Home Car Wash app---android Client Development Network Framework encapsulation Introduction (i)

Last Update:2015-06-24 Source: Internet

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Home Car Wash app---android Client Development Network Framework encapsulation Introduction (i) the previous article gave you a brief introduction to some of the business, Home Car Wash app---android Client Development preface and business Introduction , this article introduces you to the network box rack, have also learned some of the open source network communication architecture, also probably see some source code, such as afinal, volley, andbase, android-async-http and so on, each have their own advantages and disadvantages, they have also encapsulated some simple network architecture, there are many places need to pay attention to and optimization, here is not posted out caught dead, interested friends can check out the open source projects mentioned above, as well as view the previously organized blogs: Android Open source framework (collation) do the related study, here does not introduce too much. This project uses the communication framework is Android-async-http, has also written an article to its brief introduction,android-async-http Open Source project introduction and the use Method , everybody can simply understand under, In this project, a series of encapsulation is done based on the Schema's request access to the data and the return of the data results. Here to share my ideas and ideas, and everyone to study together. This can be understood for network requests, request---> include (requests , requests, requests, requests fail, request ends ), and the server response to the success of the data, data analysis of the results, storage and other processing, The basic framework is so, the personal feel that there is not perfect, the total feel that the return of the request data can be processed again, further optimization, then how ? I think that, after making the request, the data obtained is expected to be resolved by the completed data, rather than from the return of the results of the resolution, that is, after the request has been completed the result of the data is parsed, and the returned result is already directly the object to Use. in this case, the entire request parsing is much more convenient. So what exactly is the effect? Let's look at a login request example Below:<pre name="code" class="java"><pre name="code" class="java">private void Login (String name,string pwd) {genericdatamanager mdatamanager = genericdatamanager.getinstance ();// General network Management class Requestparams Mparams = requestparameterfactory.getinstance (). login (name, pwd);// Request parameter Management class Mdatamanager.datarequest (0,constants.request.get, requesturl.url_login, mparams,new ResultParser (), this); /execute Network request}</pre></pre> It takes only 3 lines of code to initiate a request, so how do you use it in your Activity? We threw out a irequestcallback request Response Callback interface, which provides three callback methods for the Activity implementation:<pre name="code" class="java"><pre name="code" class="java">/** * Irequestcallback of Washer * Request Response Callback interface * @author Gao_chun */public interface irequestcallback {public void Onreq Ueststart (int requestid);//start request public void onrequestsuccess (int requestid,int statuscode,result<?> Result );//request succeeded, return request id, Status response code, data result (parsed data Object) public void Onrequesterror (int requestid,throwable error);//request error}</pre></pre> note:RequestID is the request id, in order to distinguish which request, for example: an Activity needs to have two or more times of the request, how to distinguish the specific request in the callback? Use RequestID to Differentiate. You only need to implement the interface in the Activity and implement the specific method to get the Data:<pre name="code" class="java">/******************************************************************************* * * Copyright (c) Weaver Info Tech Co. LTD * * loginactivity * * App.ui.activity.LoginActivity.java * todo:file description or class Description. * * @author: Gao_chun * @since: 2015-6-23 * @version: 1.0.0 * * @changeLogs: * 1.0.0:first created this class. * ******************************************************************************/package org.gaochun.activity;/* * * @author Gao_chun * */public class Loginactivity extends titleactivity implements Irequestcallback{public Context Conte xt; @Overrideprotected void onCreate (Bundle Savedinstancestate) {super.oncreate (savedinstancestate); context = this; Initui ();} private void Initui () {setcontentview (r.layout.activity_login); settitle (r.string.text_login);} @Overridepublic void Onrequeststart (int requestid) {//onrequeststart//can be displayed here dialog} @Overridepublic void onrequestsuccess (int requestid, int statusCode, result<?> Result) {//onrequestsuccesslog.i (TAG,result.getmessage () + "--" +result.getstatus () + "--" +result.getdata ());//data printing} @Overridepublic void Onrequesterror ( int requestid, throwable error) {//onrequesterrorlog.e (tag,error.getmessage ());//request failed, error message print}}</pre> Does it feel like it's a simple bright? Say so much, let's take a closer look at the Code. As previously mentioned, there are two ways of using the Framework:The first is to copy the latest jar from the releases package to the Application's Libs DirectoryThe second is to copy the project source in the library to your Application's src directory (this is the second Way) The following is a simple usage of asynchttpclient, which is to create a request<pre name="code" class="java"><pre name="code" class="java">Asynchttpclient client = new Asynchttpclient (); client.get ("http://www.google.com", new Asynchttpresponsehandler () { @Override public void onsuccess (String response) { System.out.println (response); }});</pre></pre> Note: the framework can perform a variety of network requests, including get,put,post,head,delete 。 The introduction of different requests, we do not understand the information can be consulted to understand the relevant differences, here is not introduced. We are dealing with the asynchttpclient class, where the two lines of code appear when the request is executed:<pre name="code" class="java"><pre name="code" class="java">Genericdatamanager Mdatamanager = genericdatamanager.getinstance ();//general Network Management class Mdatamanager.datarequest (0, Constants.REQUEST.GET, requesturl.url_login, mparams,new resultparser (), this);//perform Network requests</pre></pre> What the hell is genericdatamanager ? This class is a generic data request class for encapsulation, given this class, together with annotations you can learn: <pre name="code" class="java">/******************************************************************************* * * Copyright (c) Weaver Info Tech Co. LTD * * DataManager * * * * * * App.backend.manager.DataManager.java * for accessing data on the server * * @author: Gao_chun * @since: Jul 23, 20 * @version: 1.0.0 * * @changeLogs: * 1.0.0:first created this class. * ******************************************************************************/package Org.gaochun.android.http.manager;import Java.io.file;import Org.apache.http.header;import Org.gaochun.android.http.asynchttpclient;import Org.gaochun.android.http.requestparams;import Org.gaochun.android.http.network.irequestcallback;import org.gaochun.android.http.network.RequestCallBack; Import Org.gaochun.model.result;import Org.gaochun.parser.abstractparser;import Org.gaochun.utils.log;import Android.content.context;import android.os.handler;import android.os.looper;/** * @author Gao_chun * General Data communication class, Data that does not involve authentication and Authorization. * task of this class: gets the data object by the corresponding Parameter. * This class does not involve URL Addresses. */public class Genericdatamanager { private static final String TAG = GenericDataManager.class.getSimpleName (); private static Genericdatamanager sinstance; Private final String mserverhost;//server address prefix private final Handler mhandler;//perform asynchronous callback Handler private static ASYNCHTTPC Lient client;//asynchttpclient object//set Timeout Time static{client = new Asynchttpclient (); Initializes the Asynchttpclient object client.settimeout (6 * 1000); Set time-out (important)}//singleton public synchronized static Genericdatamanager getinstance () {if (sinstance = = Null) { LOG.E (TAG, "configmanager.initiate Method not called in the application."); }//else Ignored. Return sinstance; }//need to initialize public static void Initialize (Context applicationcontext, String serverhost) in Application {sinstan CE = new Genericdatamanager (applicationcontext, serverhost); } private Genericdatamanager (Context applicationcontext, String serverhost) {//initialize handler for execution of task m in the main thread Handler = newHandler (looper.getmainlooper ()); Initialize server address Mserverhost = serverhost; }/** * This method encapsulates the network data request and data resolution * and passes in the callback interface * @param requestid Request ID * @param requesttype request type (here, based on the constants passed in Get request and Post Request) * @param urlstring request URL * @param mparams request parameter * @param parser general Data parsing abstract parser * @param Mcallback Custom Interface callback */private Requestcallback Mrequestcallback;//the abstract class inherits Asynchttpresponsehandler and overrides the callback method public <T> void datarequest (final int requestid,string requesttype,string urlstring,requestparams mparams, Final abstractparser<t> mparser,final irequestcallback mcallback) {log.i (TAG, "url:--->" +mserverh OST + File.separator + urlstring); The callback if the request data starts before the IF (mcallback! = Null) {mhandler.post (new Runnable () {@Override public void run () {mcallback.onrequeststart (requestid); } }); }//else ignored Instantiate callback Object mrequestcallback = new Requestcallback () {@Override public void onsuccess ( int statusCode, header[] headers, byte[] responsebody) {string data = new String (responsebody);//get Data results LOG.D (TAG, "server Fetch data:" +data); Final result<t> Result = Mparser.parse (data);//parse class If (Result! = Null) {//return The RequestID + statusCode + result mcallback.onrequestsuccess (requestid,statuscode,result);//return request succeeds and resolves The completed data Callback}//else Ignored. } @Override public void OnStart () {if (mcallback! = Null) {mCall Back.onrequeststart (requestid); }//else ignored} @Override public void onfailure (int statusCode, header[] headers, byte[] responsebody, throwable error) {if (mcallback! = null) { Mcallback.onrequesterror (requestid,error); }//else ignored}}; Switch the specific request method according to the incoming RequestType (note: JDK1.7 in switch () supports string constants) switch (requesttype) {case constants.reque St. GET:client.get (mserverhost + file.separator + urlstring, mparams,mrequestcallback); Break Case Constants.REQUEST.POST:client.post (mserverhost + file.separator + urlstring, Mparams,mrequestcallback ); Break Default:client.get (mserverhost + file.separator + urlstring, mparams,mrequestcallback); Break } }}</pre> What we need to note is the parameters passed in the method, and the generic <T> is Used:<pre name="code" class="java"><pre name="code" class="java">/** * This method encapsulates the network data request and data resolution * and passes in the callback interface * @param requestid Request ID * @param the RequestType request type (where only the get is provided based on the constants passed In) Request and Post Request) * @param urlstring request URL * @param mparams request parameter * @param parser general Data Parsing abstract parser * @ param Mcallback Custom interface callback */public <T> void datarequest (final int requestid,string requesttype,string Urlstrin G,requestparams mparams, final abstractparser<t> mparser,final irequestcallback Mcallback)</pre></pre> The request parameter, request type, Request url, parser, callback, Pass in this method to handle, callback succeeds directly fetch data if the project needs to use the Avatar upload, download and other functions,android-async-httpthe corresponding method has been provided in the project, and you can encapsulate the method yourself in the class. squeeze time to tidy up this article, the purpose is to give you a simple introduction to the use of the framework, so that interested friends have some understanding, the next blog will give you detailed Introduction datarequest abstract parsing class and request parameter encapsulation in the requestparameterfactory class, and of course it needs to be sorted Out. Source Code after the sharing of learning for EVERYONE. Thank you for your attention, if you feel there is a need to improve the place or good ideas, we welcome your Comments. <blockquote style="margin:0 0 0 40px; border:none; padding:0px"> <blockquote style="margin:0 0 0 40px; border:none; padding:0px"> @remark: This series of blog is forbidden to reprint </blockquote> </blockquote> Home Car Wash app---android Client Development Network Framework encapsulation Introduction (i)

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