Android 游戏开发 引擎AndEngine加载（游戏第一关加载以及物品栏道具）

package gongzibai.co.cc;

import org.anddev.andengine.engine.Engine;
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.modifier.AlphaModifier;
import org.anddev.andengine.entity.modifier.MoveYModifier;
import org.anddev.andengine.entity.modifier.ParallelEntityModifier;
import org.anddev.andengine.entity.modifier.RotationModifier;
import org.anddev.andengine.entity.modifier.ScaleModifier;
import org.anddev.andengine.entity.modifier.SequenceEntityModifier;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.opengl.texture.BuildableTexture;
import org.anddev.andengine.opengl.texture.Texture;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.builder.BlackPawnTextureBuilder;
import org.anddev.andengine.opengl.texture.builder.ITextureBuilder.TextureSourcePackingException;
import org.anddev.andengine.opengl.texture.region.TextureRegion;
import org.anddev.andengine.opengl.texture.region.TextureRegionFactory;
import org.anddev.andengine.ui.activity.BaseGameActivity;
import org.anddev.andengine.util.modifier.ease.EaseQuadOut;

import android.util.Log;

public class Level1Activity extends
BaseGameActivity {
// ===========================================================
// Constants
// ===========================================================

private static final int CAMERA_WIDTH = 567;
private static final int CAMERA_HEIGHT = 360;
private String tag = "Level1Activity";

// ===========================================================
// Fields
// ===========================================================

protected Camera mCamera;

protected Scene mMainScene;

private Texture mLevel1BackTexture;
private BuildableTexture mObstacleBoxTexture;
private TextureRegion mBoxTextureRegion;
private TextureRegion mLevel1BackTextureRegion;
private TextureRegion mBulletTextureRegion;
private TextureRegion mCrossTextureRegion;
private TextureRegion mHatchetTextureRegion;

// ===========================================================
// Constructors
// ===========================================================

// ===========================================================
// Getter & Setter
// ===========================================================

// ===========================================================
// Methods for/from SuperClass/Interfaces
// ===========================================================

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

@Override
public void onLoadResources() {
/* Load Textures. */
TextureRegionFactory
.setAssetBasePath("gfx/Level1/");
mLevel1BackTexture = new Texture(
1024,
512,
TextureOptions.BILINEAR_PREMULTIPLYALPHA);
mLevel1BackTextureRegion = TextureRegionFactory
.createFromAsset(
this.mLevel1BackTexture,
this,
"play1.jpg",
0, 0);
mEngine.getTextureManager()
.loadTexture(
this.mLevel1BackTexture);

mObstacleBoxTexture = new BuildableTexture(
256,
128,
TextureOptions.BILINEAR_PREMULTIPLYALPHA);
mBoxTextureRegion = TextureRegionFactory
.createFromAsset(
mObstacleBoxTexture,
this,
"wuqi.PNG");
mBulletTextureRegion = TextureRegionFactory
.createFromAsset(
mObstacleBoxTexture,
this,
"Bullet.png");
mCrossTextureRegion = TextureRegionFactory
.createFromAsset(
mObstacleBoxTexture,
this,
"Cross.png");
mHatchetTextureRegion = TextureRegionFactory
.createFromAsset(
mObstacleBoxTexture,
this,
"Hatchet.png");
try {
mObstacleBoxTexture
.build(new BlackPawnTextureBuilder(
2));
} catch (final TextureSourcePackingException e) {
Log.d(tag,
"Sprites won't fit in mObstacleBoxTexture");
}
this.mEngine
.getTextureManager()
.loadTexture(
this.mObstacleBoxTexture);
}

@Override
public Scene onLoadScene() {
this.mEngine
.registerUpdateHandler(new FPSLogger());

final Scene scene = new Scene(1);

/* Center the camera. */
final int centerX = (CAMERA_WIDTH - mLevel1BackTextureRegion
.getWidth()) / 2;
final int centerY = (CAMERA_HEIGHT - mLevel1BackTextureRegion
.getHeight()) / 2;

/* Create the sprites and add them to the scene. */
final Sprite background = new Sprite(
centerX, centerY,
mLevel1BackTextureRegion);
scene.getLastChild()
.attachChild(background);
final Sprite obstacleBox = new Sprite(
0.0f,
CAMERA_HEIGHT
- mBoxTextureRegion
.getHeight(),
mBoxTextureRegion);
scene.getLastChild()
.attachChild(
obstacleBox);
final Sprite bullet = new Sprite(
20.0f,
CAMERA_HEIGHT - 40.0f,
mBulletTextureRegion);
bullet.registerEntityModifier(new SequenceEntityModifier(
new ParallelEntityModifier(
new MoveYModifier(
3,
0.0f,
CAMERA_HEIGHT - 40.0f,
EaseQuadOut
.getInstance()),
new AlphaModifier(
3,
0.0f,
1.0f),
new ScaleModifier(
3,
0.5f,
1.0f)),
new RotationModifier(3,
0, 360)));
scene.getLastChild()
.attachChild(bullet);
final Sprite cross = new Sprite(
bullet.getInitialX() + 40.0f,
CAMERA_HEIGHT - 40.0f,
mCrossTextureRegion);
cross.registerEntityModifier(new SequenceEntityModifier(
new ParallelEntityModifier(
new MoveYModifier(
4,
0.0f,
CAMERA_HEIGHT - 40.0f,
EaseQuadOut
.getInstance()),
new AlphaModifier(
4,
0.0f,
1.0f),
new ScaleModifier(
4,
0.5f,
1.0f)),
new RotationModifier(2,
0, 360)));
cross.registerEntityModifier(new AlphaModifier(
10.0f, 0.0f, 1.0f));
scene.getLastChild()
.attachChild(cross);
final Sprite hatchet = new Sprite(
cross.getInitialX() + 40.0f,
CAMERA_HEIGHT - 40.0f,
mHatchetTextureRegion);
hatchet.registerEntityModifier(new SequenceEntityModifier(
new ParallelEntityModifier(
new MoveYModifier(
5,
0.0f,
CAMERA_HEIGHT - 40.0f,
EaseQuadOut
.getInstance()),
new AlphaModifier(
5,
0.0f,
1.0f),
new ScaleModifier(
5,
0.5f,
1.0f)),
new RotationModifier(2,
0, 360)));
hatchet.registerEntityModifier(new AlphaModifier(
15.0f, 0.0f, 1.0f));
scene.getLastChild()
.attachChild(hatchet);
scene.registerEntityModifier(new AlphaModifier(
10, 0.0f, 1.0f));
return scene;
}

@Override
public void onLoadComplete() {
}

}