Java 连接到App42API'；s后端用户API-Libgdx&；安卓

我目前正在使用android、libgdx、平铺地图和AppWarp的多人API为android和桌面开发一个2d侧边滚动器。我正在尝试实现App42API的用户系统，从中我可以将他们的api连接到我的游戏，从而实现多人游戏功能。我已经编写了一个注册脚本，应该注册一个用户帐户并将其发送到AppWarp的Cloud DB，但事实并非如此。当我运行游戏时，在将所需文本放入文本字段（用于创建帐户的输入）后，我得到以下错误：

Exception in thread "LWJGL Application" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoClassDefFoundError: org/json/JSONException
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:127)
Caused by: java.lang.NoClassDefFoundError: org/json/JSONException
    at com.mygdx.game.network.Register.registerAccount(Register.java:160)
    at com.mygdx.game.network.Register$1.clicked(Register.java:122)
    at com.badlogic.gdx.scenes.scene2d.utils.ClickListener.touchUp(ClickListener.java:89)
    at com.badlogic.gdx.scenes.scene2d.InputListener.handle(InputListener.java:57)
    at com.badlogic.gdx.scenes.scene2d.Stage.touchUp(Stage.java:348)
    at com.badlogic.gdx.backends.lwjgl.LwjglInput.processEvents(LwjglInput.java:306)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:207)
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:120)
Caused by: java.lang.ClassNotFoundException: org.json.JSONException
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 8 more

我猜它没有正确连接到AppWarp的api，但我不确定如何修复它。下面是我的android launcher类和register类的代码

**我听说您必须通过在程序中调用来初始化app42api sdk**

Android启动器：

package com.mygdx.game.android;

import android.os.Bundle;

import com.badlogic.gdx.backends.android.AndroidApplication;
import com.badlogic.gdx.backends.android.AndroidApplicationConfiguration;
import com.mygdx.game.MainGameLoop;
import com.mygdx.game.network.App42Handler; 
import com.shephertz.app42.gaming.multiplayer.client.WarpClient;
import com.shephertz.app42.paas.sdk.android.App42API;

@SuppressWarnings("unused")
public class AndroidLauncher extends AndroidApplication 
{


    @Override
    protected void onCreate (Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
        // initialize multiplayer api taking in my api key and secret key
        App42API.initialize(App42API.appContext, App42Handler.apiKey, App42Handler.secretKey); 
        initialize(new MainGameLoop(), config);
    }
}

Register.java：

package com.mygdx.game.network;

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.TextInputListener;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.TextureAtlas;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
import com.badlogic.gdx.scenes.scene2d.ui.TextField;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton.TextButtonStyle;
import com.badlogic.gdx.scenes.scene2d.ui.TextField.TextFieldStyle;
import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.shephertz.app42.gaming.multiplayer.client.WarpClient;
import com.shephertz.app42.paas.sdk.android.App42API;
import com.shephertz.app42.paas.sdk.android.App42CallBack;
import com.shephertz.app42.paas.sdk.android.user.User;
import com.shephertz.app42.paas.sdk.android.user.UserService;

public class Register implements Screen, TextInputListener
{

    private TextField usernameTxtField, passwordTxtField, confirmpassTxtField, emailTxtField;
    private TextFieldStyle txtFieldStyle;
    private BitmapFont font;
    private Stage stage;
    private Table table;
    private TextButton registerBtn;
    private TextureAtlas registerAtlas;
    private Skin registerSkin;


    @Override
    public void render(float delta) 
    {
        Gdx.gl.glClearColor(0,1,0,1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        stage.act(delta);

        stage.draw();
    }


    @Override
    public void show() 
    {
        stage = new Stage();
        // set input processor to stage element
        Gdx.input.setInputProcessor(stage);

        table = new Table();

        table.setBounds(0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());

        font = new BitmapFont();
        txtFieldStyle = new TextFieldStyle();
        txtFieldStyle.fontColor = Color.RED;
        txtFieldStyle.font = font;

        // initialize new text fields
        usernameTxtField = new TextField("", txtFieldStyle);
        passwordTxtField = new TextField("", txtFieldStyle);
        confirmpassTxtField = new TextField("", txtFieldStyle);
        emailTxtField = new TextField("", txtFieldStyle);

        // set size of text fields
        usernameTxtField.setSize(100, 25);
        passwordTxtField.setSize(100, 25);
        confirmpassTxtField.setSize(100, 25);
        emailTxtField.setSize(100, 25);

        // set position of text fields
        usernameTxtField.setPosition(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2 - 50);
        passwordTxtField.setPosition(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2 - 100);
        confirmpassTxtField.setPosition(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2 - 150);
        emailTxtField.setPosition(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2 - 200);

        // passproof it
        passwordTxtField.setPasswordMode(true);
        confirmpassTxtField.setPasswordMode(true);

        // register button
        registerAtlas = new TextureAtlas("resmenu/menu/registerBtn.pack");
        registerSkin = new Skin(registerAtlas);

        // new style for exit btn
        TextButtonStyle registerButtonStyle = new TextButtonStyle();

        // when user clicks on button, load new image, when he lets go reload
        // original image
        registerButtonStyle.up = registerSkin.getDrawable("menuRegisterBtn");
        registerButtonStyle.down = registerSkin.getDrawable("menuRegisterBtnPressed");

        // off set btn
        registerButtonStyle.pressedOffsetX = 1;
        registerButtonStyle.pressedOffsetY = -1;

        registerButtonStyle.font = font;

        registerBtn = new TextButton("", registerButtonStyle);
        // add new listener
        registerBtn.addListener(new ClickListener() 
        { // fire event
            public void clicked(InputEvent event, float x, float y) 
            {
                // register account and take in user input from txt fields 
                if(usernameTxtField.getText().equals("") || passwordTxtField.getText().equals("")
                        || confirmpassTxtField.getText().equals("") || emailTxtField.getText().equals(""))
                {
                    System.out.println("fields cannot be empty");
                }
                else
                {

                    registerAccount(usernameTxtField.getText(), passwordTxtField.getText(),
                                    confirmpassTxtField.getText(), emailTxtField.getText());
                }

            }
        });

        registerBtn.pad(20);

        table.bottom();
        table.row();
        table.add(usernameTxtField);
        table.row();
        table.add(passwordTxtField);
        table.row();
        table.add(confirmpassTxtField);
        table.row();
        table.add(emailTxtField);
        table.row();
        table.add(registerBtn);
        table.debug();

        stage.addActor(table);

    }

    // register account into app42api cloud db
    public void registerAccount(String username, String password, String confirmpass, String email) 
    {
        // register account
        String CUsername = username;
        String CPassword = password;
        String CConfirmPass = confirmpass;
        String CEmail = email;

        // connect to api
        WarpClient.initialize(App42Handler.apiKey, App42Handler.secretKey);

        // build user service
        UserService userService = App42API.buildUserService();
        // create user using user input and fire callback (event)
        if (CPassword.equals(CConfirmPass)) 
        {
            userService.createUser(CUsername, CPassword, CEmail, new App42CallBack() 
            {
                public void onSuccess(Object response) 
                {
                    User user = (User) response;
                    System.out.println("successfully registered: " + user.getUserName());
                    System.out.println("email is " + user.getEmail());
                }

                public void onException(Exception ex) 
                {
                    System.out.println("Exception Message: " + ex.getMessage());
                }
            });
        }
        else 
        {
            System.out.println("Passwords need to match!!");

        }
    }

    @Override
    public void input(String text) 
    {
        // TODO Auto-generated method stub

    }

    @Override
    public void canceled() {
        // TODO Auto-generated method stub

    }

    @Override
    public void resize(int width, int height) 
    {
        // TODO Auto-generated method stub

    }


    @Override
    public void pause() {
        // TODO Auto-generated method stub

    }


    @Override
    public void resume() {
        // TODO Auto-generated method stub

    }


    @Override
    public void hide() {
        // TODO Auto-generated method stub

    }


    @Override
    public void dispose() 
    {
        stage.dispose();


    }


}

所以我希望我能解释清楚。我只是尝试创建一个帐户并将其发送到App42API的云。如果有人能帮我一把，或者给我指出正确的方向，那就太好了。关于这一点没有足够的文档，尽管从目前为止我所看到的情况来看，它非常强大

谢谢，

---

德文郡

在查看了您共享的日志后，我发现有一个例外

原因：java.lang.ClassNotFoundException:org.json.jsoneException

---

因此，我建议您在应用程序中添加JSON jar库。

App42 jar依赖于一些外部jar，如commons-logging-1.1.1、commons-logging-api-1.1.1、httpclient-4.1、httpcore-4.1、JSON org。这些JAR在下载的JavaSDK zip的lib文件夹下可用。请在项目参考中添加所有这些jar文件。它将解决这个问题

---

如果有帮助，请告诉我们。

谢谢您的帮助！添加json.org jar文件修复了该错误！：）我现在在尝试注册时出现以下错误。-错误：-异常：com.shephertz.app42.paas.sdk.android.App42Exception:java.lang.IllegalArgumentException:Empty key异常消息：java.lang.IllegalArgumentException:Empty key必须先初始化app42 API实例才能调用用户服务的方法。请查看下面的链接，以获取用于初始化App42API实例的代码段（放入在成功创建应用程序后收到的访问凭据），并在调用用户服务的createUser方法之前放入此代码段。