源码

 /** Network type is unknown */
    public static final int NETWORK_TYPE_UNKNOWN = 0;
    /** Current network is GPRS */
    public static final int NETWORK_TYPE_GPRS = 1;
    /** Current network is EDGE */
    public static final int NETWORK_TYPE_EDGE = 2;
    /** Current network is UMTS */
    public static final int NETWORK_TYPE_UMTS = 3;
    /** Current network is CDMA: Either IS95A or IS95B*/
    public static final int NETWORK_TYPE_CDMA = 4;
    /** Current network is EVDO revision 0*/
    public static final int NETWORK_TYPE_EVDO_0 = 5;
    /** Current network is EVDO revision A*/
    public static final int NETWORK_TYPE_EVDO_A = 6;
    /** Current network is 1xRTT*/
    public static final int NETWORK_TYPE_1xRTT = 7;
    /** Current network is HSDPA */
    public static final int NETWORK_TYPE_HSDPA = 8;
    /** Current network is HSUPA */
    public static final int NETWORK_TYPE_HSUPA = 9;
    /** Current network is HSPA */
    public static final int NETWORK_TYPE_HSPA = 10;
    /** Current network is iDen */
    public static final int NETWORK_TYPE_IDEN = 11;
    /** Current network is EVDO revision B*/
    public static final int NETWORK_TYPE_EVDO_B = 12;
    /** Current network is LTE */
    public static final int NETWORK_TYPE_LTE = 13;
    /** Current network is eHRPD */
    public static final int NETWORK_TYPE_EHRPD = 14;
    /** Current network is HSPA+ */
    public static final int NETWORK_TYPE_HSPAP = 15;