<分区>
我是 java 和 libgdx 的新手,我想创建一个主菜单屏幕,有人可以给我一个简单的例子吗?
<分区>
我是 java 和 libgdx 的新手,我想创建一个主菜单屏幕,有人可以给我一个简单的例子吗?
最佳答案
你问的很广泛,它涉及很多元素,比如创建按钮、皮肤、设置表格等。无论如何你应该为此使用屏幕,添加一个舞台并向舞台添加 Actor 。最后,您需要将 Listeners 添加到您的按钮 actor 以切换屏幕。这是我为您制作的:
public class TestScreen implements Screen{
private SpriteBatch batch;
protected Stage stage;
private Viewport viewport;
private OrthographicCamera camera;
private TextureAtlas atlas;
protected Skin skin;
public TestScreen()
{
atlas = new TextureAtlas("skin.atlas");
skin = new Skin(Gdx.files.internal("skin.json"), atlas);
batch = new SpriteBatch();
camera = new OrthographicCamera();
viewport = new FitViewport(Constants.WorldWidth, Constants.WorldHeight, camera);
viewport.apply();
camera.position.set(camera.viewportWidth / 2, camera.viewportHeight / 2, 0);
camera.update();
stage = new Stage(viewport, batch);
}
@Override
public void show() {
//Stage should controll input:
Gdx.input.setInputProcessor(stage);
//Create Table
Table mainTable = new Table();
//Set table to fill stage
mainTable.setFillParent(true);
//Set alignment of contents in the table.
mainTable.top();
//Create buttons
TextButton playButton = new TextButton("Play", skin);
TextButton optionsButton = new TextButton("Options", skin);
TextButton exitButton = new TextButton("Exit", skin);
//Add listeners to buttons
playButton.addListener(new ClickListener(){
@Override
public void clicked(InputEvent event, float x, float y) {
((Game)Gdx.app.getApplicationListener()).setScreen(new PlayScreen());
}
});
exitButton.addListener(new ClickListener(){
@Override
public void clicked(InputEvent event, float x, float y) {
Gdx.app.exit();
}
});
//Add buttons to table
mainTable.add(playButton);
mainTable.row();
mainTable.add(optionsButton);
mainTable.row();
mainTable.add(exitButton);
//Add table to stage
stage.addActor(mainTable);
}
@Override
public void render(float delta) {
Gdx.gl.glClearColor(.1f, .12f, .16f, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
stage.act();
stage.draw();
}
@Override
public void resize(int width, int height) {
viewport.update(width, height);
camera.position.set(camera.viewportWidth / 2, camera.viewportHeight / 2, 0);
camera.update();
}
@Override
public void pause() {
}
@Override
public void resume() {
}
@Override
public void hide() {
}
@Override
public void dispose() {
skin.dispose();
atlas.dispose();
}
}
我这样调用它是通过稍微改变初始类。
//Let the class extend from game
public class MyGame extends Game()
{
//Delete everything in it and leave a create() with a single line
@Override
public void create() {
setScreen(new MenuScreen());
}
}
当然,要使上述代码正常工作,您需要设置一个 Skin
和 Atlas
来绘制按钮。但是,您可以只添加图像和字体并手动创建按钮。反正我就是answered a question我在其中深入介绍了如何创建 Skin
和 Atlas
。
编辑 虽然已经询问了菜单类的示例,但用户询问者实际上只需要知道如何从一个屏幕切换到另一个屏幕。有点尴尬,但幸运的是,编写上面的代码只花了几分钟;)。
您始终可以使用 Gdx.app.getApplicationListener
从任何地方访问 ApplicationListener
。您可以将其转换为 Game
以访问 setScreen
。
((Game)Gdx.app.getApplicationListener()).setScreen(new GameScreen());
或者您可以手动传递初始 Game 对象或 applicationListener。确保新屏幕接受游戏对象。
public class MenuScreen
{
private Game gameObject;
public MenuScreen(Game gameObject)
{
this.gameObject = gameObject;
}
private void someMethod()
{
//Switches to a new MenuScreen...
//useless in most cases but you get the idea
gameObject.setScreen(new MenuScreen(gameObject);
}
}
关于java - 如何创建 libgdx 主菜单屏幕,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32451921/