Android HttpURLConnection getResponseCode（）400-為什么？

Question

我曾在以下項目中使用以下代碼向服務器發送數據，它可以工作，但在我最近的項目中卻無法工作，並給我statuscode 400 ...我在AsyncTask類中使用以下代碼：

public class sendingDataAsyncHttpTask extends AsyncTask<String, Void, Integer> {

    @Override
    protected void onPreExecute() {

    }

    @Override
    protected Integer doInBackground(String... params) {

        InputStream inputStream = null;
        Integer result = 0;
        HttpURLConnection urlConnection = null;
        String key = params[0];
        try {
            URL url = new URL(params[0]);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestMethod("GET");
            int statusCode = urlConnection.getResponseCode();
            if (statusCode == 200) {
                BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
                StringBuilder response = new StringBuilder();
                String line;
                while ((line = r.readLine()) != null) {
                    response.append(line);
                }
                parseAdminTaskResult(response.toString());
                result = 1;
            } else {
                result = 0;
            }

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

        return result;
    }

    @Override
    protected void onPostExecute(Integer result) {
}

Answer 1

上面的代碼可以正常工作，但是問題出在我嘗試發送的數據中……請始終確保您的數據中沒有空格（“”），然后將其發送到服務器...