小程序源码 (堆房子).rar

package com.bh; import java.util.Random; import org.jbox2d.collision.AABB; import org.jbox2d.collision.PolygonDef; import org.jbox2d.common.Vec2; import org.jbox2d.dynamics.Body; import org.jbox2d.dynamics.BodyDef; import org.jbox2d.dynamics.World; import org.jbox2d.dynamics.joints.DistanceJoint; import org.jbox2d.dynamics.joints.DistanceJointDef; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Paint.Style; import android.util.Log; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.SurfaceHolder.Callback; public class MySurfaceView extends SurfaceView implements Callback, Runnable { private Thread th; private SurfaceHolder sfh; private Canvas canvas; private Paint paint; private boolean flag; public Context context; // ---添加物理世界 private float RATE = 30; private World world; private float stepTime = 1f / 60f; private int iteraTions = 10; // 背景图 private Bitmap bmpBg; // 添加砖块 private Bitmap bmp, bmpTile1, bmpTile2, bmpTile3; // 随机图块 private Random random; private int ran; //声明绑定在距离关节上的固定Body坐标与宽高 private int bodyWallX; private int bodyWallY; private int bodyWallW; private int bodyWallH; //与距离关节绑定的固定Body private Body bodyWall; //初始化游戏时绑定在距离关节的砖块 private Body bodyHouse; //创建临时Body，用于记录上一次绑定在距离关节上的砖块 private Body bodyTemp; // ---线条的颜色值 private int[] lineColor = { 0xFFDACDC5, 0xFF825B56, 0xFF3A3E59 }; // ---添加一个距离关节 private DistanceJoint dj; // ---添加body和joint的容器 private boolean isDown; private int isDownCount = 0;//下落计时器 private boolean isDeleteJoint; public MySurfaceView(Context context) { super(context); this.context = context; this.setKeepScreenOn(true); sfh = this.getHolder(); sfh.addCallback(this); paint = new Paint(); paint.setColor(Color.RED); paint.setStyle(Style.STROKE); paint.setAntiAlias(true); setFocusable(true); setFocusableInTouchMode(true); // ---添加物理世界 AABB aabb = new AABB(); aabb.lowerBound = new Vec2(-100, -100); aabb.upperBound = new Vec2(100, 100); Vec2 gravity = new Vec2(0, 10); world = new World(aabb, gravity, true); // --实例背景图 bmpBg = BitmapFactory.decodeResource(context.getResources(), R.drawable.background); // 实例砖块图片 bmpTile1 = BitmapFactory.decodeResource(context.getResources(), R.drawable.tile1); bmpTile2 = BitmapFactory.decodeResource(context.getResources(), R.drawable.tile2); bmpTile3 = BitmapFactory.decodeResource(context.getResources(), R.drawable.tile3); } //创建view与游戏初始化 public void surfaceCreated(SurfaceHolder holder) { bodyWallW = 40; bodyWallH = 2; bodyWallX = getWidth() / 2 - bodyWallW / 2; bodyWallY = 1; // 实例游戏初始两个绑定距离关节的Body bodyWall = createPolygon(bodyWallX, bodyWallY, bodyWallW, bodyWallH, 0, 0); bodyHouse = createMyTile(bodyWallX / 2, bodyWallY + bodyWallH + 50, bmpTile1.getWidth(), bmpTile1.getHeight(), 0, 1); //实例临时Body bodyTemp = bodyHouse; // 添加一个静态的下边界用于阻挡掉落的body createPolygon(0, getHeight(), getWidth() - 10, 10, 0, 0); // ---添加一个距离关节 dj = createDistanceJoint(bodyWall, bodyHouse); th = new Thread(this); flag = true; th.start(); } //创建距离关节 public DistanceJoint createDistanceJoint(Body body1, Body body2) { //创建距离关节信息 DistanceJointDef dj = new DistanceJointDef(); dj.body1 = body1; dj.body2 = body2; //初始化距离关节 dj.initialize(body1, body2, body1.getWorldCenter(), body2.getWorldCenter()); //通过World创建一个距离关节对象 return (DistanceJoint) world.createJoint(dj); } //创建装块 public Body createMyTile(float x, float y, float w, float h, float angle, float density) { PolygonDef pd = new PolygonDef(); pd.density = density; pd.friction = 0.8f; pd.restitution = 0.3f; pd.setAsBox(w / 2 / RATE, h / 2 / RATE); pd.filter.groupIndex = 2; BodyDef bd = new BodyDef(); bd.position.set((x + w / 2) / RATE, (y + h / 2) / RATE); bd.angle = (float) (angle * Math.PI / 180); Body body = world.createBody(bd); //实例随机库 random = new Random(); //取出0-2的随机整数 ran = random.nextInt(3); if (ran == 0) bmp = bmpTile1; else if (ran == 1) bmp = bmpTile2; else if (ran == 2) bmp = bmpTile3; body.m_userData = new MyTile(x, y, w, h, bmp); body.createShape(pd); body.setMassFromShapes(); return body; } //创建矩形Body public Body createPolygon(float x, float y, float w, float h, float angle, float density) { PolygonDef pd = new PolygonDef(); pd.density = density; pd.friction = 0.8f; pd.restitution = 0.3f; pd.setAsBox(w / 2 / RATE, h / 2 / RATE); BodyDef bd = new BodyDef(); bd.position.set((x + w / 2) / RATE, (y + h / 2) / RATE); bd.angle = (float) (angle * Math.PI / 180); Body body = world.createBody(bd); body.m_userData = new MyRect(x, y, w, h); body.createShape(pd); body.setMassFromShapes(); return body; } //绘制函数 public void draw() { try { //获取画布实例 canvas = sfh.lockCanvas(); //刷屏 canvas.drawColor(Color.BLACK); //绘制游戏背景图 canvas.drawBitmap(bmpBg, 0, -Math.abs(getHeight() - bmpBg.getHeight()), paint); //遍历绘制Body Body body = world.getBodyList(); for (int i = 1; i < world.getBodyCount(); i++) { if ((body.m_userData) instanceof MyRect) { MyRect rect = (MyRect) (body.m_userData); rect.drawRect(canvas, paint); } else if ((body.m_userData) instanceof MyTile) { MyTile tile = (MyTile) (body.m_userData); tile.drawMyTile(canvas, paint); } body = body.m_next; } if (bodyWall != null && bodyHouse != null) { if (dj != null) { //设置画笔颜色 //lineColor:int 数组 ，保存三种颜色值；分别表示不同方砖的悬挂绳颜色 paint.setColor(lineColor[ran]); //设置画笔的粗细程度 paint.setStrokeWidth(3); //绘制关节 canvas.drawLine(bodyWall.getPosition().x * RATE, bodyWall.getPosition().y * RATE, bodyTemp.getPosition().x * RATE, bodyTemp.getPosition().y * RATE, paint); } } } catch (Exception e) { // TODO: handle exception } finally { try { if (canvas != null) sfh.unlockCanvasAndPost(canvas); } catch (Exception e2) { } } } //逻辑处理函数 private void logic() { //物理世界模拟 world.step(stepTime, iteraTions); ///遍历Body，进行Body与图形之间的传递数据 Body body = world.getBodyList(); for (int i = 1; i < world.getBodyCount(); i++) { //判定m_userData中的数据是否为MyRect实例 if ((body.m_userData) instanceof MyRect) { MyRect rect = (MyRect) (body.m_userData); rect.setX(body.getPosition().x * RATE - rect.getWidth() / 2); rect.setY(body.getPosition().y * RATE - rect.getHeight() / 2); rect.setAngle((float) (body.getAngle() * 180 / Math.PI)); } else if ((body.m_userData) instanceof MyTile) { //判定m_userData中的数据是否为MyTile实例 MyTile tile = (MyTile) (body.m_userData); tile.setX(body.getPosition().x * RATE - tile.getWidth() / 2); tile.setY(body.getPosition().y * RATE - tile.getHeight() / 2); tile.setAngle((float) (body.getAngle() * 180 / Math.PI)); } body = body.m_next; } if (isDeleteJoint) { world.destroyJoint(dj);// 销毁关节 dj = null; isDeleteJoint = false; } //动态Body是否下落 if (isDown == true) { //计时器计时 isDownCount++; //计时器时间 if (isDownCount % 120 == 0) { //创建新的动态Body-砖块，并且使用临时Body保存最新动态Body bodyTemp = createMyTile(bodyWallX / 2, bodyWallY + bodyWallH + 50, bmpTile1.g