Android JSON到PHP Server并返回

Question

任何人都能提供上述解决方案吗？

现在,我想做的就是向我的服务器发送一个JSON请求(例如:{picture:jpg,color:green}),让PHP访问数据库,然后从服务器的数据库返回一个文件名(然后获取android下载文件 - 不是问题)

任何人都可以首先建议一个Android框架来帮助我解决这个问题. - 将JSON POST到我服务器上的php文件

其次是一个PHP脚本,将JSON转换为php可读格式(访问数据库也不是问题,但我无法将JSON转换为对象,然后与数据库匹配)

谢谢

编辑

感谢下面的链接,但我不是因为懒惰而问这个,因为我似乎无法发送JSON字符串并得出正确的答案而烦恼.

那么让我展示一些代码并找出为什么我认为应该发生的事情没有发生:

获取URL(使用GET,这样我可以显示工作)

http://example.com/process/json.php?service=GOOGLE

<?php

// decode JSON string to PHP object
$decoded = json_decode($_GET['json']);

// I'm not sure of which of the below should work but i've tried both.
$myService = $decoded->service; //$service should equal: GOOGLE
$myService = $decoded->{'service'}; //$service should equal: GOOGLE

// but the result is always $myService = null - why?


?>

Answer 1

好的,我有PHP.下面检索POST ed数据并返回服务

<?php

$data = file_get_contents('php://input');
$json = json_decode($data);
$service = $json->{'service'};

print $service;

?>

和Android代码:

在onCreate()

path = "http://example.com/process/json.php";

    HttpClient client = new DefaultHttpClient();
    HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); // Timeout
                                                                            // Limit
    HttpResponse response;
    JSONObject json = new JSONObject();
    try {
        HttpPost post = new HttpPost(path);
        json.put("service", "GOOGLE");
        Log.i("jason Object", json.toString());
        post.setHeader("json", json.toString());
        StringEntity se = new StringEntity(json.toString());
        se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE,
                "application/json"));
        post.setEntity(se);
        response = client.execute(post);
        /* Checking response */
        if (response != null) {
            InputStream in = response.getEntity().getContent(); // Get the
                                                                // data in
                                                                    // the
                                                                    // entity
            String a = convertStreamToString(in);
            Log.i("Read from Server", a);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

以及你想要的地方

private static String convertStreamToString(InputStream is) {

    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    StringBuilder sb = new StringBuilder();

    String line = null;
    try {
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        try {
            is.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return sb.toString();
}