Submission data for Android Day05-network programming

<span id="Label3"></p><p><p><span style="font-size:20px;color:rgb(112,48,160);"><strong><span style="font-size:20px;">I. Submission of data</span></strong></span></p></p><p><p>The principle of submitting data to the server by the mobile app is the same as when the Web page submits data to the server, relying on the HTTP association</p></p><p><p>The API is Different.<br></p></p><p><p>There are 3 classes of Android's most common submission Data: httpurlconnection, HttpClient, asynchttpclient, which</p></p><p><p>We all divide get and post two ways of submission where httpurlconnection is the Sdk's own class; HttpClient was originally a 3rd party open source</p></p><p><p>project, but was included in Google Sdk;asynchttpclient is a particularly simple to use 3rd party open source projects, need to go</p></p><p><p>GitHub downloads the jar Package.</p></p><p><p><br></p></p><p><p>I've Integrated 6 different submissions, and the App UI interface looks like This:</p></p><p><p>650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/6F/EC/wKiom1WtJVaQGXG-AACHnYU0azU088.jpg "title=" Device-2015-07-21-004428.png "alt=" wkiom1wtjvaqgxg-aachnyu0azu088.jpg "/><br></p></p><p><p>Here are the source code for submitting data in 6 different ways:</p></p><p><p><span style="color:rgb(255,0,0);">1) urlget Mode</span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">Urlget is characterized by stitching the request parameters directly behind the submission Address.</span><br></span></p></p><pre class="brush:java;toolbar:false">        // 1-in Urlget Way Public void loginbyurlget ()  {new thread ()  {public void run ()  {//  if username and account are not empty if  (checkempty ())  {//  has got the username and password, just take it with YOU. string servletpath =  "http://192.168.17.71/QQCenter/login";//  Stitching Address (********* Important step ********** ) string urlpath = servletpath +  "username="  + username+  "& password= " + password;try {//  1th step: Create Urlurl url = new url (urlpath);//   2nd step: Create httpurlconnection connection httpurlconnection conn =  (httpurlconnection)   Url.openconnection ();//  3rd step: Set Request parameters Conn.setrequestmethod ("GET"); Conn.setreadtimeout (5);//  4th step: Get Response code Int responsecode = conn.getresponsecode ();//  5th step: Determine the response code if  (responsecode  == 200)  {//  Get the server-side return information Inputstream in = conn.getinputstream (); string content = Netutils.readstream (in); Showtoast (content); System.out.println ("urlget Mode landing");  else {showtoast ("the Server cannot find a resource");}}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}}}. Start ();}</pre><p><p><span style="color:rgb(255,0,0);">2</span> <span style="color:rgb(255,0,0);">) Urlpost Way</span> <span style="color:rgb(255,0,0);"> </span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">Urlpost is characterized by the submission of the parameters through the stream to the server, compared to the Urlget mode, more than two letterhead</span></span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">and set permissions to write the stream to the Server.</span></span></p></p><pre class="brush:java;toolbar:false">        public void loginbyurlpost ()  {new Thread ()  {public void run ()  {//  If the username and account are not empty if  (checkempty ())  {//  have been given the username password, Just take it and use it directly. string servletpath =  "http://192.168.17.71/QQCenter/login";//the parameters to write to the request Body (******* key step ******** ) string data =  "username="  + username +  "&password=" + password;try  {//  1th step: Create Urlurl url = new url (servletpath);//  2nd step: Create httpurlconnection connection httpurlconnection conn =  (httpurlconnection)  url.openconnection () ;//  3rd step: Set request parameter Conn.setrequestmethod ("POST") conn.setreadtimeout (5);//  Note Set two request header information (* * * * * * * * * * * * * * ) Conn.setrequestproperty ("content-type", "application/x-www-form-urlencoded"); conn.setrequestproperty (" Content-length ",  data.length () + " ");//  Set permissions to write the stream to the server (* * * * * * * * *) conn.setdooutput (true);// Get the output flow to the server to send the request body Data (* * * * * key steps ******) Outputstream ouT = conn.getoutputstream (); out.write (data.getbytes ()); out.close ();//  4th step: Get the response code int  Responsecode = conn.getresponsecode ();//  5th step: Judgment Response Code if  (responsecode == 200)   {//  Gets the server-side return information Inputstream in = conn.getinputstream (); String content = netutils.readstream (in); showtoast (content); in.close (); System.out.println ("landed in Urlpost mode");  else {showtoast ("the Server cannot find a resource");}}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}}}. Start ();}</pre><p><p><span style="color:rgb(255,0,0);"></span><span style="color:rgb(255,0,0);">3) Clientget</span> <span style="color:rgb(255,0,0);">Way</span> <span style="color:rgb(255,0,0);"> </span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">HttpClient This class, there are many differences compared to the httpurlconnection syntax. Package requests and responses separately</span></span></p></p><p><p><span style="color:rgb(0,0,0);">into</span> a class. Get the server data is a <span style="text-decoration:underline;color:rgb(255,0,0);">multilayer wrapper</span> , need to get the data of the entity httpentity, according to the entity</p></p><p><p>Then get the output stream of the Server.</p></p><pre class="brush:java;toolbar:false">        public void loginbyclientget ()  {new Thread ()  {public void run ()  {//  if the username and account are not empty if  (checkempty ())  {//  have been given the username and password, Just take it and use it directly. string servletpath =  "http://192.168.17.71/QQCenter/login";//  Stitching Address string data =   "username="  + username +  "&password=" + password; string url = servletpath +  "?"  + data;try {//  1th step: Create HttpClient object httpclient client = new  Defaulthttpclient ();//  2nd step: Create a GET Request object Httpget get = new httpget (url);//  3rd step: Execute GET request object, get response Object. Httpresponse response = client.execute (get);//  4th step: Get the response code int responsecode =  Response.getstatusline (). getstatuscode ();//  5th step: Determine the response code if  (RESPONSECODE&NBSP;==&NBSP;200)  {//   Get server-side return information   Unlike  url, you get the data entity First. Httpentity entity = reSponse.getentity ();//  The output stream inputstream in = entity.getcontent () that gets the service from the data entity; String content = netutils.readstream (in); showtoast (content); in.close (); System.out.println ("landed in Clientget mode");  else {showtoast ("the Server cannot find a resource");}}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}}}. Start ();}</pre><p><p><span style="color:rgb(255,0,0);"></span><span style="color:rgb(255,0,0);">4</span> <span style="color:rgb(255,0,0);">) Clientpost</span> <span style="color:rgb(255,0,0);">Way</span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">in a relatively clientget way, submitting data in this way is slightly more complex. When you create the Entity data for a post request, you</span></span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="color:rgb(0,0,0);">Too many layers of packaging.</span><br></span></p></p><pre class="brush:java;toolbar:false">            public void  Loginbyclientpost ()  {new thread ()  {public void run ()  {//  If the user name and account number are not empty if   (checkempty ())  {//  already got username and password, just take it with YOU. string servletpath =  "http://192.168.17.71/QQCenter/login";//  Request body Data string data =   "username="  + username +  "&password=" + password; string url = servletpath;try {//  1th step: Create HttpClient object httpclient client =  new defaulthttpclient ();//  2nd step: Create a POST request object Httppost post = new httppost (url) ;//  the process of encapsulating the request parameters into the entity------a little more complicated list<namevaluepair> listpairs = new arraylist< Namevaluepair> ();                           //note that the value of name should be unified with the server   namevaluepair  pair1&Nbsp;= new basicnamevaluepair ("username",  username); Namevaluepair pair2 = new basicnamevaluepair ("password",  password); ListPairs.add ( pair1); Listpairs.add (pair2); Httpentity postdataentity = new urlencodedformentity (listpairs);p ost.setentity ( postdataentity);//  3rd step: perform POST request Httpresponse response = client.execute (post);//  4th step: Get the status code int statuscode = response.getstatusline (). getstatuscode ();//  5th step: Determine the status code if  ( STATUSCODE&NBSP;==&NBSP;200)  {//  entity httpentity respentity = response.getentity () to get data ;//  from the entity to get flow inputstream in = respentity.getcontent (); String content = netutils.readstream (in); showtoast (content); in.close (); System.out.println ("landed in Clientpost mode");  else {showtoast ("resource not found");}}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}};}. Start ();}</pre><p><p><span style="color:rgb(255,0,0);"></span><span style="color:rgb(255,0,0);">5</span> <span style="color:rgb(255,0,0);">) Asynchttpclientget</span> <span style="color:rgb(255,0,0);">Way</span></p></p><p><p><span style="color:rgb(255,0,0);"></span> before using this class, go to GitHub to download and guide this package com.loopj.android.http to the Project's src target</p></p><p><p>Recorded. There is also a very cool place to use asynchttpclient, which is that this class does not need to be used in child threads, so</p></p><p><p>You can also update the UI Directly. The request address directly writes the servlet, and does not need to splice parameters, because the parameters are written in the</p></p><p><p>Requestparams to the Object.</p></p><pre class="brush:java;toolbar:false">        public void loginbyasynchttpclientget ()  {//   If the user name and account is not empty if  (checkempty ())  {//  has been given a username password, just take it with YOU. string servletpath =  "http://192.168.1.109/QQCenter/login";try {asynchttpclient  Asynchttpclient = new asynchttpclient ();//create GET Request Parameters  RequestParams params =  New requestparams ();  params.put ("username",  username);  params.put ("password",  password); Asynchttpclient.get (getapplicationcontext (), servletpath, params, new  Asynchttpresponsehandler () {//request Success @overridepublic void onsuccess (int statuscode, header[]  headers,byte[] responsebody)  {if (statuscode == 200) {//get The return value of the server  String  Content = new string (responsebody); Toast.maketext (getapplicationcontext (),  content, 0). show (); System.out.println ("asynchttpclientget Mode landing"); Else{toast.maketext (geTapplicationcontext (),  "resource not found",  0). show ();}} @Overridepublic  void onfailure (int statuscode, header[] headers,byte[]  Responsebody, throwable error)  {// todo auto-generated method stub});}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}}</pre><p><p><span style="color:rgb(255,0,0);">6</span> <span style="color:rgb(255,0,0);">) Asynchttpclientpost</span> <span style="color:rgb(255,0,0);">Way</span></p></p><p><p><span style="color:rgb(255,0,0);"><span style="line-height:0px;"></span> similar to</span> asynchttpclientget, the Post method <span style="line-height:0px;"></span> is Called. The rest of the same<span style="line-height:0px;"></span><span style="color:rgb(255,0,0);"><span style="line-height:0px;"></span><br></span></p></p><pre class="brush:java;toolbar:false">          public void loginbyasynchttpclientpost ()  {//  if the user name and account is not empty if  (checkempty ())  {//  has been given a username password, just take it with YOU. string servletpath =  "http://192.168.17.71/QQCenter/login"; try {// Create Asynchttpclient Object Asynchttpclient asynchttpclient = new asynchttpclient ();  Requestparams params = new requestparams ();  params.put ("username",  username);  params.put ("password",  password); asynchttpclient.post (getapplicationcontext (),  servletpath,  params, new asynchttpresponsehandler () {@Overridepublic  void onsuccess (int  Statuscode, header[] headers,byte[] responsebody)  {if (statuscode == 200) {// Get the return value of the server  string content = new string (responsebody); Toast.maketext (getapplicationcontext (),  content, 0). show (); System.out.println ("asynchttpclientpost Mode landing"); ElsE{toast.maketext (getapplicationcontext (),  "resource not found",  0). show ();}} @Overridepublic  void onfailure (int statuscode, header[] headers,byte[]  Responsebody, throwable error)  {});}  catch  (exception e)  {e.printstacktrace (); showtoast ("server busy!!!" ");}}}</pre><p><p><span style="color:rgb(255,0,0);"><br></span><span style="color:rgb(112,48,160);">How to submit data, so many ways, how to use it? </span><br></p></p><p><p>HttpClient has been replaced by asynchttpclient, which is used in general Development. But when you meet special needs, you still need to<br></p></p><p><p>Use the most basic httpurlconnection, because it can set the parameter information of the request Header.<br></p></p><p><p><br></p></p><p><p><strong style="color:rgb(112,48,160);font-size:20px;white-space:normal;">second, the problem of Chinese garbled when submitting data</strong></p></p><p><p>For further understanding<br></p></p><p><p>This article is from the "line of the world" blog, please be sure to keep this source http://4259297.blog.51cto.com/4249297/1676565</p></p><p><p>Submission data for Android Day05-network programming</p></p></span>