Android中用于内容类型的JSON对象的HTTP POST请求问题

Question

以下是我针对运行Android 4.1.2的Android设备中的HTTP POST请求的代码。 我有问题：

• 该代码在Samsung设备上完美运行，而在HTC设备上给出“ Content-type not application / json”。

  公共静态字符串POST（String url，JSONObject obj）{Log.i（“ JSONPOSTBEGIN”，“ JSON POST的开始”）; InputStream inputStream = null; 字符串结果=“”;

   HttpClient httpclient = new DefaultHttpClient(); try { HttpPost post = new HttpPost(url); post.setHeader("Content-type", "application/json"); post.setHeader("Accept", "application/json"); StringEntity se = new StringEntity(obj.toString()); se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json")); post.setEntity(se); HttpResponse httpResponse = mHhttpclient.execute(post); // receive response as inputStream inputStream = httpResponse.getEntity().getContent(); // convert inputstream to string if(inputStream != null) { result = convertInputStreamToString(inputStream); } else result = "Did not work!"; } catch (Exception e) { Log.d("InputStream", e.getLocalizedMessage()); } Log.i("JSONPOSTEND", "End of JSON data post methos..."); return result; 

  }

Answer 1

为了使其能够在HTC和所有设备上运行，您必须执行此操作

private static HttpEntity getHttpEntity(String stringEntity) {
    HttpEntity entity = null;
    try {
        entity = new StringEntity(stringEntity, HTTP.UTF_8);
        ((StringEntity) entity).setContentType("application/json;charset=UTF-8");
        ((StringEntity) entity).setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, "application/json;charset=UTF-8"));

    } catch (Exception e) {
        Log.d("error creating entity: " + stringEntity);
    }
    return entity;
}

Answer 2

请注意，标题可能是由此设置的

新的HttpPost（url）;

在添加新的标题（如“ content-type”）之前，您可能必须先调用remove header（Content-type）。

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并在测试环境中记录WIRE＆HEADER