andEngine > 学习1

 

http://blog.csdn.net/cen616899547/article/category/1269391 

 

1.下载AndEngine源代码:

 

      网址:https://github.com/nicolasgramlich/AndEngine

 

2.  导入 andengine 工程 , 此时就有了一个 AndEngine 工程

 

3.  新建一个基础的android project ( 比如licai)

 

4. 将 AndEngine/bin/andengine.jar  拷贝到 新的project 的libs 中.   licai/libs/

 

5. ,右键选择新的project(licai)  -> Build Path->Configure build path

然后选择Projects,点击右边的Add.选择上AndEngine

 

6. 拷贝 下面的图 bg.png   ,  smell.png 到 licai 工程的 assets 下.

 

7. licai工程的 MAIN.JAVA 修改成如下代码

 

package licai.mft;

import org.andengine.engine.camera.Camera;  
import org.andengine.engine.options.EngineOptions;  
import org.andengine.engine.options.ScreenOrientation;  
import org.andengine.engine.options.resolutionpolicy.IResolutionPolicy;  
import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;  
import org.andengine.entity.scene.Scene;  
import org.andengine.entity.scene.background.RepeatingSpriteBackground;  
import org.andengine.entity.sprite.AnimatedSprite;  
import org.andengine.entity.sprite.TiledSprite;  
import org.andengine.entity.sprite.vbo.ITiledSpriteVertexBufferObject;  
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.atlas.bitmap.source.AssetBitmapTextureAtlasSource;  
import org.andengine.opengl.texture.region.ITiledTextureRegion;  
import org.andengine.opengl.texture.region.TiledTextureRegion;  
import org.andengine.opengl.vbo.VertexBufferObjectManager;  
import org.andengine.ui.activity.BaseGameActivity;  
  
import android.app.Activity;  
import android.util.Log;  
import android.view.Menu;  
import android.view.MenuItem;  
import android.support.v4.app.NavUtils;  

public class MainActivity extends BaseGameActivity {
	private static final int CAMERA_WIDTH = 800;  
    private static final int CAMERA_HEIGHT = 480;  
    private final static float BALL_VELOCITY = 100f;//球的移动速度  
      
    private Camera mCamera;  
    private Scene mScene;  
    private RepeatingSpriteBackground background;  
    private TiledTextureRegion mFaceTextureRegion;  
      
    @Override  
    public EngineOptions onCreateEngineOptions() {  
        // TODO Auto-generated method stub  
          
        mCamera = new Camera(0,0,CAMERA_WIDTH,CAMERA_HEIGHT);  
        EngineOptions mEngineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE_SENSOR, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), mCamera);  
          
        return mEngineOptions;  
    }  
  
    @Override  
    public void onCreateResources(  
            OnCreateResourcesCallback pOnCreateResourcesCallback)  
            throws Exception {  
        // TODO Auto-generated method stub  
        this.background = new RepeatingSpriteBackground(CAMERA_WIDTH, CAMERA_HEIGHT,    
                   getTextureManager(), AssetBitmapTextureAtlasSource.create(    
                    this.getAssets(), "bg.png"),    
                    getVertexBufferObjectManager());   
          
          
        BitmapTextureAtlas mTexture = new BitmapTextureAtlas(getTextureManager(),64,32,TextureOptions.BILINEAR_PREMULTIPLYALPHA);  
        mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createTiledFromAsset(mTexture, this, "smell.png", 0, 0,2,1);  
          
        /** 
         * 参数说明: 
         * mTexure是在内存中放置贴图资源用的,64,32是图片要求的宽和高,必须是2的n次方大小.如:2,4,8,16,32,64,128,512,1024.... 
         * 并且要比原图的宽高要大 
         *  
         * mFaceTextureRegion相当于从mTexure中扣图,因为mTexure是由很多图集组成的,要从中截取一片出来 
         * 0,0代表截图的top,right坐标(起点坐标),2和1分别代表贴图中一张存在2列1行 
         *  
         */  
        mTexture.load();  
          
        pOnCreateResourcesCallback.onCreateResourcesFinished();  
    }  
  
    @Override  
    public void onCreateScene(OnCreateSceneCallback pOnCreateSceneCallback)  
            throws Exception {  
        // TODO Auto-generated method stub  
        mScene = new Scene();  
        mScene.setBackground(background);  
          
        final float centerX = (CAMERA_WIDTH - mFaceTextureRegion.getWidth()) / 2;//计算贴图的中心坐标  
        final float centerY = (CAMERA_HEIGHT - mFaceTextureRegion.getHeight()) / 2;  
        final Ball mBall = new Ball(centerX, centerY,32, 32,this.mFaceTextureRegion,getVertexBufferObjectManager());  
          
        mScene.attachChild(mBall);  
        pOnCreateSceneCallback.onCreateSceneFinished(mScene);  
    }  
  
    @Override  
    public void onPopulateScene(Scene pScene,  
            OnPopulateSceneCallback pOnPopulateSceneCallback) throws Exception {  
        // TODO Auto-generated method stub  
          
          
          
        pOnPopulateSceneCallback.onPopulateSceneFinished();  
    }  
  
      
    private static class Ball extends AnimatedSprite{  
             
          
        float mVelocityX = BALL_VELOCITY;//球的x方向速度  
        float mVelocityY = BALL_VELOCITY ;//球的y方向速度  
  
        public Ball(float pX, float pY, float pWidth, float pHeight,  
                ITiledTextureRegion pTiledTextureRegion,  
                VertexBufferObjectManager pVertexBufferObjectManager) {  
            super(pX, pY, pWidth, pHeight, pTiledTextureRegion, pVertexBufferObjectManager);  
            // TODO Auto-generated constructor stub  
            mX = 100;  
            mY = 100;  
        }  
  
        @Override  
        protected void onManagedUpdate(float pSecondsElapsed) {  
            // TODO Auto-generated method stub  
              
                if(this.mX < 0) {  
                    setVelocityX(BALL_VELOCITY);  
                } else if(  this.mX + this.getWidth() > CAMERA_WIDTH){  
                    setVelocityX(-BALL_VELOCITY);  
  
                }  
  
                if(this.mY < 0 ) {  
                    setVelocityY(BALL_VELOCITY);  
                } else if(this.mY + this.getHeight() > CAMERA_HEIGHT){  
                    setVelocityY(-BALL_VELOCITY);  
                }  
                  
              
  
                mX += mVelocityX * pSecondsElapsed;  
                mY += mVelocityY * pSecondsElapsed;  
                  
                  
                this.setPosition(mX, mY);  
            Log.d("Season",pSecondsElapsed + "");  
              
            super.onManagedUpdate(pSecondsElapsed);  
              
              
        }  
          
        void setVelocityX(float vx){  
              
            mVelocityX = vx;  
        }  
          
          
        void setVelocityY(float vy){  
            mVelocityY = vy;  
        }  
          
          
          
          
    }  

}