Android 判断网络状态实例详解

2024-02-25 21:53:03 59
Android判断网络状态实例详解
实例代码
packagecom.example.android;

importjava.io.IOException;
importjava.net.HttpURLConnection;
importjava.net.InetAddress;
importjava.net.NetworkInterface;
importjava.net.SocketException;
importjava.net.URL;
importjava.util.Enumeration;

importandroid.content.Context;
importandroid.net.ConnectivityManager;
importandroid.net.NetworkInfo;
importandroid.telephony.TelephonyManager;

publicclassNetStatus{

publicstaticintNET_CNNT_BAIDU_OK=1;//正常访问因特网状态
publicstaticintNET_CNNT_BAIDU_TIMEOUT=2;//无法访问因特网状态
publicstaticintNET_NOT_PREPARE=3;//网络未准备好
publicstaticintNET_ERROR=4;
privatestaticintTIMEOUT=3000;

/**
*返回当前网络状态
*
*@paramcontext
*@return
*/
publicstaticintgetNetState(Contextcontext){
try{
ConnectivityManagerconnectivity=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
if(connectivity!=null){
NetworkInfonetworkinfo=connectivity.getActiveNetworkInfo();
if(networkinfo!=null){
if(networkinfo.isAvailable()&&networkinfo.isConnected()){
if(!connectionNetwork())
returnNET_CNNT_BAIDU_TIMEOUT;
else
returnNET_CNNT_BAIDU_OK;
}else{
returnNET_NOT_PREPARE;
}
}
}
}catch(Exceptione){
}
returnNET_ERROR;
}

/**
*拼百度地址
*
*@return
*/
privatestaticbooleanconnectionNetwork(){
booleanresult=false;
HttpURLConnectionhttpUrl=null;
try{
httpUrl=(HttpURLConnection)newURL("http://www.baidu.com").openConnection();
httpUrl.setConnectTimeout(TIMEOUT);
httpUrl.connect();
result=true;
}catch(IOExceptione){
}finally{
if(null!=httpUrl){
httpUrl.disconnect();
}
httpUrl=null;
}
returnresult;
}

/**
*判断当前网络是否是3G网络
*
*@paramcontext
*@returnboolean
*/
publicstaticbooleanis3G(Contextcontext){
ConnectivityManagerconnectivityManager=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfoactiveNetInfo=connectivityManager.getActiveNetworkInfo();
if(activeNetInfo!=null&&activeNetInfo.getType()==ConnectivityManager.TYPE_MOBILE){
returntrue;
}
returnfalse;
}

/**
*判断当前网络是否是wifi网络
*
*@paramcontext
*@returnboolean
*/
publicstaticbooleanisWifi(Contextcontext){
ConnectivityManagerconnectivityManager=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfoactiveNetInfo=connectivityManager.getActiveNetworkInfo();
if(activeNetInfo!=null&&activeNetInfo.getType()==ConnectivityManager.TYPE_WIFI){
returntrue;
}
returnfalse;
}

/**
*判断当前网络是否是2G网络
*
*@paramcontext
*@returnboolean
*/
publicstaticbooleanis2G(Contextcontext){
ConnectivityManagerconnectivityManager=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfoactiveNetInfo=connectivityManager.getActiveNetworkInfo();
if(activeNetInfo!=null&&(activeNetInfo.getSubtype()==TelephonyManager.NETWORK_TYPE_EDGE
||activeNetInfo.getSubtype()==TelephonyManager.NETWORK_TYPE_GPRS
||activeNetInfo.getSubtype()==TelephonyManager.NETWORK_TYPE_CDMA)){
returntrue;
}
returnfalse;
}

/**
*wifi是否打开
*/
publicstaticbooleanisWifiEnabled(Contextcontext){
ConnectivityManagermgrConn=(ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);
TelephonyManagermgrTel=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
return((mgrConn.getActiveNetworkInfo()!=null&&mgrConn.getActiveNetworkInfo().getState()==NetworkInfo.State.CONNECTED)
||mgrTel.getNetworkType()==TelephonyManager.NETWORK_TYPE_UMTS);
}

/**
*获得本机ip地址
*
*@return
*/
publicstaticStringGetHostIp(){
try{
for(Enumerationen=NetworkInterface.getNetworkInterfaces();en.hasMoreElements();){
NetworkInterfaceintf=en.nextElement();
for(EnumerationipAddr=intf.getInetAddresses();ipAddr.hasMoreElements();){
InetAddressinetAddress=ipAddr.nextElement();
if(!inetAddress.isLoopbackAddress()){
returninetAddress.getHostAddress();
}
}
}
}catch(SocketExceptionex){
}catch(Exceptione){
}
returnnull;
}

/**
*获取本机串号imei
*
*@paramcontext
*@return
*/
publicstaticStringgetIMEI(Contextcontext){
TelephonyManagertelephonyManager=(TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
returntelephonyManager.getDeviceId();
}
}
添加权限：访问网络权限
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Android 判断网络状态实例详解

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