK_CLASS_UN***AILABLE;
        case NETWORK_TYPE_WIFI:
            return NETWORK_CLASS_WIFI;
        case NETWORK_TYPE_GPRS:
        case NETWORK_TYPE_EDGE:
        case NETWORK_TYPE_CDMA:
        case NETWORK_TYPE_1xRTT:
        case NETWORK_TYPE_IDEN:
            return  NETWORK_CLASS_2_G 
        case NETWORK_TYPE_UMTS:
        case NETWORK_TYPE_EVDO_0:
        case NETWORK_TYPE_EVDO_A:
        case NETWORK_TYPE_HSDPA:
        case NETWORK_TYPE_HSUPA:
        case NETWORK_TYPE_HSPA:
        case NETWORK_TYPE_EVDO_B:
        case NETWORK_TYPE_EHRPD:
        case NETWORK_TYPE_HSPAP:
            return NETWORK_CLASS_3G 
        case NETWORK_TYPE_LTE:
            return NETWORK_CLASS_4G;
        default:
            return NETWORK_CLASS_UNKNOWN;
        }
    }

    /**
     * 获取当前的网络类型
     * 
     * @param context
     * @return
     */
    public static String getCurrentNetworkType(Context context) {
        int networkClass = getNetworkClass(context);
        String type = "未知";
        switch (networkClass) {
        case NETWORK_CLASS_UN***AILABLE:
            type = "无";
            break;
        case NETWORK_CLASS_WIFI:
            type = "Wi-Fi";
            break;
        case Constant.NETWORK_CLASS_2G:
            type = "2G";
            break;
        case Constant.NETWORK_CLASS_3G:
            type = "3G";
            break;
        case Constant.NETWORK_CLASS_4G:
            type = "4G";
            break;
        case Constant.NETWORK_CLASS_RESERVE0:
            type = "未知";
            break;
        }
        return type;
    }

}