LibGDX entrée textfield provoque accident

Question

donc je suis en train de faire un écran de connexion, maintenant le problème est, quand je texte d'entrée dans le champ de texte, mon jeu se bloque juste, c'est ma classe mainmenu:

import com.badlogic.gdx.Gdx; 
import com.badlogic.gdx.Screen; 
import com.badlogic.gdx.graphics.Color; 
import com.badlogic.gdx.graphics.Texture; 
import com.badlogic.gdx.graphics.Texture.TextureFilter; 
import com.badlogic.gdx.graphics.g2d.BitmapFont; 
import com.badlogic.gdx.graphics.g2d.Sprite; 
import com.badlogic.gdx.graphics.g2d.SpriteBatch; 
import com.badlogic.gdx.graphics.g2d.TextureAtlas; 
import com.badlogic.gdx.scenes.scene2d.Stage; 
import com.badlogic.gdx.scenes.scene2d.ui.Label; 
import com.badlogic.gdx.scenes.scene2d.ui.Label.LabelStyle; 
import com.badlogic.gdx.scenes.scene2d.ui.Skin; 
import com.badlogic.gdx.scenes.scene2d.ui.Table; 
import com.badlogic.gdx.scenes.scene2d.ui.TextField; 
import com.badlogic.gdx.scenes.scene2d.ui.TextField.TextFieldListener; 
import com.badlogic.gdx.scenes.scene2d.ui.TextField.TextFieldStyle; 

import eu.skillaria.client.GameClient; 

public class MainMenu implements Screen { 
    GameClient client; 

    Texture background; 
    Sprite backgroundSprite; 
    SpriteBatch spriteBatch; 
    Table table; 
    Stage stage; 

    TextureAtlas menuAtlas; 
    Skin menuSkin; 

    Label info; 
    BitmapFont mainFont; 
    Label lblUsername, lblPassword; 
    TextField txtUsername, txtPassword; 

    public MainMenu(GameClient client) { 
     this.client = client; 
    } 

    @Override 
    public void render(float delta) { 

     spriteBatch.begin(); 
     backgroundSprite.draw(spriteBatch); 
     spriteBatch.end(); 

     stage.act(Gdx.graphics.getDeltaTime()); 
     stage.draw(); 
    } 

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

    } 

    @Override 
    public void show() { 

     stage = new Stage(Gdx.graphics.getWidth(), Gdx.graphics.getHeight(), true); 
     Gdx.input.setInputProcessor(stage); 

     mainFont = new BitmapFont(Gdx.files.internal("data/fonts/main.fnt"), false); 
     mainFont.setColor(1, 1, 1, 1); 
     background = new Texture("data/images/background.png"); 
     background.setFilter(TextureFilter.Linear, TextureFilter.Linear); 
     backgroundSprite = new Sprite(background); 
     backgroundSprite.setPosition(0, 0); 

     spriteBatch = new SpriteBatch(); 
     table = new Table(); 

     menuSkin = new Skin(); 
     menuAtlas = new TextureAtlas("data/packs/menu.pack"); 

     menuSkin.addRegions(menuAtlas); 

     LabelStyle infoStyle = new LabelStyle(mainFont, Color.WHITE); 

     info = new Label("Hello there and welcome.", infoStyle); 
     info.setBounds(110, 355, 585, 90); 
     info.setAlignment(2); 

     lblUsername = new Label("Username:", infoStyle); 
     lblPassword = new Label("Password:", infoStyle); 


     TextFieldStyle txtStyle = new TextFieldStyle(); 
     txtStyle.background = menuSkin.getDrawable("textbox"); 
     txtStyle.font = mainFont; 

     txtUsername = new TextField("", txtStyle); 
     txtPassword = new TextField("", txtStyle); 
     txtPassword.setPasswordMode(true); 
     txtPassword.setPasswordCharacter('*'); 
     txtUsername.setMessageText("test"); 

     txtUsername.setTextFieldListener(new TextFieldListener() { 

      @Override 
      public void keyTyped(TextField textField, char key) { 
        Gdx.app.log("Skillaria", "" + key); 
      } 
     }); 

     txtPassword.setTextFieldListener(new TextFieldListener() { 

      @Override 
      public void keyTyped(TextField textField, char key) { 

        Gdx.app.log("Skillaria", "" + key); 
      } 
     }); 

     table.add(lblUsername).pad(2); 
     table.row(); 
     table.add(txtUsername).pad(2); 
     table.row().pad(10); 
     table.add(lblPassword).pad(2); 
     table.row(); 
     table.add(txtPassword).pad(2); 
     table.setBounds(110, 225, 585, 200); 

     stage.addActor(info); 
     stage.addActor(table); 
    } 

    @Override 
    public void hide() { 
     // 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 dispose() { 
     spriteBatch.dispose(); 
     background.dispose(); 
     stage.dispose(); 
     menuSkin.dispose(); 
     menuAtlas.dispose(); 
     mainFont.dispose(); 

    } 


} 

et quand je entrée quelque chose que je reçois cette erreur:

Skillaria: t 
Exception in thread "LWJGL Application" java.lang.NullPointerException 
    at com.badlogic.gdx.scenes.scene2d.ui.TextField.draw(TextField.java:514) 
    at com.badlogic.gdx.scenes.scene2d.Group.drawChildren(Group.java:125) 
    at com.badlogic.gdx.scenes.scene2d.Group.draw(Group.java:56) 
    at com.badlogic.gdx.scenes.scene2d.ui.WidgetGroup.draw(WidgetGroup.java:150) 
    at com.badlogic.gdx.scenes.scene2d.ui.Table.draw(Table.java:95) 
    at com.badlogic.gdx.scenes.scene2d.Group.drawChildren(Group.java:111) 
    at com.badlogic.gdx.scenes.scene2d.Group.draw(Group.java:56) 
    at com.badlogic.gdx.scenes.scene2d.Stage.draw(Stage.java:185) 
    at eu.skillaria.client.screen.MainMenu.render(MainMenu.java:52) 
    at com.badlogic.gdx.Game.render(Game.java:46) 
    at eu.skillaria.client.GameClient.render(GameClient.java:23) 
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:207) 
    at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:114) 

J'ai essayé beaucoup de choses déjà, mais je continue à obtenir cette erreur, j'espère que quelqu'un peut me aider ..

Answer 1

courrais dans ce même problème, donc est ici votre un nswer.

TextFieldStyle.fontColor n'est pas sur la couleur de la police, vous devez définir manuellement, dans votre cas

txtStyle.fontColor = Color.WHITE;