android烟花粒子效果

package com.fireview; import java.io.InputStream; import java.util.Random; import java.util.Vector; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.view.MotionEvent; import android.view.View; import com.dot.Dot; import com.dot.DotFactory; import com.dot.LittleDot; import com.firework.R; public class MyView extends View { final String LOG_TAG = MyView.class.getSimpleName(); public static final int ID_SOUND_UP = 0; public static final int ID_SOUND_BLOW = 1; public static final int ID_SOUND_MULTIPLE = 2; final static int TIME = 5; // 圈数 private Vector<Dot> lList = new Vector<Dot>(); LittleDot[] ld = new LittleDot[200]; private DotFactory df = null; boolean running = true; Bitmap backGroundBitmap; Context mContext; public static SoundPlay soundPlay; public MyView(Context context) { super(context); // TODO Auto-generated constructor stub df = new DotFactory(); new MyThread().start(); mContext = context; backGroundBitmap = ReadBitMap(mContext, R.drawable.night); backGroundBitmap = resizeImage(backGroundBitmap, 480, 800); initSound(mContext); } public static void initSound(Context context) { soundPlay = new SoundPlay(); soundPlay.initSounds(context); soundPlay.loadSfx(context, R.raw.up, ID_SOUND_UP); soundPlay.loadSfx(context, R.raw.blow, ID_SOUND_BLOW); soundPlay.loadSfx(context, R.raw.multiple, ID_SOUND_MULTIPLE); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawBitmap(backGroundBitmap, 0, 0, null); synchronized (lList) { for (int i = 0; i < lList.size(); i++) { lList.get(i).myPaint(canvas, lList); } } invalidate(); } @Override public boolean onTouchEvent(MotionEvent event) { // TODO Auto-generated method stub if (event.getAction() == MotionEvent.ACTION_DOWN) { Dot dot = null; int rand = (int) (Math.random() * 99); dot = df.makeDot(mContext, rand, (int) event.getX(), (int) event.getY()); synchronized (lList) { lList.add(dot); soundPlay.play(ID_SOUND_UP, 0); } } return true; } public boolean isRunning() { return running; } public void setRunning(boolean running) { this.running = running; } public Bitmap ReadBitMap(Context context, int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; // 获取资源图片 InputStream is = context.getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } public Bitmap resizeImage(Bitmap mBitmap, int w, int h) { Bitmap BitmapOrg = mBitmap; int width = BitmapOrg.getWidth(); int height = BitmapOrg.getHeight(); int newWidth = w; int newHeight = h; float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; Matrix matrix = new Matrix(); matrix.postScale(scaleWidth, scaleHeight); Bitmap tmp = Bitmap.createBitmap(BitmapOrg, 0, 0, width, height, matrix, true); return tmp; } class MyThread extends Thread { // 新建一个进程类来处理重画 // 用于控制烟火在空中滞留的时间 int times = 0; public void run() { Dot dot = null; while (running) { try { Thread.sleep(100); } catch (Exception e) { System.out.println(e); } synchronized (lList) { // 防止画面的烟花个数多于50个 while (lList.size() > 50) { System.out.println("当前数目超过50"); for (int i = 0; i < 10; i++) { lList.remove(i); } } // 自动添加烟火 if (lList.size() <= 2) { Dot tmp = null; int rand = (int) (Math.random() * 99); Random random = new Random(); tmp = df.makeDot(mContext, rand, random.nextInt(480), 50 + random.nextInt(300)); lList.add(tmp); } } for (int i = 0; i < lList.size(); i++) { dot = (Dot) lList.get(i); if (dot.state == 1 && !dot.whetherBlast()) { dot.rise(); } // 如果是whetherBlast()返回的是true，那么就把该dot的state设置为2 else if (dot.state == 1 && dot.state != 2) { dot.state = 2; soundPlay.play(ID_SOUND_BLOW, 0); } else if (dot.state == 3) { } // 规定，每个爆炸点最多是TIME圈，超过就会消失 if (dot.circle >= TIME) { // 在空中滞留一秒才消失 if (times >= 10) { dot.state = 4; times = 0; } else { times++; } // dot.state = 4; } } } } } }