网络判断

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

public class NetWorkUtils {
public static final int G3 = 3;// 3G
public static final int G2 = 2;// 2G
public static final int G4 = 4;// 4G
public static final int WIFI = 5;// WIFI
public static final int NO = 0;

public static int GetNetworkType(Context context) {
int strNetworkType = NO;
NetworkInfo networkInfo = ((ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE))
.getActiveNetworkInfo();
if (networkInfo != null && networkInfo.isConnected()) {
if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
strNetworkType = WIFI;
} else if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
String _strSubTypeName = networkInfo.getSubtypeName();

// Log.e("cocos2d-x", "Network getSubtypeName : " +
// _strSubTypeName);

// TD-SCDMA networkType is 17
int networkType = networkInfo.getSubtype();
switch (networkType) {
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: // api<8 : replace by
// 11
strNetworkType = G2;
break;
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 TelephonyManager.NETWORK_TYPE_EVDO_B: // api<9 : replace by
// 14
case TelephonyManager.NETWORK_TYPE_EHRPD: // api<11 : replace by
// 12
case TelephonyManager.NETWORK_TYPE_HSPAP: // api<13 : replace by
// 15
strNetworkType = G3;
break;
case TelephonyManager.NETWORK_TYPE_LTE: // api<11 : replace by
// 13
strNetworkType = G4;
break;
default:
// http://baike.baidu.com/item/TD-SCDMA 涓浗绉诲姩 鑱旈� 鐢典俊 涓夌3G鍒跺紡
if (_strSubTypeName.equalsIgnoreCase("TD-SCDMA")
|| _strSubTypeName.equalsIgnoreCase("WCDMA")
|| _strSubTypeName.equalsIgnoreCase("CDMA2000")) {
strNetworkType = G3;
} else {
strNetworkType = NO;
}

break;
}

}
}

return strNetworkType;
}
}

private void wangLuoPanDuan() {
// TODO Auto-generated method stub
int type = NetWorkUtils.GetNetworkType(Login.this);

if(NetWorkUtils.WIFI == type){
Toast.makeText(Login.this, "WIFI", 0).show();
}else if(NetWorkUtils.G4 == type){
Toast.makeText(Login.this, "4G", 0).show();
}else if(NetWorkUtils.G3 == type){
Toast.makeText(Login.this, "3G", 0).show();
}else if(NetWorkUtils.G2 == type){
Toast.makeText(Login.this, "2G", 0).show();
}else if(NetWorkUtils.NO == type){
Toast.makeText(Login.this, "锟斤拷锟斤拷锟斤拷", 0).show();
}

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>