我是新android开发。我有一个网站已经建立的，它使用的MySQL数据库。我想知道我怎么能我的应用程序连接到数据库。

我想实现的是我的应用程序应该要求找到一个定义的ID或名称的表。表中包含链接图像或图像名称。我想该应用检索这些图像，并在Android应用程序中显示。

哪些方法可以做到这一点？ 我可以用PHP来开发Android应用程序？

如果有哪位朋友能帮助我，建议我的方式或给我的教程适合的链接，可以帮助，我会很感激！

干杯

在你的清单文件将网​​络的权限：

 ＆LT;使用-权限的Andr​​oid：名称=android.permission.INTERNET对/＆GT;
 

请一类，使一个HTTP请求到服务器。例如（我使用JSON解析得到的值）：

 公共类JSONfunctions {
  公共静态的JSONObject getJSONfromURL（字符串URL）{
    InputStream的是= NULL;
    字符串结果=;
    JSONObject的jArray = NULL;

    //从网址下载JSON数据
    尝试 {
        HttpClient的HttpClient的=新DefaultHttpClient（）;
        HttpPost httppost =新HttpPost（URL）;
        HTT presponse响应= httpclient.execute（httppost）;
        HttpEntity实体= response.getEntity（）;
        是= entity.getContent（）;

    }赶上（例外五）{
        Log.e（log_tag，错误的HTTP连接+ e.toString（））;
    }

    //转换响应串
    尝试 {
        的BufferedReader读卡器=新的BufferedReader（新的InputStreamReader（
                是，ISO-8859-1），8）;
        StringBuilder的SB =新的StringBuilder（）;
        串线= NULL;
        而（（行= reader.readLine（））！= NULL）{
            sb.append（行+\ N）;
        }
        is.close（）;
        结果= sb.toString（）;
    }赶上（例外五）{
        Log.e（log_tag，错误转换结果+ e.toString（））;
    }

    尝试 {
        jArray =新的JSONObject的（结果）;
    }赶上（JSONException E）{
        Log.e（log_tag，错误分析数据+ e.toString（））;
    }

    返回jArray;
  }
}
 

在你的 MainActivity ，使对象的类 JsonFunctions ，并通过从您的网址想要得到的数据作为参数。例如：

 的JSONObject的JSONObject;
的JSONObject = JSONfunctions.getJSONfromURL（HTTP：// YOUR_DATABASE_URL）;
 

然后终于看完了JSON标签和存储在一个ArrayList中的值。后来，他们展示的，如果你想一个ListView。

I am new to android development. I have a website already setup which uses mysql database. I want to know how can i connect my app to that database.

What i wanna achieve is that my app should make a request to find a table of a defined "ID" or name. The table contains links to images or image names. I want the app to retrieve those images and display them on the android app.

What are the ways this can be done? Can i use pHp to develop an android app?

If anyone can also help me by suggesting me a way or giving me suitable links of tutorials that can help, I'll be thankful!

Cheers

Set the INTERNET permission in your manifest file:

<uses-permission android:name="android.permission.INTERNET" />

Make a class to make an HTTP request to the server. For example (I am using JSON parsing to get the values):

public class JSONfunctions {
  public static JSONObject getJSONfromURL(String url) {
    InputStream is = null;
    String result = "";
    JSONObject jArray = null;

    // Download JSON data from URL
    try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();

    } catch (Exception e) {
        Log.e("log_tag", "Error in http connection " + e.toString());
    }

    // Convert response to string
    try {
        BufferedReader reader = new BufferedReader(new InputStreamReader(
                is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        result = sb.toString();
    } catch (Exception e) {
        Log.e("log_tag", "Error converting result " + e.toString());
    }

    try {
        jArray = new JSONObject(result);
    } catch (JSONException e) {
        Log.e("log_tag", "Error parsing data " + e.toString());
    }

    return jArray;
  }
}

In your MainActivity, make an object with the class JsonFunctions and pass the URL from where you want to get the data as an argument. For example:

JSONObject jsonobject;
jsonobject = JSONfunctions.getJSONfromURL("http://YOUR_DATABASE_URL");

And then finally read the JSON tags and store the values in an ArrayList. Later, show them in a ListView if you want.