Zhao Yazhi _android_ Network Operation Tool Class

Package Com.cards.basic.util;import Java.io.bytearrayoutputstream;import Java.io.ioexception;import Java.io.inputstream;import Java.io.outputstream;import Java.net.httpurlconnection;import Java.net.malformedurlexception;import Java.net.url;import Android.content.context;import Android.net.connectivitymanager;import Android.net.networkinfo;import com.cards.commom.common;/** * @explaination Network Operation Tool Class * @author Yazhizhao * @time 2014-7-7 pm 3:35:32 */public class Httputil {private static httputil instance;private Ht Tpurlconnection conn;private inputstream is;private outputstream os;public static Httputil getInstance (context context) {if (instance = = null) {instance = new Httputil (context);} return instance;} Private final static int TIMEOUT = 30 * 1000;/** * Log tool label */private static String tag = "Httputil";/** * Contextual Context */private C Ontext context;/** * Construction Method * * @param context * Contextual environment */public Httputil (contexts context) {This.context = Contex t;} /** * * @explaination service sends an HTTP request * @auThor Yazhizhao * @time 2014-7-7 pm 3:36:36 * @param urlpath * @return * @throws Exception */public String postaccessserver (S Tring URLPath, String requestjsonstr) {Common.log ("url =" + URLPath); Common.log ("requestjsonstr =" + requestjsonstr); String result = null; URL url = null;conn = Null;os = null;try {url = new URL (urlpath), if (conn = = NULL) {conn = (httpurlconnection) Url.opencon Nection ();} Conn.setconnecttimeout (timeout); Conn.setreadtimeout (timeout); Conn.setdoinput (true); Conn.setdooutput (true); Conn.setrequestmethod ("POST"); Conn.setusecaches (false); Conn.setrequestproperty ("Connection", "keep-alive"); Conn.setrequestproperty ("Charset", "UTF-8"), if (requestjsonstr! = null) {byte[] dataupdate = Requestjsonstr.getbytes (" UTF-8 "); OS = Conn.getoutputstream (); Os.write (dataupdate);} Bytearrayoutputstream BAOs = new Bytearrayoutputstream (); is = Conn.getinputstream (); byte[] temp = new Byte[256];int len = 0;while (len = is.read (temp))! =-1) {baos.write (temp, 0, len);} byte[] Dataresult = Baos.tobyTearray (); Common.log ("Data Length =" + dataresult.length); if (Dataresult! = NULL | |! "". Equals (Dataresult)) {result = new String (Dataresult, "UTF-8");} Is.close (); is = null;if (OS! = null) {os.close (); OS = null;} conn = Null;url = null;} catch (Malformedurlexception e) {Common.log ("malformedurlexception =" + e.tostring ());} catch (IOException e) {Common.log ("IOException =" + e.tostring ());} catch (Exception e) {Common.log ("Exception =" + e.tostring ());} Common.log ("result =" + result); Common.log ("Stop at Httputil"); return result;} /** * * @explaination determine if the network is available * @author Yazhizhao * @time 2014-7-7 pm 3:37:20 * @param context * @return */public static B Oolean isnetworkavailable (Context context) {Boolean flag = false; Connectivitymanager Localconnectivitymanager = (Connectivitymanager) context.getapplicationcontext (). Getsystemservice (Context.connectivity_service); if (Localconnectivitymanager! = null) {try {Networkinfo Localnetworkinfo = Localconnectivitymanager.getactivenetworkinfo (); if ((Localnetworkinfo = = null) | | (!localnetworkinfo.isavailable ())) Flag = false;//Unavailable Elseflag = true;//available} catch (Exception e) {e.printstacktrace (); flag = false;}}   return flag;} /** * Force Disconnect * * @return */public boolean killconnection () {try {if (is! = null) {Is.close (); is = null;} if (OS! = null) {os.close (); OS = null;} IF (conn! = null) {conn.disconnect (); conn = null;}} catch (Exception e) {return false;} return true;}}