Android Game using AndEngine

We will learn how to develop a game using AndEngine which is a openSource, free game engine for android.
Step :1. Download the AndEngine from here :

AndEngine.jar

Step :2. Create a new project using motodev.

Step :3. Create a new folder ‘lib’ and paste AndEngine.jar file there.

Paste the AndEngine.jar file

Step :4. Go to project properyies and add AndEngine.jar file in the build path.

Step :5. Open MainActivity.java file and extend it to the BaseActivity

Step :6 You will get an error thrown. Now import the default methods of AndEngine.

Step :7. Your Main activity will look like this. These four are the default method of AndEngine

a)onLoadEngine()
a)onLoadResources()
a)onLoadScene()
a)onLoadComplete()

package com.andenginedemo;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.ui.activity.BaseGameActivity;

public class MainActivity  extends BaseGameActivity {

@Override
public Engine onLoadEngine() {
// TODO Auto-generated method stub
return null;
}

@Override
public void onLoadResources() {
// TODO Auto-generated method stub

}

@Override
public Scene onLoadScene() {
// TODO Auto-generated method stub
return null;
}

@Override
public void onLoadComplete() {
// TODO Auto-generated method stub

}
/** Called when the activity is first created. */

}

Step :7. Open the assets folder and create a folder gfx and put the ball.png file there.

Step :8. Now put following code in your MainActivity.java class

package com.andenginedemo;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.ui.activity.BaseGameActivity;

import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.options.EngineOptions;
import org.anddev.andengine.engine.options.EngineOptions.ScreenOrientation;
import org.anddev.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;

import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.Texture;
import org.anddev.andengine.opengl.texture.region.TextureRegion;
import org.anddev.andengine.opengl.texture.region.TextureRegionFactory;

public class MainActivity  extends BaseGameActivity {

private static final int CAMERA_WIDTH = 720;
private static final int CAMERA_HEIGHT = 480;

private Camera _refCamera;
private Texture _ballBitmapTexture;
private TextureRegion _ballTextureRegion;

@Override
public Engine onLoadEngine() {
this._refCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
return new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this._refCamera));
}

@Override
public void onLoadResources() {
this._ballBitmapTexture =  new Texture(256,256, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
this._ballTextureRegion= TextureRegionFactory.createFromAsset(this._ballBitmapTexture, this, "gfx/ball.png", 0, 0); // 64x32
this.mEngine.getTextureManager().loadTexture(this._ballBitmapTexture);
}

@Override
public Scene onLoadScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());
Scene scene = new Scene(2);
scene.setBackground(new ColorBackground(0.0000f, 0.0000f, 0.0000f));
/* Calculate the coordinates for the face, so its centered on the camera. */
final int centerX = (CAMERA_WIDTH - this._ballTextureRegion.getWidth()) / 2;
final int centerY = (CAMERA_HEIGHT - this._ballTextureRegion.getHeight()) / 2;

/* Create the face and add it to the scene. */
final Sprite face = new Sprite(centerX, centerY, this._ballTextureRegion);
scene.getTopLayer().addEntity(face);
return scene;
}

@Override
public void onLoadComplete() {

}

}

Step :9. Run your app it will look like this. Enjoy

Tags: alpha effect, An Android application, AndEngine, AndEngineGame, Android components, Android Game, animation in Android, Apple, Blinking effect, Game Programming, Key Event, Key Event handler, Movement, Splash screen, Timer, Touch, TouchEvent, Transition