LibGDX Tutorial 3: Splash Screen

Create project files using LibGDX-Setup-UI as

Next Import them to a workspace

Next delete implements ApplicationListener and put extends Game as

T

After adding import statement and method using Eclipse, I also entered the methods for render and dispose as

A

A barebones application for the Game class could be

Here I just log some details. When I close the window, I get

We can see the frame rate is a little more than 60 frames per second.
Any real program depends on implenting different Screens. For the simplest case, my Screens are 2 static images. The first one is called Splash Screen which will last for 5 seconds. The next is Main Screen which will exist after Splash Screen.

This is the Splash image:

This is the Main image:

First I have to add a class for implementing Screen

The log output after running the program (which is listed afterwards):

MySplashGame.java

package com.tutorials.mysplashgame;

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.utils.TimeUtils;

public class MySplashGame extends Game {
    private int rendCount; //** render count **//
    private long startTime; //** time app started **//
    private long endTime; //** time app ended **//
   
    @Override
    public void create() {
        Gdx.app.log("my Splash Game","App created");
        startTime = TimeUtils.millis();
        setScreen(new MySplashScreen(this)); //** start SpashSreen, with Game parameter **//
    }
   
    public void render() {
        super.render();
        rendCount++; //** another render - inc count **//
    }

    public void dispose() {
        Gdx.app.log("my Splash Game", "App rendered " + rendCount + " times");
        Gdx.app.log("my Splash Game", "App ended");
        endTime = TimeUtils.millis();
        Gdx.app.log("my Splash Game", "App running for " + (endTime-startTime)/1000 + " seconds.");
    }
}

MySplashScreen.java
package com.tutorials.mysplashgame;

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.utils.TimeUtils;

public class MySplashScreen implements Screen{
   
    private SpriteBatch batch;
    private Game myGame;
    private Texture texture;
    private OrthographicCamera camera;
    private long startTime;
    private int rendCount;
   
    public MySplashScreen(Game g) // ** constructor called initially **//
    {
        Gdx.app.log("my Spash Screen", "constructor called");
        myGame = g; // ** get Game parameter **//
        camera = new OrthographicCamera();
        camera.setToOrtho(false, 512, 512);
        batch = new SpriteBatch();

    }

    @Override
    public void render(float delta) {
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
        batch.setProjectionMatrix(camera.combined);
        batch.begin();
        batch.draw(texture, 0, 0);
        batch.end();
        rendCount++;
        if (TimeUtils.millis()>(startTime+5000)) myGame.setScreen(new MyMainScreen(myGame));
       
    }

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

    @Override
    public void show() {
        Gdx.app.log("my Splash Screen", "show called");
        texture = new Texture(Gdx.files.internal("splash.png")); //** texture is now the splash image **//
        startTime = TimeUtils.millis();
    }

    @Override
    public void hide() {
        Gdx.app.log("my Splash Screen", "hide called");
        Gdx.app.log("my Splash Screen", "rendered " + rendCount + " times.");
    }

    @Override
    public void pause() {
    }

    @Override
    public void resume() {
    }

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

}


MyMainScreen.java
package com.tutorials.mysplashgame;

import com.badlogic.gdx.Game;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Screen;
import com.badlogic.gdx.graphics.GL10;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;

public class MyMainScreen implements Screen {
    private SpriteBatch batch;
    private Game myGame;
    private Texture texture;
    private OrthographicCamera camera;
   
    public MyMainScreen(Game g) // ** constructor called initially **//
    {
        Gdx.app.log("my Main Screen", "constructor called");
        myGame = g; // ** get Game parameter **//
        camera = new OrthographicCamera();
        camera.setToOrtho(false, 512, 512);
        batch = new SpriteBatch();

    }

    @Override
    public void render(float delta) {
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
        batch.setProjectionMatrix(camera.combined);
        batch.begin();
        batch.draw(texture, 0, 0);
        batch.end();
    }

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

    @Override
    public void show() {
        Gdx.app.log("my Main Screen", "show called");
        texture = new Texture(Gdx.files.internal("main.png")); //** texture is now the main image **//
    }

    @Override
    public void hide() {
        Gdx.app.log("my Main Screen", "hide called");
    }

    @Override
    public void pause() {
    }

    @Override
    public void resume() {
    }

    @Override
    public void dispose() {
        Gdx.app.log("my Main Screen", "dispose called");
        texture.dispose();
        batch.dispose();
    }

}