无法切换屏幕 [Libgdx]
Can't switch screen [Libgdx]
我是 libgdx 的新手,我不知道自己做错了什么。
在我的游戏中,我只想在 2 screen
之间切换(第一个是 menuScreen,第二个是 gameScreen)。我创建了这两个 screen
和一个游戏 class,看起来一切正常。但是当我调用我的方法时 setScreen(new GameScreen())
没有任何反应。另外我应该说,我在我以前的项目中使用了 screen
和 game
classes 并且一切正常,当我将我当前的代码与之前的代码进行比较时,我没有看到任何差异,所以很是好奇。
这是我的 MenuScreen
class:
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() {
}}
这是我的 GameScreen
class:
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() {
}}
和Game
class:
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。在我之前的项目中,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。
这就是我解决同样问题的方法,我有三个 classes 供两个屏幕在它们之间切换。在这里,我使用图像演员在第二和第三之间切换,因为 button.I 在每个 class 中也使用了两个构造函数,其中一个构造函数没有参数,下面是我的代码希望你能明白。
我的主要 class 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class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(){}}}
还有我的下一个屏幕class代码
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(){}}}
我是 libgdx 的新手,我不知道自己做错了什么。
在我的游戏中,我只想在 2 screen
之间切换(第一个是 menuScreen,第二个是 gameScreen)。我创建了这两个 screen
和一个游戏 class,看起来一切正常。但是当我调用我的方法时 setScreen(new GameScreen())
没有任何反应。另外我应该说,我在我以前的项目中使用了 screen
和 game
classes 并且一切正常,当我将我当前的代码与之前的代码进行比较时,我没有看到任何差异,所以很是好奇。
这是我的 MenuScreen
class:
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() {
}}
这是我的 GameScreen
class:
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() {
}}
和Game
class:
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。在我之前的项目中,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。
这就是我解决同样问题的方法,我有三个 classes 供两个屏幕在它们之间切换。在这里,我使用图像演员在第二和第三之间切换,因为 button.I 在每个 class 中也使用了两个构造函数,其中一个构造函数没有参数,下面是我的代码希望你能明白。 我的主要 class 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class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(){}}}
还有我的下一个屏幕class代码
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(){}}}