AndEngine：显示所有精灵图像相同

Question

AndEngine：显示所有精灵图像相同

4

图片描述我有4个精灵。我将这4个精灵放置在移动屏幕的不同位置上。但它正在使用最后添加的精灵图像（sprite4.png），即所有精灵图像（sprite1.png，sprite2.png，sprite3.png和sprite4.png）都显示相同。简而言之，它显示了所有精灵图像相同的问题。以下是代码，请分享你的经验。

// the below code is running without error but displaying same images in all the sprites
package com.example.test1;

import org.andengine.engine.camera.Camera;
import org.andengine.engine.options.EngineOptions;
import org.andengine.engine.options.ScreenOrientation;
import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.andengine.entity.scene.Scene;
import org.andengine.entity.scene.background.Background;
import org.andengine.entity.sprite.Sprite;
import org.andengine.entity.util.FPSLogger;
import org.andengine.input.touch.TouchEvent;
import org.andengine.opengl.texture.TextureOptions;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.andengine.opengl.texture.region.ITextureRegion;

/*;
 * (c) 2010 Nicolas Gramlich
 * (c) 2011 Zynga
 *
 * @author Nicolas Gramlich
 * @since 15:13:46 - 15.06.2010
 */
public class Puzzle extends GameActivity {
    // ===========================================================
    // Constants
    // ===========================================================

    private static final int CAMERA_WIDTH = 720;
    private static final int CAMERA_HEIGHT = 480;
    final Scene scene = new Scene();

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

    private BitmapTextureAtlas mBitmapTextureAtlas;
    private ITextureRegion spriteTextureRegion1;
    private ITextureRegion spriteTextureRegion2;
    private ITextureRegion spriteTextureRegion3;
    private ITextureRegion spriteTextureRegion4;


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

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

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

    @Override
    public EngineOptions onCreateEngineOptions() {
    //  Toast.makeText(this, "Touch & Drag the face!", Toast.LENGTH_LONG).show();

        final Camera camera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);

        return new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), camera);
    }

    @Override
    public void onCreateResources() {
        BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");

        this.mBitmapTextureAtlas = new BitmapTextureAtlas(this.getTextureManager(), 96, 96, TextureOptions.BILINEAR);
        this.spriteTextureRegion1 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite1.png", 0, 0);
        this.spriteTextureRegion2 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite2.png", 0, 0);
        this.spriteTextureRegion3 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite3.png", 0, 0);
        this.spriteTextureRegion4= BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite4.png", 0, 0);   


    //  scene.attachChild(sprite1);  

        this.mBitmapTextureAtlas.load();
    }

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


        scene.setBackground(new Background(0.09804f, 0.6274f, 0.8784f));

        /* set sprite1 positions on screen */
        final float sprite1_posX = (40);  
        final float sprite1_posY = (40);
        final Sprite sprite1 = new Sprite(sprite1_posX, sprite1_posY, this.spriteTextureRegion1, this.getVertexBufferObjectManager()) {
            @Override
            public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
                this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2, pSceneTouchEvent.getY() - this.getHeight() / 2);
                return true;
            }
        };
        //sprite1.setScale(3);
        scene.attachChild(sprite1);
        scene.registerTouchArea(sprite1);
        scene.setTouchAreaBindingOnActionDownEnabled(true);

        /* set sprite2 positions on screen  */
        final Sprite sprite2 = new Sprite(sprite1_posX, sprite1_posY + (sprite1.getHeight()*3 + 10), this.spriteTextureRegion2, this.getVertexBufferObjectManager()) {
            @Override
            public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
                this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2, pSceneTouchEvent.getY() - this.getHeight() / 2);
                return true;
            }
        }; 
        //sprite2.setScale(3);
        scene.attachChild(sprite2);
        scene.registerTouchArea(sprite2);
        scene.setTouchAreaBindingOnActionDownEnabled(true); 

         /* set sprite3 positions on screen  */
        final Sprite sprite3 = new Sprite(sprite1_posX, sprite1_posY + (sprite1.getHeight() + 20), this.spriteTextureRegion3, this.getVertexBufferObjectManager()) {
            @Override
            public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
                this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2, pSceneTouchEvent.getY() - this.getHeight() / 2);
                return true;
            }
        };
    //  sprite3.setScale(3);
        scene.attachChild(sprite3);
        scene.registerTouchArea(sprite3);
        scene.setTouchAreaBindingOnActionDownEnabled(true);


    /*  set sprite3 positions on screen  */
    final Sprite sprite4 = new Sprite(sprite1_posX, sprite1_posY + (sprite1.getHeight() + 30), this.spriteTextureRegion4, this.getVertexBufferObjectManager()) {
        @Override
        public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
            this.setPosition(pSceneTouchEvent.getX() - this.getWidth() / 2, pSceneTouchEvent.getY() - this.getHeight() / 2);
            return true;
        }
    };
//  sprite4.setScale(3);
    scene.attachChild(sprite4);
    scene.registerTouchArea(sprite4);
    scene.setTouchAreaBindingOnActionDownEnabled(true);

    return scene;
}
}

- SMT

请问您能否重新表述一下您的问题？A）所有图片是否都放置在同一个位置？B）它们的大小是否相同，而实际上不应该是这样的吗？C）还有其他问题吗？ - Łukasz Motyczka

1个回答

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- Łukasz Motyczka · Accepted Answer

抱歉，我知道问题出在哪里：

    this.spriteTextureRegion1 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite1.png", 0, 0);
    this.spriteTextureRegion2 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite2.png", 0, 0);
    this.spriteTextureRegion3 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite3.png", 0, 0);
    this.spriteTextureRegion4= BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite4.png", 0, 0);

最后，在你放置0,0的地方，你声明了你的区域应该位于纹理图集的哪个位置。想象一下你把贴纸放在一张纸上。你先放一个，然后再放另一个，第三个和第四个。这样你只能看到最上面的那个。因此，你必须将你的区域放置在纹理图集的不同位置。如果你所有的图像都是40x40，它应该看起来像这样（也许你的图集可能更大（512x512）：

this.mBitmapTextureAtlas = new BitmapTextureAtlas(this.getTextureManager(), 512, 512, TextureOptions.BILINEAR);

    this.spriteTextureRegion1 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite1.png", 0, 0);
    this.spriteTextureRegion2 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite2.png", 50, 0);
    this.spriteTextureRegion3 = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite3.png", 0, 50);
    this.spriteTextureRegion4= BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "sprite4.png", 50, 50);