我一直在使用 Android、Libgdx、Tiled Maps 和 App42API 的后端 API 用 Java 开发 2D 游戏。我目前正在尝试实现一些“多人”功能，所以我决定添加用户注册/登录。在我的主菜单中按下注册按钮后，我遇到以下错误：
Exception :com.shephertz.app42.paas.sdk.android.App42Exception: java.lang.IllegalArgumentException: Empty key
registration failed...
Exception Message: java.lang.IllegalArgumentException: Empty key
这是我适用的类的代码：
Register.java：
import com.badlogic.gdx.Gdx;
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
{
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());
}
}
});
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;
try
{
// connect to api
WarpClient.initialize(App42Handler.apiKey, App42Handler.secretKey);
System.out.println("initialized app42api...");
}
catch(Exception e)
{
e.printStackTrace();
System.out.println("cant initialize api...");
}
// build user service
UserService userService = App42API.buildUserService();
System.out.println("built user api service...");
System.out.println("Username: " + CUsername + " -" + " Password: " + CPassword + " -" +" Email: " + CEmail );
// create user using user input and fire callback (event)
if (CPassword.equals(CCCodeonfirmPass))
{
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("registration failed...");
System.out.println("Exception Message: " + ex.getMessage());
}
});
}
else
{
System.out.println("Passwords need to match!!");
}
}
@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();
}
}
该脚本在用户按下主菜单上的注册按钮时执行，然后从该按钮加载主菜单 GUI。在将正确的信息放入文本字段并按下注册按钮后，它会调用 register 方法，然后从该方法中抛出异常。
请让我知道我可以做些什么来让这个备份和工作。只是想找人指出我正确的方向！
亲切的问候，德文。