向服务器发送 GPS 数据不起作用？

Question

我正在尝试将 GPS 数据从 Android 手机发送到服务器。但它不起作用。我在这里附上了我的代码片段。请检查并帮助我解决这个问题！

public void onNmeaReceived(long timestamp, String nmea) 
    { 
        String url = "http://www.xyz.com/server.php?DATA=";
        String params = URLEncoder.encode(nmea);
        url = url+params;
        HttpClient client = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        try {
            HttpResponse httpResponse = client.execute(httppost);
            Log.d("Status", "Request Sent " + httpResponse.getStatusLine().getStatusCode());
            } 
        catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            } 
            Log.d("url", url);          
    }

我的输出是这样的！它被编码并发送。

08-03 22:37:01.062: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGSV%2C4%2C1%2C16%2C03%2C14%2C147%2C%2C06%2C05%2C140%2C%2C09%2C05%2C018%2C%2C11%2C73%2C251%2C*7E%0D%0A
08-03 22:37:01.172: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGSV%2C4%2C2%2C16%2C14%2C29%2C085%2C%2C17%2C%2C%2C%2C18%2C%2C%2C%2C19%2C48%2C147%2C*72%0D%0A
08-03 22:37:01.312: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGSV%2C4%2C3%2C16%2C20%2C14%2C213%2C%2C22%2C29%2C056%2C%2C24%2C57%2C260%2C%2C27%2C07%2C001%2C*75%0D%0A
08-03 22:37:01.432: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGSV%2C4%2C4%2C16%2C28%2C32%2C298%2C%2C32%2C36%2C194%2C%2C08%2C%2C%2C%2C31%2C%2C%2C*74%0D%0A
08-03 22:37:01.582: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGGA%2C%2C%2C%2C%2C%2C0%2C%2C%2C%2C%2C%2C%2C%2C*66%0D%0A
08-03 22:37:01.702: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPVTG%2C%2CT%2C%2CM%2C%2CN%2C%2CK%2CN*2C%0D%0A
08-03 22:37:01.848: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPRMC%2C%2CV%2C%2C%2C%2C%2C%2C%2C%2C%2C%2CN*53%0D%0A
08-03 22:37:01.962: DEBUG/url(15874): http://www.xyz.com/server.php?DATA=%24GPGSA%2CA%2C1%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C*1E%0D%0A

发送到服务器的数据是，

http://www.xyz.com/server.php?DATA=%24GPGSA%2CA%2C1%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C%2C*1E%0D%0A

数据发送到服务器。 new1.nmea 文件已创建！但是当我输入“cat”查看里面的内容时，文件是空的！

server.php

<?php 
//$data = $_POST["DATA"].""; 
$data = file_get_contents('php://input');
$Handle = fopen("/xxx/xxx/new1.nmea", "a");
fwrite($Handle, $data);
fclose($Handle);
?>

我需要在服务器端使用相同格式的数据而不进行任何更改（nmea 0183 格式）。我震惊了！请帮我解决这个问题！

Answer 1

为什么同时需要 NMEA 和 LocationUpdates，两者都可以。
当您说需要 GPS 信息时，您需要 NMEA 字符串还是仅需要精度、时间、速度等位置属性？

当您尝试发送 NMEA 字符串时，您应该在 NMEAListener 中执行 HTTP 请求，而不是在 LocationListener 中执行？我很好奇，这首先是什么逻辑。

Answer 2

它的工作人员！

public void onNmeaReceived(long timestamp, String nmea) 
        { 
            String params;
            try {
                params = URLEncoder.encode(nmea, "UTF-8");
                Log.d("executing", params);
                String url = "http://www.xyz.com/server.php?DATA="+params;
                //url = url+params;
                HttpPost httppost = new HttpPost(url);
                HttpClient client = new DefaultHttpClient();
                try {
                    HttpResponse httpResponse = client.execute(httppost);
                    Log.d("Status", "Request Sent " + httpResponse.getStatusLine().getStatusCode());
                    } 
                catch (Exception e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                    } 
            } catch (UnsupportedEncodingException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }

<?php 
$data = $_GET["DATA"]."";
echo urldecode($data);
//$data = file_get_contents('php://input');
$Handle = fopen("xxx/xxx/test.nmea", "a");
fwrite($Handle, $data);
fclose($Handle);
flush($Handle);
?>

Answer 3

如果必须使用 HTTP 来接受数据，则应考虑使用“POST”而不是“GET”。 NMEA 中有很多字符，需要对其进行正确的 url 编码才能使请求通过。如果执行“POST”，您可以指定“内容类型”和“字符集”以匹配原始 NMEA。我相信您可以只执行“Content-Type: text/plain”并传递原始 POST。

请注意，如果您使用原始的“POST”方法，则 PHP 中将不再有 $_POST 变量，并且您必须读取原始消息。您可以通过执行以下操作来阅读原始帖子：

$data = file_get_contents('php://input');

客户端代码：

String url = "http://www.xyz.com/server.php";
HttpPost post = new HttpPost(url);

StringEntity se = new StringEntity(nmea);
se.setContentType("text/plain");
post.setEntity(se); 

HttpClient client = new DefaultHttpClient();
HttpResponse httpResponse = client.execute(post);

请注意，您的 POST 将作为原始帖子出现在 PHP 脚本中，因此您必须进行一些处理才能获取 NMEA 字符串。