android wifi安全检测,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

*

* @return true: 网络可用 ; false: 网络不可用

*/

public boolean isConnectInternet()

{

ConnectivityManager conManager = (ConnectivityManager) test.this

.getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo networkInfo = 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 */

public boolean checkInternetConnection(String strURL, String strEncoding)

{

/* 最多延时n秒若无响应则表示无法联机 */

int intTimeout = 10;

try

{

HttpURLConnection urlConnection = null;

URL url = new URL(strURL);

urlConnection = (HttpURLConnection) url.openConnection();

urlConnection.setRequestMethod("GET");

urlConnection.setDoOutput(true);

urlConnection.setDoInput(true);

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

+ " (compatible; MSIE 6.0; Windows 2000)");

urlConnection.setRequestProperty("Content-type",

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

urlConnection.setConnectTimeout(1000 * intTimeout);

urlConnection.connect();

if (urlConnection.getResponseCode() == 200)

{

return true;

}

else

{

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

return false;

}

}

catch (Exception e)

{

e.printStackTrace();

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

return false;

}

}

/* 自定义BIG5转UTF-8 */

public String big52unicode(String strBIG5)

{

String strReturn = "";

try

{

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

}

catch (Exception e)

{

e.printStackTrace();

}

return strReturn;

}

/* 自定义UTF-8转BIG5 */

public String unicode2big5(String strUTF8)

{

String strReturn = "";

try

{

strReturn = new String(strUTF8.getBytes("UTF-8"), "big5");

}

catch (Exception e)

{

e.printStackTrace();

}

return strReturn;

}