506_网络状态Util

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网络状态Util

public class NetworkUtil {

//没有网络连接
public static final int NETWORK_NONE = 0;
//wifi连接
public static final int NETWORK_WIFI = 1;
//手机网络数据连接类型
public static final int NETWORK_2G = 2;
public static final int NETWORK_3G = 3;
public static final int NETWORK_4G = 4;
public static final int NETWORK_MOBILE = 5;

//获取网络类型
public static int getNetworkState(Context context) {

//获取系统的网络服务
ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);

//如果当前没有网络
if (null == connManager)
return NETWORK_NONE;

//获取当前网络类型，如果为空，返回无网络
NetworkInfo activeNetInfo = connManager.getActiveNetworkInfo();
if (activeNetInfo == null || !activeNetInfo.isAvailable()) {
return NETWORK_NONE;
}

//判断是不是连接的是不是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;
}
}

//如果不是wifi，则判断当前连接的是运营商的哪种网络2g、3g、4g等
NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
if (null != networkInfo) {
NetworkInfo.State state = networkInfo.getState();
String strSubTypeName = networkInfo.getSubtypeName();
if (null != state) {
if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING) {
switch (activeNetInfo.getSubtype()) {

//如果是2g类型
case TelephonyManager.NETWORK_TYPE_GPRS: // 联通2g
case TelephonyManager.NETWORK_TYPE_CDMA: // 电信2g
case TelephonyManager.NETWORK_TYPE_EDGE: // 移动2g
case TelephonyManager.NETWORK_TYPE_1xRTT:
case TelephonyManager.NETWORK_TYPE_IDEN:
return NETWORK_2G;

//如果是3g类型
case TelephonyManager.NETWORK_TYPE_EVDO_A: // 电信3g
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;

//如果是4g类型
case TelephonyManager.NETWORK_TYPE_LTE:
return NETWORK_4G;

default:
//中国移动联通电信三种3G制式
if (strSubTypeName.equalsIgnoreCase("TD-SCDMA") || strSubTypeName.equalsIgnoreCase("WCDMA") || strSubTypeName.equalsIgnoreCase("CDMA2000")) {
return NETWORK_3G;
} else {
return NETWORK_MOBILE;
}
}
}
}
}

return NETWORK_NONE;
}

//获取网络状态String
public static String getNetworkStateString(Context context) {
int networkState = getNetworkState(context);
switch (networkState) {
case NETWORK_NONE:
return "none";
case NETWORK_WIFI:
return "wifi";
case NETWORK_2G:
return "2G";
case NETWORK_3G:
return "3G";
case NETWORK_4G:
return "4G";
case NETWORK_MOBILE:
return "mobile";
}
return "none";
}
}

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