android如何利用基于Http 协议的WebService服务来获取远程数据库数据

初学android，这个问题困扰了多天，在搜索引擎及论坛各位高手的帮助下，现在终于给搞定了，在这里分享给大家，希望对大家有所帮助！（其实本来是尝试用SOAP协议的，试了n天，无果，无奈又只能回到http了！）先来看看服务器端吧！

首先新建一个ASP.NET Web服务应用程序，我这里将其命名为ShopService，具体代码如下：

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using BLL.Shop;
using System.Web.Script.Services;

namespace WebService
{
    /// <summary>
    /// ShopService 的摘要说明
    /// </summary>
    [WebService(Namespace = "http://具体的根据你的需要咯/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [ToolboxItem(false)]
    // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
    [System.Web.Script.Services.ScriptService]

    public class ShopService : System.Web.Services.WebService
    {
        [WebMethod]
        //[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public string getShopItems(string userId, int type)
        {
            Shop shop = new Shop();
            return shop.getShopItems(userId, type);
        }
    }
}

然后再来看看android客户端，我就直接上代码了

package com.xxx;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.json.JSONObject;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;

public class WebserviceTookit {
	// private static final String TAG = "ShopItems";
	private static final String WEBSERVICE_IP = "http://10.0.2.2:14294";

	public static String getShopItems(String userId, int type) {
		try {
			// 调用带参数的WebMethod
			final String SERVER_URL = WEBSERVICE_IP
					+ "/ShopService.asmx/getShopItems"; // 带参数的WebMethod
			HttpPost request = new HttpPost(SERVER_URL); // 根据内容来源地址创建一个Http请求
			request.addHeader("Content-Type", "application/json; charset=utf-8");// 必须要添加该Http头才能调用WebMethod时返回JSON数据
			JSONObject jsonParams = new JSONObject();
			jsonParams.put("userId", userId);// 传参
			jsonParams.put("type", type);
			HttpEntity bodyEntity = new StringEntity(jsonParams.toString(),
					"utf8");// 参数必须也得是JSON数据格式的字符串才能传递到服务器端，否则会出现"{'Message':'xxx是无效的JSON基元'}"的错误
			request.setEntity(bodyEntity);

			HttpParams httpParameters = new BasicHttpParams();
			// Set the timeout in milliseconds until a connection is
			// established.
			// The default value is zero, that means the timeout is not used.
			int timeoutConnection = 3 * 1000;
			HttpConnectionParams.setConnectionTimeout(httpParameters,
					timeoutConnection);
			// Set the default socket timeout (SO_TIMEOUT)
			// in milliseconds which is the timeout for waiting for data.
			int timeoutSocket = 5 * 1000;
			HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket);

			DefaultHttpClient httpClient = new DefaultHttpClient(httpParameters);
			HttpResponse httpResponse = httpClient.execute(request); // 发送请求并获取反馈
			// 解析返回的内容
			if (httpResponse.getStatusLine().getStatusCode() == 200) // StatusCode为200表示与服务端连接成功
			{
				StringBuilder builder = new StringBuilder();
				BufferedReader bufferedReader2 = new BufferedReader(
						new InputStreamReader(httpResponse.getEntity()
								.getContent()));
				for (String s = bufferedReader2.readLine(); s != null; s = bufferedReader2.readLine()) {
					builder.append(s);
				}

				String resultString = builder.toString();
				resultString = JSONToolkit.removeEscape(resultString);

				return resultString;
			}
		} catch (Exception e) {
			e.printStackTrace();
			return "";
		}
		return "";
	}
}

运行时记得关闭防火墙或者添加例外端口~

评论

3 楼 whsky 2013-01-07  

楼主才份源码，C#服务端，非常感谢
[e-mail]

2 楼 kylines 2012-12-18  

yzxqml 写道

楼主有试过用SOAP协议传输数据么？现在正在纠结到底是用HTTP还是SOAP。

我当时尝试使用ksoap向webserice来传输数据，遇到了问题没能搞定，后来就换http方式了，用json格式封装传输的数据，效果也不错

1 楼 yzxqml 2012-12-11  

楼主有试过用SOAP协议传输数据么？现在正在纠结到底是用HTTP还是SOAP。