Android系统下检测Wifi连接互联网是否正常的代码

/**

*

*判断网络状态是否可用

*

*@returntrue:网络可用;false:网络不可用

*/

public

boolean

isConnectInternet()

{

ConnectivityManagerconManager=(ConnectivityManager)test.

this

.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfonetworkInfo=conManager.getActiveNetworkInfo();

if

(networkInfo==

null

||!networkInfo.isConnected())

{

return

false

;

}

if

(networkInfo.isConnected())

{

return

true

;

}

return

false

;

}

/*检查网络联机是否正常*/

publicbooleancheckInternetConnection(StringstrURL,StringstrEncoding)

{

/*最多延时n秒若无响应则表示无法联机*/

intintTimeout=10;

try

{

HttpURLConnectionurlConnection=null;

URLurl=newURL(strURL);

urlConnection=(HttpURLConnection)url.openConnection();

urlConnection.setRequestMethod("GET");

urlConnection.setDoOutput(true);

urlConnection.setDoInput(true);

urlConnection.setRequestProperty("User-Agent","Mozilla/4.0"

+"(compatible;MSIE6.0;Windows2000)");

urlConnection.setRequestProperty("Content-type",

"text/html;charset="+strEncoding);

urlConnection.setConnectTimeout(1000*intTimeout);

urlConnection.connect();

if(urlConnection.getResponseCode()==200)

{

returntrue;

}

else

{

Log.d("getResponseCode=",urlConnection.getResponseMessage());

returnfalse;

}

}

catch(Exceptione)

{

e.printStackTrace();

Log.d("emessage",e.getMessage());

returnfalse;

}

}

/*自定义BIG5转UTF-8*/

publicStringbig52unicode(StringstrBIG5)

{

StringstrReturn="";

try

{

strReturn=newString(strBIG5.getBytes("big5"),"UTF-8");

}

catch(Exceptione)

{

e.printStackTrace();

}

returnstrReturn;

}

/*自定义UTF-8转BIG5*/

public

Stringunicode2big5(StringstrUTF8)

{

StringstrReturn=

""

;

try

{

strReturn=

new

String(strUTF8.getBytes(

"UTF-8"

),

"big5"

);

}

catch

(Exceptione)

{

e.printStackTrace();

}

return

strReturn;

}