Question

我是Android和webservices的新手。我从未使用过post webservice。尝试如下，但它既没有成功也没有失败。

如果我使用高级休息客户端chrome扩展程序，我可以测试并且webservice工作正常，只需花费很多时间。

当尝试从代码运行时，它会立即显示 - 在调用webservices之后 - toast msg - ＆gt;表示它没有调用Web服务。

花了2天但没有运气。有什么建议？

 public void borrowBook(String barCode, String patronId)
    {
        final int DEFAULT_TIMEOUT = 200000 * 1000000000;

        // Make RESTful webservice call using AsyncHttpClient object
        AsyncHttpClient client = new AsyncHttpClient();
        client.setTimeout(DEFAULT_TIMEOUT);

        progress.setMessage("Please Wait...");
        progress.setIndeterminate(false);
        progress.setCancelable(false);
        progress.show();

        RequestParams params = new RequestParams();

        Toast.makeText(getActivity().getApplicationContext(), "B4 calling webservice", Toast.LENGTH_LONG).show();

        client.post("http://43.555.6.111:8081/SIPServices/SIc.svc/Checkout?barcode=B12&patron=thi", new TextHttpResponseHandler() {
                    @Override
                    public void onSuccess(int i, Header[] headers, String response) {
                        Toast.makeText(getActivity().getApplicationContext(), "Response: " + response, Toast.LENGTH_LONG).show();
                        Log.d("TAG", "Success");
                    }

                    @Override
                    public void onFailure(int statusCode, Header[] headers, String response, Throwable error) {
                        Toast.makeText(getActivity().getApplicationContext(), "Status code :" + statusCode + "errmsg : " + error.getMessage(), Toast.LENGTH_LONG).show();
                        Toast.makeText(getActivity().getApplicationContext(), "Unexpected Error occcured! [Most common Error: Device might not be connected to Internet or remote server is not up and running]", Toast.LENGTH_LONG).show();
                        Log.d("TAG", "Failure");
                    }

                }
        );
        progress.dismiss();
        Toast.makeText(getActivity().getApplicationContext(), "After calling webservice", Toast.LENGTH_LONG).show();
    }

Answer 1

您不会将参数设置为任何内容，也不会发送它们。另外，您尝试拨打电话，但网址包含获取参数：＆＃34; http://43.555.6.111:8081/SIPServices/SIc.svc/Checkout?barcode=B12&patron=thi＆＃34;

还要考虑实现onStart方法并记录它，看它是否开始。

Answer 2

这是我处理请求的自定义类。我在这里使用json，你可以返回并输入你想要的。你需要的只是

url：http://43.555.6.111:8081/SIPServices/SIc.svc/Checkout
方法：“POST”

params：键和值的数组列表：条形码= B12＆amp; patron = thi

HashMap<String, String> mValueParams = new HashMap<>();
mValueParams.put("barcode", "B12");
mValueParams.put("patron", "thi");

JSONObject json = jsonParser.makeHttpRequest(url, "POST",mValueParams);

public JSONObject makeHttpRequest（String url，String method， HashMap params）{

    sbParams = new StringBuilder();
    int i = 0;
    for (String key : params.keySet()) {
        try {
            if (i != 0) {
                sbParams.append("&");
            }
            sbParams.append(key).append("=")
                    .append(URLEncoder.encode(params.get(key), charset));

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        i++;
    }

    if (method.equals("POST")) {
        // request method is POST
        try {
            urlObj = new URL(url);

            conn = (HttpURLConnection) urlObj.openConnection();

            conn.setDoOutput(true);

            conn.setRequestMethod("POST");

            conn.setRequestProperty("Accept-Charset", charset);

            conn.setReadTimeout(10000);
            conn.setConnectTimeout(15000);

            conn.connect();

            paramsString = sbParams.toString();

            wr = new DataOutputStream(conn.getOutputStream());
            wr.writeBytes(paramsString);
            wr.flush();
            wr.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    } else if (method.equals("GET")) {
        // request method is GET

        if (sbParams.length() != 0) {
            url += "?" + sbParams.toString();
        }

        try {
            urlObj = new URL(url);

            conn = (HttpURLConnection) urlObj.openConnection();

            conn.setDoOutput(false);

            conn.setRequestMethod("GET");

            conn.setRequestProperty("Accept-Charset", charset);

            conn.setConnectTimeout(15000);

            conn.connect();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    try {
        //Receive the response from the server
        int status = conn.getResponseCode();
        InputStream in = new BufferedInputStream(conn.getInputStream());
        BufferedReader reader = new BufferedReader(new InputStreamReader(in, "iso-8859-1"), 8);
        result = new StringBuilder();
        String line;
        while ((line = reader.readLine()) != null) {
            result.append(line);
        }

    } catch (IOException e) {
        e.printStackTrace();
    }

    conn.disconnect();

    // try parse the string to a JSON object
    try {
        jObj = new JSONObject(result.toString());
    } catch (Exception e) {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }

    // return JSON Object
    return jObj;
}

发布webservice无法在Android中运行

2 个答案: