Java Can'；t开关屏幕[Libgdx]_Java_Android_Libgdx

Java Can'；t开关屏幕[Libgdx]

java android libgdx

Java Can'；t开关屏幕[Libgdx],java,android,libgdx,Java,Android,Libgdx,我是libgdx新手，我不知道我做错了什么。在我的游戏中，我只想在2个screens之间切换（第一个是菜单屏幕，第二个是游戏屏幕）。我已经创建了两个screens和一个游戏类，看起来都不错。但是当我调用我的方法setScreen（newgamescreen（））时，什么都没有发生。我还应该说，我在以前的项目中使用了screen和game类，一切正常，当我将当前代码与以前的代码进行比较时，我看不到任何差异，因此非常奇怪这是我的MenuScreen课程： MenuScreen implement

我是libgdx新手，我不知道我做错了什么。在我的游戏中，我只想在2个

screen

s之间切换（第一个是菜单屏幕，第二个是游戏屏幕）。我已经创建了两个

screen

s和一个游戏类，看起来都不错。但是当我调用我的方法

setScreen（newgamescreen（））

时，什么都没有发生。我还应该说，我在以前的项目中使用了

screen

和

game

类，一切正常，当我将当前代码与以前的代码进行比较时，我看不到任何差异，因此非常奇怪

这是我的

MenuScreen

课程：

MenuScreen implements Screen {

private SpriteBatch batch ;
private Texture texture;
private float timePassed;


public MenuScreen() {
    timePassed = 0;
    batch = new SpriteBatch();
    texture = new Texture("texture.png");

@Override
public void render (float delta) {
    timePassed += Gdx.graphics.getDeltaTime();
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    if (timePassed > 5) {GameClass.getInstance().setScreen(new GameScreen());} //it looks strange, but it's to check if all works properly
    batch.begin();
    batch.draw(texture, 0, 0);
    batch.end();
}

@Override
public void dispose() {
    batch.dispose();
    texture.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

GameScreen implements Screen {

private SpriteBatch batch2 ;
private Texture texture2;


public MenuScreen() {
    batch2 = new SpriteBatch();
    texture2 = new Texture("texture2.png");
}
@Override
public void render (float delta) {
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    batch2.begin();
    batch2.draw(texture2, 0, 0);
    batch2.end();
}

@Override
public void dispose() {
    batch2.dispose();
    texture2.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

public class ClassGame extends Game {
public static ClassGame getInstance(){
    ClassGame instance = new ClassGame();
    return instance;
}
@Override
public Screen getScreen() {
    return super.getScreen();
}

@Override
public void setScreen(Screen screen) {
    super.setScreen(screen);
}
@Override
public void resize(int width, int height) {
    super.resize(width, height);
}

@Override
public void render() {
    super.render();
}

@Override
public void resume() {
    super.resume();
}

@Override
public void pause() {
    super.pause();
}

@Override
public void dispose() {
    super.dispose();
}

public ClassGame() {
    super();
}

@Override
public void create() {
    MenuScreen menuScreen = new MenuScreen();
    setScreen(menuScreen);
}}

这是我的

GameScreen

课程：

MenuScreen implements Screen {

private SpriteBatch batch ;
private Texture texture;
private float timePassed;


public MenuScreen() {
    timePassed = 0;
    batch = new SpriteBatch();
    texture = new Texture("texture.png");

@Override
public void render (float delta) {
    timePassed += Gdx.graphics.getDeltaTime();
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    if (timePassed > 5) {GameClass.getInstance().setScreen(new GameScreen());} //it looks strange, but it's to check if all works properly
    batch.begin();
    batch.draw(texture, 0, 0);
    batch.end();
}

@Override
public void dispose() {
    batch.dispose();
    texture.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

GameScreen implements Screen {

private SpriteBatch batch2 ;
private Texture texture2;


public MenuScreen() {
    batch2 = new SpriteBatch();
    texture2 = new Texture("texture2.png");
}
@Override
public void render (float delta) {
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    batch2.begin();
    batch2.draw(texture2, 0, 0);
    batch2.end();
}

@Override
public void dispose() {
    batch2.dispose();
    texture2.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

public class ClassGame extends Game {
public static ClassGame getInstance(){
    ClassGame instance = new ClassGame();
    return instance;
}
@Override
public Screen getScreen() {
    return super.getScreen();
}

@Override
public void setScreen(Screen screen) {
    super.setScreen(screen);
}
@Override
public void resize(int width, int height) {
    super.resize(width, height);
}

@Override
public void render() {
    super.render();
}

@Override
public void resume() {
    super.resume();
}

@Override
public void pause() {
    super.pause();
}

@Override
public void dispose() {
    super.dispose();
}

public ClassGame() {
    super();
}

@Override
public void create() {
    MenuScreen menuScreen = new MenuScreen();
    setScreen(menuScreen);
}}

和

游戏

课程：

MenuScreen implements Screen {

private SpriteBatch batch ;
private Texture texture;
private float timePassed;


public MenuScreen() {
    timePassed = 0;
    batch = new SpriteBatch();
    texture = new Texture("texture.png");

@Override
public void render (float delta) {
    timePassed += Gdx.graphics.getDeltaTime();
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    if (timePassed > 5) {GameClass.getInstance().setScreen(new GameScreen());} //it looks strange, but it's to check if all works properly
    batch.begin();
    batch.draw(texture, 0, 0);
    batch.end();
}

@Override
public void dispose() {
    batch.dispose();
    texture.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

GameScreen implements Screen {

private SpriteBatch batch2 ;
private Texture texture2;


public MenuScreen() {
    batch2 = new SpriteBatch();
    texture2 = new Texture("texture2.png");
}
@Override
public void render (float delta) {
    Gdx.gl.glClearColor(1, 0, 0, 1);
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    batch2.begin();
    batch2.draw(texture2, 0, 0);
    batch2.end();
}

@Override
public void dispose() {
    batch2.dispose();
    texture2.dispose();
}

@Override
public void hide() {

}

@Override
public void resume() {

}

@Override
public void pause() {

}

@Override
public void resize(int width, int height) {

}

@Override
public void show() {

}}

public class ClassGame extends Game {
public static ClassGame getInstance(){
    ClassGame instance = new ClassGame();
    return instance;
}
@Override
public Screen getScreen() {
    return super.getScreen();
}

@Override
public void setScreen(Screen screen) {
    super.setScreen(screen);
}
@Override
public void resize(int width, int height) {
    super.resize(width, height);
}

@Override
public void render() {
    super.render();
}

@Override
public void resume() {
    super.resume();
}

@Override
public void pause() {
    super.pause();
}

@Override
public void dispose() {
    super.dispose();
}

public ClassGame() {
    super();
}

@Override
public void create() {
    MenuScreen menuScreen = new MenuScreen();
    setScreen(menuScreen);
}}

我明白了，伙计们。在我以前的项目中，我在getInstance（）之外声明了

instance

字段。像这样：

    public static GameClass instance = new GameClass();

    public static GameClass getInstance(){
          return instance;
}

但我仍然需要你的帮助。我不知道这个小东西怎么不让我切换屏幕。

我就是这样解决同样的问题的，我上了三节课，两个屏幕在它们之间切换。在这里，我使用一个图像参与者作为按钮在第二个和第三个之间切换。我还在每个类中使用了两个构造函数，其中一个是没有参数的构造函数，下面是我的代码，希望您能得到它。我的主要班级代码：

public class First extends Game{
private Game game;
public Main(){ game=this; }
public void create() {
    game.setScreen(new Second(game)); }}

下面是我的第一个屏幕类代码

public class Second implements Screen{
private Game second;
public Second(Game second){this.second=second;}
public Second(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image secondButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show(){
    myGroup.addActor(secondButton);
    secondButton.addListener(new InputListener(){
    second.setScreen(new Third(second)); });}
public void render(float delta) {
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    myStage.act(Gdx.graphics.getDeltaTime());
     myStage.draw(); }
public void resize(int width, int height) {}
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}

 public class Third implements Screen{
private Game third;
public Third(Game third){
    this.third=third;}
public Third(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image thirdButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show() {
    myGroup.addActor(thirdButton);
    thirdButton.addListener(new InputListener(){
        third.setScreen(new Third(third));});}
public void render(float delta) {
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    myStage.act(Gdx.graphics.getDeltaTime());
    myStage.draw();}
public void resize(int width, int height) {    }
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}

还有我的下一个屏幕类代码

public class Second implements Screen{
private Game second;
public Second(Game second){this.second=second;}
public Second(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image secondButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show(){
    myGroup.addActor(secondButton);
    secondButton.addListener(new InputListener(){
    second.setScreen(new Third(second)); });}
public void render(float delta) {
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    myStage.act(Gdx.graphics.getDeltaTime());
     myStage.draw(); }
public void resize(int width, int height) {}
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}

 public class Third implements Screen{
private Game third;
public Third(Game third){
    this.third=third;}
public Third(){}
// your code
Stage myStage=new Stage(new ScreenViewport());
Group myGroup=new Group();
Image thirdButton=new Image(new Texture(Gdx.files.internal("image.png")));
public void show() {
    myGroup.addActor(thirdButton);
    thirdButton.addListener(new InputListener(){
        third.setScreen(new Third(third));});}
public void render(float delta) {
    Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
    myStage.act(Gdx.graphics.getDeltaTime());
    myStage.draw();}
public void resize(int width, int height) {    }
public void pause(){}
public void resume(){}
public void hide(){}
public void dispose(){}}}

这行得通吗？我写了一封回复信，但不得不离开工作。如果你仍然不明白，我将在明天用代码回答：基本上你的GameClass是控制游戏并决定做什么的人，但在你的屏幕内，你调用getInstance（）返回一个新的GameClass，而不是控制游戏的人，所以你可能不会看到任何事情发生。希望不会造成更大的混乱