無法將Wamp MySQL數據庫連接到Android Studio

Question

我嘗試了許多不同的IP地址以及使用127.0.0.0和我自己的計算機IP地址，但是當我運行程序並嘗試注冊它時，它與服務器聯系，然后突然停止，並說應用程序名稱已停止工作。 由於您在此問題上停留了三天，請您能幫我還是幫上忙。

我在wamp / www /文件夾中創建了一個名為bradvisor_login_api的文件夾，該文件夾包含三個文件，其中一個文件用於config.php文件，下面列出了該文件。 phpMyAdmin帳戶沒有密碼，僅具有root用戶名。

任何人都可以幫助我解決此問題，我已經將config.php文件和一些Java文件粘貼到了顯示連接的位置。

Config.PHP文件

<?php

/**
 * Database config variables
 */
define("DB_HOST", "127.0.0.1");
define("DB_USER", "root");
define("DB_PASSWORD", "root");
define("DB_DATABASE", "bradvisor_login_api");
?>

Java連接文件

//URL of the PHP API


   private static String loginURL = "http://192.168.0.8:80/bradvisor_login_api/";
    private static String registerURL = "http://192.168.0.8:80/bradvisor_login_api/";
    private static String forpassURL = "http://192.168.0.8:80/bradvisor_login_api/";
    private static String chgpassURL = "http://192.168.0.8:80/bradvisor_login_api/";

httpd.conf文件

# Listen: Allows you to bind Apache to specific IP addresses and/or
# ports, instead of the default. See also the <VirtualHost>
# directive.
#
# Change this to Listen on specific IP addresses as shown below to 
# prevent Apache from glomming onto all bound IP addresses.
#
#Listen 12.34.56.78:80
Listen 0.0.0.0:80
Listen [::0]:80

錯誤日志

  07-02 20:02:42.163    2269-2526/com.brad.visor E/Buffer Error﹕ Error converting result java.lang.NullPointerException: lock == null
07-02 20:02:42.163    2269-2526/com.brad.visor E/JSON Parser﹕ Error parsing data org.json.JSONException: End of input at character 0 of
07-02 20:02:42.194    2269-2269/com.brad.visor E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.brad.visor, PID: 2269
    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.getString(java.lang.String)' on a null object reference
            at com.brad.visor.Register$ProcessRegister.onPostExecute(Register.java:232)
            at com.brad.visor.Register$ProcessRegister.onPostExecute(Register.java:189)
            at android.os.AsyncTask.finish(AsyncTask.java:636)
            at android.os.AsyncTask.access$500(AsyncTask.java:177)
            at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:653)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5257)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Register.java文件：

private class ProcessRegister extends AsyncTask<String, String, JSONObject>
------------------------------------------------------------------------
{

        /**
         * Defining Process dialog
         **/
        private ProgressDialog pDialog;

        String email,password,fname,lname,uname;
        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            inputUsername = (EditText) findViewById(R.id.uname);
            inputPassword = (EditText) findViewById(R.id.pword);
            fname = inputFirstName.getText().toString();
            lname = inputLastName.getText().toString();
            email = inputEmail.getText().toString();
            uname= inputUsername.getText().toString();
            password = inputPassword.getText().toString();
            pDialog = new ProgressDialog(Register.this);
            pDialog.setTitle("Contacting Servers");
            pDialog.setMessage("Registering ...");
            pDialog.setIndeterminate(false);
            pDialog.setCancelable(true);
            pDialog.show();
        }

        @Override
        protected JSONObject doInBackground(String... args) {

            UserFunctions userFunction = new UserFunctions();
            JSONObject json = userFunction.registerUser(fname, lname, email, uname, password);

            return json;

        }
        @Override
        protected void onPostExecute(JSONObject json) {
            /**
             * Checks for success message.
             **/
            try {

if (json.getString(KEY_SUCCESS) != null) {
------------------------------------------
                    registerErrorMsg.setText("");
                    String res = json.getString(KEY_SUCCESS);

                    String red = json.getString(KEY_ERROR);

                    if(Integer.parseInt(res) == 1){
                        pDialog.setTitle("Getting Data");
                        pDialog.setMessage("Loading Info");

                        registerErrorMsg.setText("Successfully Registered");

                        DatabaseHandler db = new DatabaseHandler(getApplicationContext());
                        JSONObject json_user = json.getJSONObject("user");

                        /**
                         * Removes all the previous data in the SQlite database
                         **/

                        UserFunctions logout = new UserFunctions();
                        logout.logoutUser(getApplicationContext());
                        db.addUser(json_user.getString(KEY_FIRSTNAME),json_user.getString(KEY_LASTNAME),json_user.getString(KEY_EMAIL),json_user.getString(KEY_USERNAME),json_user.getString(KEY_UID),json_user.getString(KEY_CREATED_AT));
                        /**
                         * Stores registered data in SQlite Database
                         * Launch Registered screen
                         **/

                        Intent registered = new Intent(getApplicationContext(), Registered.class);

                        /**
                         * Close all views before launching Registered screen
                         **/
                        registered.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        pDialog.dismiss();
                        startActivity(registered);

                        finish();
                    }

                    else if (Integer.parseInt(red) ==2){
                        pDialog.dismiss();
                        registerErrorMsg.setText("User already exists");
                    }
                    else if (Integer.parseInt(red) ==3){
                        pDialog.dismiss();
                        registerErrorMsg.setText("Invalid Email id");
                    }
                }
                else{
                    pDialog.dismiss();

                    registerErrorMsg.setText("Error occured in registration");
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }}
    public void NetAsync(View view){
        new NetCheck().execute();
    }}

Answer 1

從錯誤日志中：“無法將java.lang.String類型的Value <br轉換為JSONObject”您要的頁面是什么，您可以將其內容發布到問題中。

據我從錯誤日志中得知，該輸入不可解析。 當您收到響應為HTML時似乎是這種情況（其中分行符是<br />指示器，但是在字符串上，它們可以是多個，例如\\ 0。似乎在解析時，內容是作為單個變量讀取，並且無法將整個響應緩沖在該變量中，然后，該失敗的對象變為null，然后對其進行操作（因此失敗，並得到記錄的錯誤）

Answer 2

在Android Studio中，您必須輸入10.0.2.2作為IP。 這是用於localhost連接的ip Android Studio。