Android 球碰撞反弹 (1)

不多说上码

1. Ball Class:

public class LeBall {private float xAxis ;private float yAxis ;private float radius;private int angle;private int order;private Bitmap bitmap;public LeBall(float x, float y, float r, int o, Bitmap bitmap) {// TODO Auto-generated constructor stubthis.xAxis = x;this.yAxis = y;this.radius = r;this.order = o;this.bitmap = bitmap;this.angle = new Random().nextInt(LeCrashValues.degree);}public void draw(Canvas canvas) {// TODO Auto-generated method stubcanvas.drawBitmap(this.bitmap, xAxis, yAxis, null);}public float getxAxis() {return xAxis;}public void setxAxis(float xAxis) {this.xAxis = xAxis;}public float getyAxis() {return yAxis;}public void setyAxis(float yAxis) {this.yAxis = yAxis;}public float getRadius() {return radius;}public void setRadius(float radius) {this.radius = radius;}public int getAngle() {return angle;}public void setAngle(int angle) {this.angle = angle;}public int getOrder() {return order;}public void setOrder(int order) {this.order = order;}}

2. SurfaceView Class:

public class LeBallSurfaceView extends SurfaceView implements SurfaceHolder.Callback {private LeDrawThread drawThread;private LeBallThread ballThread;private Bitmap bg;private Bitmap[] bitmaps;private LeBall moveBall;private int mapCount = 0;private int ballCount = 0;private int currentCount = 0;public static List<LeBall> ballList = new Vector<LeBall>();public LeBallSurfaceView(Context context) {super(context);// TODO Auto-generated constructor stubgetHolder().addCallback(this);initBitmaps(getResources());addMoveBall(20, 20);drawThread = new LeDrawThread(this, getHolder());ballThread = new LeBallThread();} @Overridepublic void surfaceCreated(SurfaceHolder holder) {// TODO Auto-generated method stubif (!drawThread.isAlive()) {drawThread.start();}if (!ballThread.isAlive()) {ballThread.start();}}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {// TODO Auto-generated method stub}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {ballList.clear();ballList = null;drawThread.setRunning(false);drawThread = null;ballThread.setRunning(false);ballThread = null;}public void doDraw(Canvas canvas) {canvas.drawBitmap(bg, 0, 0, null);if (null == ballList)return;for (LeBall mb : ballList) {mb.draw(canvas);}}private void initBitmaps(Resources r) {// TODO Auto-generated method stubbg = BitmapFactory.decodeResource(r, R.drawable.bg);bitmaps = new Bitmap[] {BitmapFactory.decodeResource(r, R.drawable.red),BitmapFactory.decodeResource(r, R.drawable.green),BitmapFactory.decodeResource(r, R.drawable.base),BitmapFactory.decodeResource(r, R.drawable.next),BitmapFactory.decodeResource(r, R.drawable.heaven)};mapCount = bitmaps.length;}public void addMoveBall(float x, float y) {if (null == ballList)ballList = new Vector<LeBall>();moveBall = new LeBall(x, y, LeCrashValues.ballSize / 2, ballCount, bitmaps[new Random().nextInt(mapCount)]);ballList.add(moveBall);ballCount ++;currentCount ++;Log.v(this.getClass().getName(), "current ball count="+currentCount);}public void removeMoveBall(LeBall mb) {ballList.remove(mb);mb = null;currentCount --;Log.v(this.getClass().getName(), "current ball count="+currentCount);}}

3. two Thread:

public class LeBallThread extends Thread {private boolean running = true;public LeBallThread() {super.setName("##-LeBall-");}public void run() {while (running) {moveBall();LeCrashValues.sleep();}}private void moveBall() {try {for (LeBall mb : LeBallSurfaceView.ballList) {moveBall(mb);checkCrash(mb);}} catch (Exception e) {e.printStackTrace();}}private void moveBall(LeBall mb){mb.setxAxis(mb.getxAxis() + (float)(LeCrashValues.velocity * LeTrigonometricFunction.cos(mb.getAngle())));mb.setyAxis(mb.getyAxis() + (float)(LeCrashValues.velocity * LeTrigonometricFunction.sin(mb.getAngle())));}private void checkCrash(LeBall mb) {if (checkForEdge(mb))return;checkForCrash(mb);}private boolean checkForEdge(LeBall mb) {if (mb.getxAxis() <= LeCrashValues.fieldLeft) {if (mb.getAngle() > 90 && mb.getAngle() <= 180) {mb.setAngle(180 - mb.getAngle());} else if (mb.getAngle() > 180 && mb.getAngle() < 270) {mb.setAngle(540 - mb.getAngle());}return true;} else if (mb.getxAxis() >= LeCrashValues.fieldRight - LeCrashValues.ballSize) {if (mb.getAngle() >= 0 && mb.getAngle() < 90) {mb.setAngle(180 - mb.getAngle());} else if (mb.getAngle() > 270 && mb.getAngle() < 360) {mb.setAngle(540 - mb.getAngle());}return true;} else if (mb.getyAxis() <= LeCrashValues.fieldTop) {if (mb.getAngle() > 180 && mb.getAngle() < 360) {mb.setAngle(360 - mb.getAngle());}return true;} else if (mb.getyAxis() >= LeCrashValues.fieldBottom - LeCrashValues.ballSize) {if (mb.getAngle() > 0 && mb.getAngle() < 180) {mb.setAngle(360 - mb.getAngle());}return true;}return false;}private void checkForCrash(LeBall moveBall) {if (null == LeBallSurfaceView.ballList)return;try {for (LeBall mb : LeBallSurfaceView.ballList) {if (mb.getOrder() > moveBall.getOrder()) {if (isCrash(moveBall.getxAxis() - mb.getxAxis(), moveBall.getyAxis() - mb.getyAxis(), LeCrashValues.diameter)) {handleCrash(moveBall, mb);}}}} catch (Exception e) {e.printStackTrace();}}private void handleCrash(LeBall b1, LeBall b2) {Log.v(this.getClass().getName(), this.getName() + b1.getOrder() + "--------angle="+b1.getAngle());int angle = b2.getAngle();b2.setAngle(b1.getAngle());b1.setAngle(angle);moveBall(b1);while (!isSeperated(b1, b2)) {moveBall(b1);}}private boolean isSeperated(LeBall b1, LeBall b2) {if (isCrash(b1.getxAxis() - b2.getxAxis(), b1.getyAxis() - b2.getyAxis(), LeCrashValues.diameter))return false;return true;}private boolean isCrash(float x, float y, float d) {if (pow(x) + pow(y) <= pow(d))return true;return false;}private float pow(float x) {return x * x;}public boolean isRunning() {return running;}public void setRunning(boolean running) {this.running = running;}}

public class LeDrawThread extends Thread {private boolean running = true;private LeBallSurfaceView view;private SurfaceHolder holder;public LeDrawThread(LeBallSurfaceView view, SurfaceHolder holder) {// TODO Auto-generated constructor stubthis.view = view;this.holder = holder;this.running = true;}public void run() {Canvas canvas = null;while (running) {try {canvas = holder.lockCanvas(null);synchronized (holder) {view.doDraw(canvas);}} catch (Exception e) {e.printStackTrace();} finally {if (canvas != null) {holder.unlockCanvasAndPost(canvas);}}LeCrashValues.sleep();}}public boolean isRunning() {return running;}public void setRunning(boolean running) {this.running = running;}}

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