如何使用AndEngine移动精灵对象(Android)

Question

我正在使用andengine在android中开发游戏.我在sprite中放置了一个对象

 this.mTexture = new Texture(32, 32, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
            this.mFaceTextureRegion = TextureRegionFactory.createFromAsset(this.mTexture, this, "gfx/bike.png", 0, 0);
---- and i place like 
Sprite bikeSprite= new Sprite(20, 50, this.mFaceTextureRegion);

我想在j2me精灵中使用这个精灵

bikeSprite.move(--);我怎么在android中做到这一点.我不想使用setPosition.

Answer 1

public class EntityModifierExample extends BaseExample {
    // ===========================================================
    // Constants
    // ===========================================================

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

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

    private Camera mCamera;
    private Texture mTexture;
    private TiledTextureRegion mFaceTextureRegion;

    // ===========================================================
    // 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() {
        this.mTexture = new Texture(64, 32, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
        this.mFaceTextureRegion = TextureRegionFactory.createTiledFromAsset(this.mTexture, this, "gfx/face_box_tiled.png", 0, 0, 2, 1);

        this.mEngine.getTextureManager().loadTexture(this.mTexture);
    }

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

        final Scene scene = new Scene();
        scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));

        final int centerX = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
        final int centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;

        final Rectangle rect = new Rectangle(centerX + 100, centerY, 32, 32);
        rect.setColor(1, 0, 0);

        final AnimatedSprite face = new AnimatedSprite(centerX - 100, centerY, this.mFaceTextureRegion);
        face.animate(100);
        face.setBlendFunction(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);

        final LoopEntityModifier entityModifier =
            new LoopEntityModifier(
                    new IEntityModifierListener() {
                        @Override
                        public void onModifierStarted(final IModifier<IEntity> pModifier, final IEntity pItem) {
                            EntityModifierExample.this.runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(EntityModifierExample.this, "Sequence started.", Toast.LENGTH_LONG).show();
                                }
                            });
                        }

                        @Override
                        public void onModifierFinished(final IModifier<IEntity> pEntityModifier, final IEntity pEntity) {
                            EntityModifierExample.this.runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(EntityModifierExample.this, "Sequence finished.", Toast.LENGTH_LONG).show();
                                }
                            });
                        }
                    },
                    1,
                    new ILoopEntityModifierListener() {
                        @Override
                        public void onLoopStarted(final LoopModifier<IEntity> pLoopModifier, final int pLoop, final int pLoopCount) {
                            EntityModifierExample.this.runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(EntityModifierExample.this, "Loop: '" + (pLoop + 1) + "' of '" + pLoopCount + "' started.", Toast.LENGTH_SHORT).show();
                                }
                            });
                        }

                        @Override
                        public void onLoopFinished(final LoopModifier<IEntity> pLoopModifier, final int pLoop, final int pLoopCount) {
                            EntityModifierExample.this.runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(EntityModifierExample.this, "Loop: '" + (pLoop + 1) + "' of '" + pLoopCount + "' finished.", Toast.LENGTH_SHORT).show();
                                }
                            });
                        }
                    },
                    new SequenceEntityModifier(
                            new RotationModifier(1, 0, 90),
                            new AlphaModifier(2, 1, 0),
                            new AlphaModifier(1, 0, 1),
                            new ScaleModifier(2, 1, 0.5f),
                            new DelayModifier(0.5f),
                            new ParallelEntityModifier(
                                    new ScaleModifier(3, 0.5f, 5),
                                    new RotationByModifier(3, 90)
                            ),
                            new ParallelEntityModifier(
                                    new ScaleModifier(3, 5, 1),
                                    new RotationModifier(3, 180, 0)
                            )
                    )
            );

        face.registerEntityModifier(entityModifier);
        rect.registerEntityModifier(entityModifier.clone());

        scene.attachChild(face);
        scene.attachChild(rect);

        return scene;
    }

    @Override
    public void onLoadComplete() {

    }

    // ===========================================================
    // Methods
    // ===========================================================

    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================
}

此代码是从示例项目Andengine中提取的.参考原始代码.