Android中用於內容類型的JSON對象的HTTP POST請求問題

Question

以下是我針對運行Android 4.1.2的Android設備中的HTTP POST請求的代碼。 我有問題：

• 該代碼在Samsung設備上完美運行，而在HTC設備上給出“ Content-type not application / json”。

  公共靜態字符串POST（String url，JSONObject obj）{Log.i（“ JSONPOSTBEGIN”，“ JSON POST的開始”）; InputStream inputStream = null; 字符串結果=“”;

   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

為了使其能夠在HTC和所有設備上運行，您必須執行此操作

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

請注意，標題可能是由此設置的

新的HttpPost（url）;

在添加新的標題（如“ content-type”）之前，您可能必須先調用remove header（Content-type）。

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