Android中判断网络连接状态



网络androidstringnull中国移动wap
最近做项目，用到判断网络连接状态，于是想写个能兼容多种网络模式的判断工具，如下直接上代码

import java.util.Hashtable;

import android.content.Context;

import android.net.ConnectivityManager;

import android.net.NetworkInfo;

import android.net.NetworkInfo.DetailedState;

import android.util.Log;

import com.rk.jcz.util.FeedBackException;

/**

*

* @author 刘伟

* @date 2012-04-02

* @QQ 574613441

*/

public class NetConnectManager {

private static final String LOG_TAG = "NetConnectManager" ;

/**

* 中国移动cmwap

*/

public static String CMWAP = "cmwap";

/**

* 中国移动cmnet

*/

public static String CMNET = "cmnet";

//中国联通3GWAP设置 中国联通3G因特网设置 中国联通WAP设置 中国联通因特网设置

//3gwap 3gnet uniwap uninet

/**

* 3G wap 中国联通3gwap APN

*/

public static String GWAP_3 = "3gwap";

/**

* 3G net 中国联通3gnet APN

*/

public static String GNET_3="3gnet";

/**

* uni wap 中国联通uni wap APN

*/

public static String UNIWAP="uniwap";

/**

* uni net 中国联通uni net APN

*/

public static String UNINET="uninet";

/**

* 电信APN列表

* @author wudongdong

*

*/

public static final String CTWAP="ctwap";

public static final String CTNET="ctnet";

private static Hashtable<String,String> networkTable = new Hashtable<String,String>();

public static void switchNetType(Context context,String from,String to){

}

public static boolean isNetWorkAvailable(Context context) {

boolean isAvailable = false ;

ConnectivityManager connectivityManager = (ConnectivityManager) context

.getSystemService(Context.CONNECTIVITY_SERVICE);

if(connectivityManager!=null){

NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

if(networkInfo!=null){

DetailedState detailedState = networkInfo.getDetailedState();

String detailedName = detailedState.name();

if(detailedName==null){

detailedName = "";

}

networkTable.put("detailedName", detailedName);

String extraInfo = networkInfo.getExtraInfo();

if(extraInfo==null){

extraInfo = "";

}

networkTable.put("extraInfo", extraInfo);

String reason = networkInfo.getReason();

if(reason==null){

reason = "";

}

networkTable.put("reason", reason);

NetworkInfo.State state = networkInfo.getState();

String stateName = "";

if(state!=null && state.name()!=null){

stateName=state.name();

}

// 经过多次测试，只有stateName可以准确的判断网络连接是否正常

if("CONNECTED".equalsIgnoreCase(stateName)){

isAvailable = true ;

}

networkTable.put("stateName", stateName);

int subType = networkInfo.getSubtype();

networkTable.put("subType", subType+"");

String subtypeName = networkInfo.getSubtypeName();

if(subtypeName==null){

subtypeName = "";

}

networkTable.put("subtypeName", subtypeName);

int type = networkInfo.getType();

String typeName = networkInfo.getTypeName();

if(typeName==null){

typeName = "";

}

networkTable.put("typeName", typeName);

Log.d(LOG_TAG,getLogString());

}

}

return isAvailable;

}

public static String getLogString(){

StringBuilder sb = new StringBuilder();

sb.append("detailedName="+networkTable.get("detailedName"));

sb.append(" extraInfo="+networkTable.get("extraInfo"));

sb.append(" reason="+networkTable.get("reason"));

sb.append(" stateName="+networkTable.get("stateName"));

sb.append(" subtypeName="+networkTable.get("subtypeName"));

sb.append(" typeName="+networkTable.get("typeName"));

return sb.toString();

}

public static String apnType(){

String apn = "" ;

String netType = networkTable.get("typeName");

if("CONNECTED".equals(networkTable.get("stateName"))){

if("wifi".equalsIgnoreCase(netType)){

apn = netType;

}else if("mobile".equalsIgnoreCase(netType)){

netType = networkTable.get("extraInfo").toLowerCase();

apn = matchAPN(netType);

}else{

new FeedBackException("UNKNOW networkType:::"+getLogString());

}

}else{

}

return apn ;

}

public static String matchAPN(String currentName) {

if("".equals(currentName) || null==currentName){

return "";

}

currentName = currentName.toLowerCase();

if(currentName.startsWith(CMNET))

return CMNET;

else if(currentName.startsWith(CMWAP))

return CMWAP;

else if(currentName.startsWith(GNET_3))

return GNET_3;

else if(currentName.startsWith(GWAP_3))

return GWAP_3;

else if(currentName.startsWith(UNINET))

return UNINET;

else if(currentName.startsWith(UNIWAP))

return UNIWAP;

else if(currentName.startsWith(CTWAP))

return CTWAP;

else if(currentName.startsWith(CTNET))

return CTNET;

else if(currentName.startsWith("default"))

return "default";

else return "";

}

}