java - 从 URL 检索 JSON 时，Android Bad Request IOException

Question

我正在使用以下代码从 URL 获取 JSON 对象:

public JSONObject makeRequest(String url) throws IOException, JSONException {

    JSONObject response;
    String jsonString;

    HttpClient httpclient = new DefaultHttpClient();

    // create the request
    HttpUriRequest request = new HttpGet(url);
    request.addHeader("Accept-Encoding", "gzip");

    // execute the request
    HttpResponse resp = httpclient.execute(request);
    StatusLine statusLine = resp.getStatusLine();

    // check the request response status. Should be 200 OK
    if (statusLine.getStatusCode() == HttpStatus.SC_OK) {
        Header contentEncoding = resp.getFirstHeader("Content-Encoding");
        InputStream instream = resp.getEntity().getContent();
        // was the returned response gzip'ed?
        if (contentEncoding != null && contentEncoding.getValue().equalsIgnoreCase("gzip")) {
            instream = new GZIPInputStream(instream);
        }

        BufferedReader reader = new BufferedReader(new InputStreamReader(instream));
        StringBuilder responseString = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            responseString.append(line);
        }
        jsonString = responseString.toString();
        response = new JSONObject(jsonString);
    } else {
        resp.getEntity().getContent().close();
        throw new IOException(statusLine.getReasonPhrase());
    }

    return response;
}

但是我在这一行中收到错误消息，指出请求错误:

throw new IOException(statusLine.getReasonPhrase());

并且不返回结果。

我该如何解决这个问题？

谢谢!

Answer 1

请尝试改用此代码。简化了很多。

try {//Making a request to server getting entities
     JSONObject json = new JSONObject(EntityUtils.toString(new DefaultHttpClient().execute(new HttpGet(URL)).getEntity()));
     //getting json root object
     JSONObject obj = json.getJSONObject("ROOT_ELEMENT");
} catch (JSONException e) {
     e.printStackTrace();
} catch (IOException e) {
     e.printStackTrace();
}