Cannot resolve setScreen() method - libgdx

Question

I'm not new to libgdx, but when i ended up with my previous university project, and started new one, Android studio or IDEA cannot resolve setScreen method, other stuff works fine. Any ideas ? Hope for help. (project absolutely clear).

Answer 1

Creating a project in LibGdx gives you your core file which implements the ApplicationListener.
What I gather you are referring to is extending the Game class with with you set Screen classes with.
With the ApplicationListener.
public class HelloWorld implements ApplicationListener {
private SpriteBatch batch;
private BitmapFont font;
#Override
public void create() {
batch = new SpriteBatch();
font = new BitmapFont();
font.setColor(Color.RED);
}
#Override
public void dispose() {
batch.dispose();
font.dispose();
}
#Override
public void render() {
Gdx.gl.glClearColor(1, 1, 1, 1);
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
batch.begin();
font.draw(batch, "Hello World", 200, 200);
batch.end();
}
#Override
public void resize(int width, int height) {
}
#Override
public void pause() {
}
#Override
public void resume() {
}
}
What you're after: (taken from https://github.com/libgdx/libgdx/wiki/Extending-the-simple-game)
public class Drop extends Game {
public SpriteBatch batch;
public BitmapFont font;
public void create() {
batch = new SpriteBatch();
//Use LibGDX's default Arial font.
font = new BitmapFont();
this.setScreen(new MainMenuScreen(this));
}
public void render() {
super.render(); //important!
}
public void dispose() {
batch.dispose();
font.dispose();
}
}
Which allows you to change screens whenever you need:
public class MainMenuScreen implements Screen {
final Drop game;
OrthographicCamera camera;
public MainMenuScreen(final Drop game) {
this.game = game;
camera = new OrthographicCamera();
camera.setToOrtho(false, 800, 480);
}
//...Rest of class omitted for succinctness.
}

Answer 2

For default, gdx main Class will extends ApplicationAdapter, you need extends Game class for get use of setScreen()