android开发获取网络状态，wifi,wap,2g,3g.工具类(一)

package com.gzcivil.utils;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

public class NetworkUtils {

/** 没有网络 */
public static final int NETWORKTYPE_INVALID = 0;
/** wap网络 */
public static final int NETWORKTYPE_WAP = 1;
/** 2G网络 */
public static final int NETWORKTYPE_2G = 2;
/** 3G和3G以上网络，或统称为快速网络 */
public static final int NETWORKTYPE_3G = 3;
/** USB网络 */
public static final int NETWORKTYPE_USB = 4;
/** wifi网络 */
public static final int NETWORKTYPE_WIFI = 5;

/**
* 获取网络状态，wifi,wap,2g,3g.
*
* @param context
*            上下文
* @return int 网络状态 {@link #NETWORKTYPE_2G},{@link #NETWORKTYPE_3G}, *
*         {@link #NETWORKTYPE_INVALID},{@link #NETWORKTYPE_WAP}*
*         <p>
*         {@link #NETWORKTYPE_WIFI}
*/
public static int getNetWorkType(Context context) {
ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = manager.getActiveNetworkInfo();
int mNetWorkType = 0;
if (networkInfo != null && networkInfo.isConnected()) {
String type = networkInfo.getTypeName();
if (type.equalsIgnoreCase("WIFI")) {
mNetWorkType = NETWORKTYPE_WIFI;
} else if (type.equalsIgnoreCase("usb")) {
mNetWorkType = NETWORKTYPE_USB;
} else if (type.equalsIgnoreCase("MOBILE")) {
@SuppressWarnings("deprecation")
String proxyHost = android.net.Proxy.getDefaultHost();
mNetWorkType = TextUtils.isEmpty(proxyHost) ? (isFastMobileNetwork(context) ? NETWORKTYPE_3G : NETWORKTYPE_2G) : NETWORKTYPE_WAP;
}
} else {
mNetWorkType = NETWORKTYPE_INVALID;
}
return mNetWorkType;
}

private static boolean isFastMobileNetwork(Context context) {
TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
switch (telephonyManager.getNetworkType()) {
case TelephonyManager.NETWORK_TYPE_1xRTT:
return false; // ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_CDMA:
return false; // ~ 14-64 kbps
case TelephonyManager.NETWORK_TYPE_EDGE:
return false; // ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_0:
return true; // ~ 400-1000 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_A:
return true; // ~ 600-1400 kbps
case TelephonyManager.NETWORK_TYPE_GPRS:
return false; // ~ 100 kbps
case TelephonyManager.NETWORK_TYPE_HSDPA:
return true; // ~ 2-14 Mbps
case TelephonyManager.NETWORK_TYPE_HSPA:
return true; // ~ 700-1700 kbps
case TelephonyManager.NETWORK_TYPE_HSUPA:
return true; // ~ 1-23 Mbps
case TelephonyManager.NETWORK_TYPE_UMTS:
return true; // ~ 400-7000 kbps
case TelephonyManager.NETWORK_TYPE_EHRPD:
return true; // ~ 1-2 Mbps
case TelephonyManager.NETWORK_TYPE_EVDO_B:
return true; // ~ 5 Mbps
case TelephonyManager.NETWORK_TYPE_HSPAP:
return true; // ~ 10-20 Mbps
case TelephonyManager.NETWORK_TYPE_IDEN:
return false; // ~25 kbps
case TelephonyManager.NETWORK_TYPE_LTE:
return true; // ~ 10+ Mbps
case TelephonyManager.NETWORK_TYPE_UNKNOWN:
return false;
default:
return false;
}
}
}