andengine背景滚动循环

package com.testsprite; 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.resolutionpolicy.RatioResolutionPolicy; import org.anddev.andengine.entity.scene.Scene; import org.anddev.andengine.entity.scene.background.AutoParallaxBackground; import org.anddev.andengine.entity.scene.background.ParallaxBackground; import org.anddev.andengine.entity.sprite.Sprite; import org.anddev.andengine.opengl.texture.Texture; import org.anddev.andengine.opengl.texture.region.TextureRegion; import org.anddev.andengine.opengl.texture.region.TextureRegionFactory; import org.anddev.andengine.ui.activity.BaseGameActivity; public class TestSprite extends BaseGameActivity { final int CAMERA_WIDTH = 480; final int CAMERA_HEIGHT = 800; Camera mCamera = null; Scene mMainScene = null; AutoParallaxBackground mBackground = new AutoParallaxBackground(0,0,0,5); @Override public Engine onLoadEngine() { mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT); return new Engine(new EngineOptions(true, EngineOptions.ScreenOrientation.PORTRAIT, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera).setNeedsSound(true)); //To change body of implemented methods use File | Settings | File Templates. } @Override public void onLoadResources() { //To change body of implemented methods use File | Settings | File Templates. } @Override public Scene onLoadScene() { mMainScene = new Scene(2); Texture texture = new Texture(2048,128); TextureRegion region = TextureRegionFactory.createFromAsset(texture,this,"bg_snow_cycle.png",0,0); Sprite snowSprite1 = new Sprite(0,70,region); mEngine.getTextureManager().loadTexture(texture); mBackground.addParallaxEntity(new ParallaxBackground.ParallaxEntity(-10,snowSprite1)); mMainScene.setBackground(mBackground); return mMainScene; //To change body of implemented methods use File | Settings | File Templates. } @Override public void onLoadComplete() { //To change body of implemented methods use File | Settings | File Templates. } }