HTTP 响应 - Android

Question

我正在尝试让我的应用程序向我的网络服务器（位于 IP 10.0.2.2）发布一些内容并接收响应。我正在使用 HttpHelper 对象来执行所有服务器交互方法。目前我的响应变量没有得到任何回报。通过调试知道循环：

while ((line = rd.readLine()) != null) {

从未输入，但它应该输入，因为它应该肯定会收到“OK”行？

非常感谢您的帮助！

网页代码只是：

header("HTTP/1.1 200 OK");

java代码为：

        List<NameValuePair> data = new ArrayList<NameValuePair>();
        HttpHelper httpHelper = new HttpHelper("http://10.0.2.2/", data);
        StringBuilder response = httpHelper.postData();

...

public class HttpHelper {
final HttpClient client;
final HttpPost post;
final List<NameValuePair> data;

public HttpHelper(String address, List<NameValuePair> data) {
    client = new DefaultHttpClient();
    post = new HttpPost(address);
    this.data = data;
}

private class GetResponseTask extends AsyncTask<Void, Void, StringBuilder> {
    protected StringBuilder doInBackground(Void... arg0) {
        try {
            HttpResponse response = client.execute(post);
            return inputStreamToString(response.getEntity().getContent());
        } catch (ClientProtocolException e) {
            Log.e("debug", e.getLocalizedMessage());
        } catch (IOException e) {
            Log.e("debug", e.getLocalizedMessage());
        }
        return null;
    }
}

public StringBuilder postData() {
    try {
        post.setEntity(new UrlEncodedFormEntity(data));
        return (new GetResponseTask().execute()).get();
    } catch (UnsupportedEncodingException e) {
        Log.e("debug", e.getLocalizedMessage());
    } catch (InterruptedException e) {
        Log.e("debug", e.getLocalizedMessage());
    } catch (ExecutionException e) {
        Log.e("debug", e.getLocalizedMessage());
    }
    return null;
}

private StringBuilder inputStreamToString(InputStream is)
        throws IOException {
    String line = "";
    StringBuilder total = new StringBuilder();

    // Wrap a BufferedReader around the InputStream
    BufferedReader rd = new BufferedReader(new InputStreamReader(is));

    // Read response until the end
    while ((line = rd.readLine()) != null) {
        Log.v("debug", "top of readlineloop");
        total.append(line);
        Log.v("debug-readline", line);
    }
    // Return full string
    return total;
}
}

Answer 1

响应实体，即 getEntity() 返回的实体，不包括响应标头，看起来这就是您感兴趣的内容。要检索状态代码，请使用：

response.getStatusLine().getStatusCode()

“实体”是响应内容。

编辑：要从 PHP 发出内容，请使用 echo、print_r()、var_dump()、许多其他函数，以及 - 最重要的是 - 所有在 <?php...?> 标记之外的文本。