Question

我正在使用来自使用HttpClient，HttpParams，HttpPost，HttpResponse和HttpEntity的YouTube教程中的外部数据库开发登录和注册。但是，这些函数已被弃用。请使用HttpUrlConnection帮助修改以下代码。

public class ServerRequests {

    ProgressDialog progressDialog;
    public static final int CONNECTION_TIMEOUT = 1000 * 15;
    public static final String SERVER_ADDRESS = "http://classpark.16mb.com/";

    public ServerRequests(Context context){
        progressDialog = new ProgressDialog(context);
        progressDialog.setCancelable(false);
        progressDialog.setTitle("Processing");
        progressDialog.setMessage("Please wait...");

    }
    public void storeUserDataInBackground(User user, GetUserCallback userCallback){
        progressDialog.show();
        new StoreUserDataAsyncTask(user, userCallback).execute();
    }
    public void fetchUserDataInBackground(User user, GetUserCallback callback){
        progressDialog.show();
        new fetchUserDataAsyncTask(user,callback).execute();

    }
    public class StoreUserDataAsyncTask extends AsyncTask<Void,Void,Void> {
        User user;
        GetUserCallback userCallback;
        public StoreUserDataAsyncTask(User user, GetUserCallback userCallback){
            this.user = user;
            this.userCallback = userCallback;
        }

        @Override
        protected Void doInBackground(Void... Params){
            ArrayList<NameValuePair> dataToSend = new  ArrayList<>();
            dataToSend.add(new BasicNameValuePair("name", user.name));
            dataToSend.add(new BasicNameValuePair("email", user.email));
            dataToSend.add(new BasicNameValuePair("username", user.username));
            dataToSend.add(new BasicNameValuePair("password", user.password));

            HttpParams httpRequestParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpRequestParams, CONNECTION_TIMEOUT);
            HttpConnectionParams.setSoTimeout(httpRequestParams, CONNECTION_TIMEOUT);

            HttpClient client = new DefaultHttpClient(httpRequestParams);
            HttpPost post = new HttpPost(SERVER_ADDRESS + "Register.php");

            try {
                post.setEntity(new UrlEncodedFormEntity(dataToSend));
                client.execute(post);
            }catch (Exception e){
                e.printStackTrace();
            }

            return null;
        }
        @Override
        protected void onPostExecute(Void aVoid){
            progressDialog.dismiss();
            userCallback.done(null);
            super.onPostExecute(aVoid);
        }
    }
    public class fetchUserDataAsyncTask extends AsyncTask<Void,Void,User> {
        User user;
        GetUserCallback userCallback;

        public fetchUserDataAsyncTask(User user, GetUserCallback userCallback){
            this.user = user;
            this.userCallback = userCallback;
        }
        @Override
        protected User doInBackground(Void... params){
            ArrayList<NameValuePair> dataToSend = new  ArrayList<>();
            dataToSend.add(new BasicNameValuePair("username", user.username));
            dataToSend.add(new BasicNameValuePair("password", user.password));

            HttpParams httpRequestParams = new BasicHttpParams();
            HttpConnectionParams.setConnectionTimeout(httpRequestParams, CONNECTION_TIMEOUT);
            HttpConnectionParams.setSoTimeout(httpRequestParams, CONNECTION_TIMEOUT);

            HttpClient client = new DefaultHttpClient(httpRequestParams);
            HttpPost post = new HttpPost(SERVER_ADDRESS + "FetchUserData.php");

            User returnedUser = null;

            try {
                post.setEntity(new UrlEncodedFormEntity(dataToSend));
                HttpResponse httpResponse = client.execute(post);

                HttpEntity entity = httpResponse.getEntity();
                String result = EntityUtils.toString(entity);
                JSONObject j0bject = new JSONObject(result);

                if (j0bject.length() == 0){
                    returnedUser = null;
                }else {
                    String name = j0bject.getString("name");
                    String email = j0bject.getString("email");


                    returnedUser = new User(name, email,user.username, user.password);

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

            return returnedUser;
        }
        @Override
        protected void onPostExecute(User returnedUser){
            progressDialog.dismiss();
            userCallback.done(returnedUser);
            super.onPostExecute(returnedUser);
        }
    }
}

Answer 1

根据http://developer.android.com/reference/android/net/http/AndroidHttpClient.html

此类在API级别22中已弃用。请使用 URLConnection 和朋友代替。 Apache HTTP客户端不再维护，可能会在将来的版本中删除。

无论如何，如果你看一下源代码，我相信你会找到一个推荐新选项而不是弃用选项的注释。祝你好运！

如何在下面的代码中使用HttpUrlConnection和openConnection（）

1 个答案: