java - 如何将android连接到远程数据库

Question

我正在开发一个必须将数据存储在数据库中的 Android 应用程序。该数据库还必须由 iPhone 应用程序和 Web 应用程序访问。我想为此使用 Mysql，因为它是开源的。

我正在寻找有关此的一些信息，显然我需要创建一个连接到数据库的 Web 服务。可能在php中，但我对php没有任何经验......

如何编写此 Web 服务以及将其存储在哪里？我在哪里创建和存储数据库？...

谁能帮我解决这个问题？

tnx

Answer 1

使用 SQL Server 管理桌面上的数据并在 Visual Studio 上的 .Net 中创建 Web 服务。

然后连接到应用程序中的 Web 服务并从数据库中设置/获取数据。

关于如何在 .NET 中创建 Web 服务的链接（不包括 Android 中的实现）：http ://srikanthtechnologies.com/blog/dotnet/wsdaljava.aspx

关于如何将您的服务与 Android 连接的链接：http: //seesharpgears.blogspot.in/2010/11/basic-ksoap-android-tutorial.html

http://www.codeproject.com/Articles/304302/Calling-Asp-Net-Webservice-ASMX-From-an-Android-Ap

http://adrianandroid.blogspot.in/2012/05/access-c-net-web-service-in.html

Answer 2

我的自定义类将联系本地主机服务器（WAMP 或 XAMP 服务器）

CustomHttpClient.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.ArrayList;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.conn.params.ConnManagerParams;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;

public class CustomHttpClient {
    /** The time it takes for our client to timeout */
    public static final int HTTP_TIMEOUT = 30 * 1000; // milliseconds

    /** Single instance of our HttpClient */
    private static HttpClient mHttpClient;

    /*
     * Get our single instance of our HttpClient object.
     * 
     * @return an HttpClient object with connection parameters set
     */
    private static HttpClient getHttpClient() {
        if (mHttpClient == null) {
            mHttpClient = new DefaultHttpClient();
            final HttpParams params = mHttpClient.getParams();
            HttpConnectionParams.setConnectionTimeout(params, HTTP_TIMEOUT);
            HttpConnectionParams.setSoTimeout(params, HTTP_TIMEOUT);
            ConnManagerParams.setTimeout(params, HTTP_TIMEOUT);

        }
        return mHttpClient;
    }

    /*
     * Performs an HTTP Post request to the specified url with the specified
     * parameters.
     * 
     * @param url The web address to post the request to
     * 
     * @param postParameters The parameters to send via the request
     * 
     * @return The result of the request
     * 
     * @throws Exception
     */ 
    public static String executeHttpPost(String url,
    ArrayList<NameValuePair> postParameters) throws Exception {

        BufferedReader in = null;
        try 
        { 
            HttpClient client = getHttpClient();
            HttpPost request = new HttpPost("http://192.168.1.38/" +url (pathoffilenameyouarecalling));
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(postParameters);
            request.setEntity(formEntity);
            HttpResponse response = client.execute(request);
            in = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));

            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) 
            {
                sb.append(line + NL);
            }

            in.close();

            String result = sb.toString();
            return result;
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * Performs an HTTP GET request to the specified url.
     * 
     * @param url
     *            The web address to post the request to
     * @return The result of the request
     * @throws Exception
     */
    public static String executeHttpGet(String url) throws Exception {
        BufferedReader in = null;
        try {
            HttpClient client = getHttpClient();
            HttpGet request = new HttpGet();
            request.setURI(new URI(url));
            HttpResponse response = client.execute(request);
            in = new BufferedReader(new InputStreamReader(response.getEntity()
                    .getContent()));

            StringBuffer sb = new StringBuffer("");
            String line = "";
            String NL = System.getProperty("line.separator");
            while ((line = in.readLine()) != null) {
                sb.append(line + NL);
            }
            in.close();

            String result = sb.toString();
            return result;
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

调用它的类将以这种方式实现。

ArrayList<NameValuePair> postParameter = new ArrayList<NameValuePair>();
postParameter.add(new BasicNameValuePair("parametertobesent",value));
respons = CustomHttpClient.executeHttpPost("urlofservice",postParameter);

php 文件应该存在于 XAMP 服务器的 htdocs 中