Create Main Menu Scene

* Creating Main Menu Scene

In this post I will be showing you how to create main menu scene. Follow the steps below,

1. First off all lets have a look at graphics below,
menuback.png

play.png

scores.png

> play button will navigate you to level selector scene

> scores button will navigate you to high score scene

2. Go to ResourcesManager class and define textures

    public ITextureRegion menu_background_region;

    public ITextureRegion play_region;

    public ITextureRegion scores_region;

    private BuildableBitmapTextureAtlas menuTextureAtlas;

Go to load menu graphics and put below code

private void loadMenuGraphics()

    {

    BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/menu/");

    menuTextureAtlas = new BuildableBitmapTextureAtlas(activity.getTextureManager(), 1024, 1024, TextureOptions.BILINEAR);

    menu_background_region = BitmapTextureAtlasTextureRegionFactory.createFromAsset(menuTextureAtlas, activity, "menuback.png");

    play_region = BitmapTextureAtlasTextureRegionFactory.createFromAsset(menuTextureAtlas, activity, "play.png");

    scores_region = BitmapTextureAtlasTextureRegionFactory.createFromAsset(menuTextureAtlas, activity, "scores.png");

    try 

    {

       this.menuTextureAtlas.build(new BlackPawnTextureAtlasBuilder<IBitmapTextureAtlasSource, BitmapTextureAtlas>(0, 1, 0));

       this.menuTextureAtlas.load();

    } 

    catch (final TextureAtlasBuilderException e)

    {

           Debug.e(e);

    }

    }

We are done with loading assets.

3. Now lets create the new class called MainMenuScene as below,

package com.mindew.fruitecollector;

import org.andengine.audio.music.Music;

import org.andengine.entity.scene.menu.MenuScene;

import org.andengine.entity.scene.menu.MenuScene.IOnMenuItemClickListener;

import org.andengine.entity.scene.menu.item.IMenuItem;

import org.andengine.entity.scene.menu.item.SpriteMenuItem;

import org.andengine.entity.scene.menu.item.decorator.ScaleMenuItemDecorator;

import org.andengine.entity.sprite.Sprite;

import org.andengine.opengl.util.GLState;

import org.andengine.engine.camera.*;

import com.mindew.fruitecollector.SceneManager.SceneType;

public class MainMenuScene extends BaseScene implements IOnMenuItemClickListener {

private MenuScene menuChildScene;

private final int MENU_PLAY = 0;

private final int MENU_SCORES = 1;

GameActivity act;

@Override

public void createScene() {

// TODO Auto-generated method stub

createBackground();

createMenuChildScene();

}

@Override

public void onBackKeyPressed() {

// TODO Auto-generated method stub

System.exit(0);

}

@Override

public SceneType getSceneType() {

// TODO Auto-generated method stub

               //return the proper scene type

return SceneType.SCENE_MENU;

}

@Override

public void disposeScene() {

// TODO Auto-generated method stub

}

public void createBackground()

{

attachChild(new Sprite(0, 0, resourcesManager.menu_background_region, vbom)

   {

       @Override

       protected void preDraw(GLState pGLState, Camera pCamera) 

       {

           super.preDraw(pGLState, pCamera);

           pGLState.enableDither();

       }

   });

}

private void createMenuChildScene()

{

   menuChildScene = new MenuScene(camera);

   menuChildScene.setPosition(0, 0);

   

   final IMenuItem playMenuItem = new ScaleMenuItemDecorator(new SpriteMenuItem(MENU_PLAY, resourcesManager.play_region, vbom), 1.2f, 1);

   final IMenuItem scoresMenuItem = new ScaleMenuItemDecorator(new SpriteMenuItem(MENU_SCORES, resourcesManager.scores_region, vbom), 1.2f, 1);

   

   menuChildScene.addMenuItem(playMenuItem);

   menuChildScene.addMenuItem(scoresMenuItem);

   

   menuChildScene.buildAnimations();

   menuChildScene.setBackgroundEnabled(false);

   

   playMenuItem.setPosition(playMenuItem.getX(), playMenuItem.getY() + 10);

   scoresMenuItem.setPosition(327, 380);

   

   menuChildScene.setOnMenuItemClickListener(this);

   

   setChildScene(menuChildScene);

}

@Override

public boolean onMenuItemClicked(MenuScene pMenuScene, IMenuItem pMenuItem,

float pMenuItemLocalX, float pMenuItemLocalY) {

// TODO Auto-generated method stub

switch(pMenuItem.getID())

        {

        case MENU_PLAY:

        //SceneManager.getInstance().createLMenuScene();

            return true;

        case MENU_SCORES:

        //SceneManager.getInstance().createScoresScene();

            return true;

        default:

            return false;

    }

}

}

Explanations: In above code first we define the MenuChildScene called menuChildScene and then defined and initialized int variabled MENU_PLAY and MENU_SCORES.

Returned the scene type in method getSceneType().

Created background for our menu scene in method createBackground() and used it inside createScene().

Created menu child scene in method createMenuChildScene() and  used it inside createScene().

Run the project and see your game main menu.