Libgdx Screens are not swapping

java, libgdx, screen

Solution

You aren't using the game class properly. You shouldn't do any rendering there, that's the screens' task.

You should check out the libgdx screen and game classes wiki page. The usage should be somewhere like this:

public class MyGame extends Game {
        @Override
        public void create() {
                setScreen(new RedScreen(this));              
        }
 }

and have a RedScreen like this:

public class RedScreen implements Screen {
    MyGame game; 
    public RedScreen(MyGame game){
            this.game = game;
    }

    public void render(float delta) {
        if(Gdx.input.justTouched())
            game.setScreen(new GreenScreen(game);

         //render red screen
         Gdx.gl.glClearColor(1, 0, 0, 1);
         Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
    }
    // ... more screen functions
}

and have a GreenScreen like this:

public class GreenScreen implements Screen {
    MyGame game; 
    public MainMenuScreen(MyGame game){
            this.game = game;
    }

    public void render(float delta) {
         //render green screen
         Gdx.gl.glClearColor(0, 1, 0, 1);
         Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
    }
    // ... more screen functions
}

Problem

I am new to Libgdx and I was wrote a class that extends the Game class, the thing is that the setScreen() method from Game is not swapping the screens because after I set the screen my game still renders only what is in the render method from the game class and not what is in the render method of screen class. This is the code: If a run this code I only get a red screen even though I change screens when the user touches(clicks) the screen ``` class myGame extends Game { GameScreen myOtherScreen; public void create() { //create other screen myMenuScreen = new GameScreen(); } public void render(float delta) { // change screens if screen touched if(Gdx.input.justTouched()) setScreen(myOtherScreen); //render red screen Gdx.gl.glClearColor(1, 0, 0, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); } . . //other methods . } // ======= Screen Class ======== public class GameScreen implements Screen { @Override public void render(float delta) { //render green screen Gdx.gl.glClearColor(0, 1, 0, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); } . . //other methods . } ```

Original source