适用于Android的REST API客户端库

Question

我们正在构建一个基于位置的消息传递应用程序,它使用Parse.com作为后端(Parse.com类似于Urban Airship/PubNub等),我们现在想切换到我们自己的后端以获得更好的控制.为此,我们构建了一个基于node.js的后端,其功能通过REST API公开

要使用此API,我们需要构建一个Android库(类似于Parse.com的Android SDK),它抽象所有HTTP请求/响应或REST API调用,并为各种操作提供直接函数,如getUsers(),sendMessage()等

在Android中实现REST API客户端的方法:

• 使用IntentService + ResultReceiver
• 服务
• 的AsyncTask
• 使用装载机

现在,考虑到我们想要构建一个android库,并且在用户与应用程序交互时可能会同时进行REST API调用,哪种方法最好继续进行？我也对其他建议/建议持开放态度.

更新:我们首先使用IntentService + ResultReceiver构建我们自己的库,它工作正常.但我们后来偶然发现了Android Async Http.用它.这很棒!

Answer 1

我见过的基于Google IO Pro Tips 2010的最佳实践是RoboSpice库,它基于REST,非常巧妙地与Activity生命周期一起工作,以避免内存泄漏.

图书馆在这里快速信息图

• 加载器是为数据库而不是REST而设计的,它们会在活动重置时重置,这意味着您将丢失数据.
• 异步任务,没有.
• Intent Service + Result接收器基本上是RoboSpice的工作方式,所以如果你正在构建自己的lib,我会采用这种方法!
• 服务也很好,类似于IntentService方法,但在这个实例中IntentService工作得更好.

该Service方法可能更好,看看robospice服务,他们使用ExecutorService其终止Service时,它已用完的Requests合作,通过,这是比Android更具体的Java并发.需要注意的是,服务在处理请求时运行,然后如果没有剩下则终止自身.

使用ExecutorService或任何类型的线程池的优点是,您可以定义一次可以运行的请求数.除非你有一个非常快速的连接2-4是我所建议的最多.

Answer 2

也许这个班可以帮助: -

/*Copyright 2014 Bhavit Singh Sengar
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.*/

package com.infotech.zeus.util;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import android.widget.Toast;

public class RestClient {


        JSONObject data = new JSONObject();
        String url;
        String headerName;
        String headerValue;

        public RestClient(String s){

            url = s;
        }


        public void addHeader(String name, String value){

            headerName = name;
            headerValue = value;

        }

        public void addParam(String key, String value){

            try {
                data.put(key, value);
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


        }

        public String executePost(){  // If you want to use post method to hit server

            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(url);
            httpPost.setHeader(headerName, headerValue);
            HttpResponse response = null;
            String result = null;
            try {
                StringEntity entity = new StringEntity(data.toString(), HTTP.UTF_8);
                httpPost.setEntity(entity);
                response = httpClient.execute(httpPost);
                HttpEntity entity1 = response.getEntity();
                result = EntityUtils.toString(entity1);
                return result;
                //Toast.makeText(MainPage.this, result, Toast.LENGTH_LONG).show();
            } catch (UnsupportedEncodingException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return result;



        }

        public String executeGet(){ //If you want to use get method to hit server

            HttpClient httpClient = new DefaultHttpClient();
            HttpGet httpget = new HttpGet(url);
            String result = null;
            ResponseHandler<String> responseHandler = new BasicResponseHandler();
            try {
                result = httpClient.execute(httpget, responseHandler);
            } catch (ClientProtocolException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            return result;
        }
}

使用此类的简单示例:

RestClient client = new RestClient("http://www.example.com/demo.php");  //Write your url here
        client.addParam("Name", "Bhavit"); //Here I am adding key-value parameters
        client.addParam("Age", "23");

        client.addHeader("content-type", "application/json"); // Here I am specifying that the key-value pairs are sent in the JSON format

        try {
            String response = client.executePost(); // In case your server sends any response back, it will be saved in this response string.

        } catch (Exception e) {
            e.printStackTrace();
        }

Answer 3

我使用了Retrofit,这是一个非常好的库,它提供了一个简单的结构来管理端点和解析数据/集合/对象.

文档足够完整,可以轻松编写代码.

CQFD>去吧